KERAVISION INC /CA/
S-3, 1998-07-13
OPHTHALMIC GOODS
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<PAGE>   1
   As filed with the Securities and Exchange Commission on July 13, 1998.
================================================================================
                                               Registration No. 333

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                                KERAVISION, INC.
              ----------------------------------------------------
             (Exact name of Registrant as Specified in Its Charter)

                                      DELAWARE
         --------------------------------------------------------------
         (State or Other Jurisdiction of Incorporation or Organization)

                                    77-0328942
                      -----------------------------------
                      (I.R.S. Employer Identification No.)


                              48630 MILMONT DRIVE
                               FREMONT, CA  94538
                                 (510) 353-3000
               --------------------------------------------------
               (Address, including zip code and telephone number,
                      including area code, of Registrant's
                          principal executive offices)
            ---------------------------------------------------------
                            Thomas M. Loarie
                 Chairman, President and Chief Executive Officer
                                KERAVISION, INC.
                              48630 MILMONT DRIVE
                               FREMONT, CA  94538
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
            ---------------------------------------------------------
                                   COPIES TO:
                                 Michael W. Hall
                              Edmund S. Ruffin, Jr.
                               Stephen B. Thau
                              VENTURE LAW GROUP
                          A Professional Corporation
                             2800 Sand Hill Road
                         Menlo Park, California 94025
            ---------------------------------------------------------

        Approximate date of commencement of proposed sale to the public:
As soon as practicable after the effective date of this Registration Statement
        ---------------------------------------------------------------
         If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]

         If any of the securities being registered on this Form are to be
offered on a delayed or continuous basis pursuant to Rule 415 under the
Securities Act of 1933, check the following box.  [X]

         If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [ ]

         If this Form is a post-effective amendment filed pursuant to Rule
462(c) under the Securities Act, check the following box and list the Securities
Act registration statement number of the earlier effective registration
statement for the same offering. [ ]

         If delivery of the prospectus is expected to be made pursuant to Rule
434, please check the following box. [ ]

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
  Title of Each                     Proposed         Proposed       
    Class Of                         Maximum          Maximum      Amount of
  Securities to    Amount To Be  Offering Price      Aggregate    Registration
  be Registered   Registered (1)  Per Unit (1)   Offering Price(1)   Fee
- ----------------- -------------- --------------- ----------------- -----------
<S>                    <C>             <C>              <C>            <C>
  Common Stock,       2,565,000          $7.657       $19,640,205   $5,793.86
par value $0.001

</TABLE>

1)  Estimated solely for the purpose of computing the amount of the
    registration fee based on the average of the high and low closing price 
    of the Common Stock as reported on The Nasdag National Market on
    July 7, 1998, pursuant to Rule 457(c).

         THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE
OR DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
================================================================================

                                 KERAVISION, INC.
                                ------------------
                                   Common Stock  
                                ------------------
The Common Stock offered hereby involves a high degree of risk.  
See "Risk Factors" on page 5 of this Prospectus for information that 
should be considered by prospective investors.  

All references herein to "KeraVision" or the "Company" mean 
KeraVision, Inc. unless otherwise indicated by the context.
The  2,565,000 shares of KeraVision Common Stock, $0.001 par 
value, covered by this Prospectus (the "Shares") are offered for the 
account of certain stockholders of the Company (the "Selling 
Stockholders").  The Shares are issuable upon conversion of Series B 
Convertible Preferred Stock issued to the Selling Stockholders in 
connection with a Series B Convertible Stock Purchase Agreement dated as 
of June 12, 1998 between the Company and the Selling Stockholders.  For 
additional information concerning the Shares, see "Issuance of Common 
Stock to Selling Stockholders."  The Selling Stockholders may sell the 
Shares from time to time on the over-the-counter market in regular 
brokerage transactions, in transactions directly with market makers or 
in certain privately negotiated transactions.  See "Plan of 
Distribution."  Each Selling Shareholder has advised the Company that no 
sale or distribution other than as disclosed herein will be effected 
until after this Prospectus shall have been appropriately amended or 
supplemented, if required, to set forth the terms thereof.  The Company 
will not receive any proceeds from the sale of the Shares by the Selling 
Stockholders.
Each of the Selling Stockholders may be deemed to be an 
"Underwriter," as such term is defined in the Securities Act of 1933, as 
amended (the "Securities Act").
On July 7, 1998, the last sale price of the Company's Common Stock 
on The Nasdaq National Market was $7.938 per share.

THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES  AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.

<TABLE>
<CAPTION>

                                       Underwriting     Proceeds to
                         Price to     Discounts and       Selling
                          Public      Commissions(1)  Stockholders(1)
- --------------------  --------------  --------------  ---------------
<S>                   <C>             <C>             <C>
Per share ......      See Text Above  See Text Above  See Text Above
Total ..........

</TABLE>

(1)     All expenses of registration of the Shares, estimated to be 
approximately $1,360,958.70 shall be borne by the Company.  
Selling commissions, brokerage fees, any applicable stock transfer 
taxes and any fees and disbursements of counsel to the Selling 
Stockholders are payable individually by the Selling Stockholders.
The date of this Prospectus is _____, 1998

NO PERSON IS AUTHORIZED IN CONNECTION WITH ANY OFFERING MADE HEREBY TO 
GIVE ANY INFORMATION OR TO MAKE ANY REPRESENTATION NOT CONTAINED IN THIS 
PROSPECTUS, AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATION 
MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY OR THE 
SELLING SHAREHOLDER.  THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO 
SELL OR A SOLICITATION OF AN OFFER TO BUY ANY SECURITY OTHER THAN THE 
SHARES OF COMMON STOCK OFFERED HEREBY, NOR DOES IT CONSTITUTE AN OFFER 
TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY OF THE SHARES OFFERED 
HEREBY TO ANY PERSON IN ANY JURISDICTION IN WHICH IT IS UNLAWFUL TO MAKE 
SUCH AN OFFER OR SOLICITATION.  NEITHER THE DELIVERY OF THIS PROSPECTUS 
NOR ANY SALE MADE HEREUNDER SHALL UNDER ANY CIRCUMSTANCES CREATE ANY 
IMPLICATION THAT THE INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY 
TIME SUBSEQUENT TO THE DATE HEREOF.

                       AVAILABLE INFORMATION

The Company is subject to the informational requirements of the 
Securities Exchange Act of 1934, as amended (the "Exchange Act") and in 
accordance therewith files proxy statements, reports and other 
information with the Securities and Exchange Commission (the 
"Commission").  Reports, proxy and information statements, and other 
information filed by the Company with the Commission can be inspected 
and copied at the public reference facilities maintained by the 
Commission in Washington, D.C., and at its Regional Offices located at 
Citicorp Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 
60661-2511 and 7 World Trade Center, Suite 1300, New York, New York 
10048; and at the Public Reference Office of the Commission at 450 Fifth 
Street, N.W., Washington, D.C. 20549.  In addition, the registrant is an 
electronic filer and copies of such material may be retrieved from the 
Web site (http://www.sec.gov) maintained by the Commission.

Copies of such material can be obtained from the Public Reference 
Section of the Commission, 450 Fifth Street, N.W., Washington, D.C. 
20549 at prescribed rates.  The Company's Common Stock is quoted on The 
Nasdaq National Market under the symbol "KERA." Reports, proxy and 
information statements and other information about the Company may be 
inspected at The Nasdaq National Market, 1735 K Street, N.W., 
Washington, DC 20006-1506.

                    INFORMATION INCORPORATED BY REFERENCE

The following documents filed by the Company with the Commission 
are incorporated by reference in this Prospectus:

1.      The Company's Annual Report on Form 10-K for the fiscal year 
ended December 31, 1997 filed on March 30, 1998 pursuant to Section 
13(a) of the Exchange Act.  The Company's Annual Report on Form 10-K 
contains audited financial statements for the Company's latest fiscal 
year ended December 31, 1997.

2.      The Company's Definitive Proxy Statement on Form 14A filed 
on March 30, 1998 pursuant to Section 14(a) of the Exchange Act.
quarterly period ending on March 31, 1998 filed on May 12, 1998 pursuant 
to Section 13 or 15(d) of the Exchange Act.

4.      The description of the Company's Common Stock contained in 
the Company's Registration Statement on Form 8-A filed on June 27, 1995, 
pursuant to Section 12 of the Exchange Act, including any amendment or 
report filed for the purpose of updating such description.

All documents filed by the Company pursuant to Sections 13(a), 
13(c), 14 or 15(d) of the Exchange Act after the date of this Prospectus 
and prior to the termination of the offering of the Common Stock offered 
hereby shall be deemed to be incorporated by reference in this 
Prospectus.  Any statement contained in a document incorporated by 
reference herein shall be deemed to be modified or superseded for 
purposes hereof to the extent that a statement contained herein (or in 
any other subsequently filed document which also is incorporated by 
reference herein) modifies or supersedes such statement.  Any such 
statement so modified or superseded shall not be deemed to constitute a 
part hereof, except as so modified or superseded.  

The Company will furnish without charge to each person, including 
any beneficial owner, to whom this Prospectus is delivered, on the 
written or oral request of such person, a copy of any or all of the 
documents incorporated by reference, other than exhibits to such 
documents.  Requests should be directed to Chief Financial Officer, 
KeraVision, Inc., 48630 Milmont Drive, Fremont, California 94538, 
telephone: (510) 353-3000.

                          THE COMPANY

        The Company was founded in 1986 to develop and commercialize 
proprietary medical products for the treatment of common vision 
problems, including myopia (nearsightedness), hyperopia (farsightedness) 
and astigmatism, which in the aggregate are believed to affect one-half 
of the world's population.  The Company's initial product, the 
KeraVision Ring, is designed to reduce or eliminate the need for 
eyeglasses or contact lenses to correct myopia by reshaping the 
curvature of the cornea of the eye.  The KeraVision Ring is composed of 
two thin, half-circles that are inserted into the periphery of the 
cornea in a simple outpatient procedure.  The KeraVision Ring is made 
from a common polymer that has been commonly used in intraocular lenses 
for cataract surgery since 1952. The KeraVision Ring is designed to be 
permanent; however, it can be removed if desired, resulting in a 
potentially reversible refractive procedure.  The currently available 
refractive surgery procedures typically require irreversible cutting or 
tissue removal in the central cornea.  In addition to being reversible, 
other benefits of the KeraVision Ring are expected to include (i) long-
term, convenient correction, (ii) rapid visual recovery, (iii) 
predictable results, (iv) a simple, minimally-invasive, out-patient 
procedure and (v) a standardized procedure.

        The Company's objective is to commercialize the KeraVision Ring 
technology for the treatment of common vision problems on a worldwide 
basis.  In the United States, the Company is currently conducting a 
Phase III clinical trial for the treatment of mild myopia (-1.0 to -3.5 
diopters).  Preliminary results from this clinical trial indicate that 
97% of the patients achieved 20/40 or better vision, the legal 
requirement in most states to obtain a driver's license without 
corrective lenses.  To date, the KeraVision Ring has been well tolerated 
in patients.  The Company intends to submit a pre-market approval 
("PMA") application to the FDA in 1998 to allow for the 
commercialization of the KeraVision Ring in the U.S. market.

        The Company has recently begun enrollment for the expanded Phase 
III trial for myopia in the range of -3.5 to -5.0 diopters and myopia in 
the range of  -0.5 to -1.0 diopters.

        The Company received approval to affix the CE mark and begin 
commercialization in the European Union on the KeraVision Ring for both 
mild and moderate myopia in late November 1996.  To date, the Company 
has primarily concentrated its selling efforts for the KeraVision Ring 
and related instruments in France and Germany.  The Company recently 
received approval to market its product in Canada.

        In April 1997, the Company began a feasibility study outside the 
United States using KeraVision Ring technology for the treatment of 
hyperopia.  In addition, the Company continues its research and analysis 
for the application of the KeraVision Ring technology for the treatment 
of astigmatism and other common vision problems.

        The Company's principal executive offices are located in Fremont, 
California. The mailing address and telephone number are: 48630 Milmont 
Drive, Fremont, California 94538, telephone: (510) 353-3000.

                                RISK FACTORS

Prospective purchasers of the Common Stock offered hereby should 
carefully consider the following Risk Factors in addition to the other 
information appearing in or incorporated by reference into this 
Prospectus.  Statements in this "Risk Factor" section regarding 
expectations or future events and certain sections of documents 
incorporated by reference (identified with more particularity in such 
documents) may contain forward-looking statements within the meaning of 
Section 27A of the Securities Act of 1933, as amended, and Section21E of 
the Securities Exchange Act of 1934, as amended.  All forward-looking 
statements included in this document and incorporated by reference are 
based on information available to the Company on the date hereof, and 
the Company assumes no obligation to update any such forward-looking 
statements.  Actual results could differ materially from those projected 
in the forward-looking statements as a result of the factors set forth 
below and elsewhere in this document and in any documents incorporated 
by reference.

Early Stage of Product Development; Operating Losses; Uncertainty of 
Product Development and Future Revenue

        KeraVision, founded in 1986, has only recently completed 
development of one product for sale in Europe, has generated only 
limited revenues to date and is continuing to develop its products for 
the United States market.  Accordingly, the Company is subject to the 
uncertainties and risks associated with any company developing products 
and beginning its sales efforts.  The Company has experienced 
significant operating losses every year since its incorporation.  Such 
losses have resulted principally from costs incurred in research and 
development and clinical trials for the KeraVision Ring.  The Company 
expects to incur substantial and increasing operating losses for at 
least the next year and until sufficient revenue and margin can be 
generated to offset expenses.  The amount of net losses and the time 
required by the Company to reach profitability are highly uncertain.  
There can be no assurance that the Company will be able to generate 
product revenue or achieve profitability on a sustained basis or at all.

        To obtain significant revenues, the Company, alone or with others, 
must successfully develop, obtain regulatory approval for, manufacture 
and market products.  The time frame for achievement of market success 
for any products and potential products is long and uncertain.  The 
KeraVision Ring will require additional clinical studies and significant 
investment of capital prior to commercialization in the United States.  
Although the Company has received approval to market one product in the 
European Union and Canada, there can be no assurance that the Company's 
research and development efforts will be successfully completed and 
there can be no assurance that the KeraVision Ring will perform in the 
manner anticipated, or that results observed in clinical trials will be 
experienced in long-term use of the KeraVision Ring.  There can be no 
assurance that the KeraVision Ring will prove to be safe or effective 
over the long term in correcting vision, that the product will be 
approved for marketing by the FDA or any other government agency or that 
the KeraVision Ring or any other product developed by the Company will 
be commercially successful.

Government Regulation and Need for Product Approvals

        The research, manufacture, sale and distribution of medical 
devices such as the KeraVision Ring is subject to regulations imposed by 
numerous governmental authorities, principally the FDA and corresponding 
state and foreign agencies.  The regulatory process is lengthy, 
expensive and uncertain.  Prior to commercial sale in the United States, 
most medical devices, including the Company's KeraVision Ring, must be 
cleared or approved by the FDA.  Securing FDA approvals and clearances 
will require the submission to the FDA of extensive clinical data and 
supporting information.  Current FDA enforcement policy strictly 
prohibits the marketing of medical devices for uses other than those for 
which the product has been approved or cleared.  Product approvals and 
clearances can be withdrawn for failure to comply with regulatory 
standards or the occurrence of unforeseen problems following initial 
marketing.  FDA approval will be required for commencement of any 
additional clinical studies for other product indications, which must be 
conducted prior to applying for FDA approval to market the KeraVision 
Ring in the United States.  Although the Company believes that it will 
submit a PMA application to the FDA in mid-1998, there can be no 
assurance that such submission will be timely made by the Company or 
accepted by the FDA for filing.  Failure to obtain required FDA or non-
European regulatory agency approvals would prevent the Company from 
marketing the KeraVision Ring in the jurisdiction regulated by such 
agency.

        Significant unforeseen delays in the approval process could occur 
as a result of determinations by the FDA that the clinical data 
collected are insufficient to support the safety and efficacy of one or 
more of the devices for their intended uses, the FDA's failure to 
schedule advisory review panels, changes in FDA guidelines, FDA 
procedures, regulations or administrative interpretations.  Delays in 
obtaining requisite regulatory approvals, or the failure to obtain 
required clearances or approvals in the United States and other 
countries, would adversely affect or prevent the marketing of the 
KeraVision Ring, impair the Company's ability to generate funds from 
operations, and may furnish a competitive advantage to other companies 
that compete with the Company.  The Company may also be required to 
demonstrate that the KeraVision Ring represents an improved form of 
treatment over existing alternatives and/or that the expected benefits 
of the KeraVision Ring outweigh any of the risks associated with its 
use.  There can be no assurance that the Company will be able to obtain 
required approvals or clearances in the United States or certain foreign 
countries for the intended use of the KeraVision Ring or any other of 
its potential products.

        If the KeraVision Ring is approved for the correction of myopia, 
it may be subject to additional post-market testing and surveillance 
programs required by the regulatory agencies.  As the developer of the 
KeraVision Ring, the Company is required to meet the Quality System 
Regulation ("QSR") which includes extensive testing, control, 
documentation and other quality assurance procedures and standards.  The 
Company would be required to adhere to additional FDA requirements for 
the development and distribution of the KeraVision Ring.  The Company 
will be required to engage in extensive recordkeeping and reporting, and 
possibly to conduct extensive post-market surveillance or other device 
follow-up.  Ongoing compliance with the QSR, labeling and other 
applicable regulatory requirements are monitored through periodic 
inspections by state and federal agencies, including the FDA, and 
comparable agencies in other countries.  In addition, regulatory 
approval of devices is generally required in many foreign countries. For 
example, the Company has obtained the right to affix the CE marking to 
the KeraVision Ring in Europe.  Failure to comply with the applicable 
regulatory requirements can, among other things, result in the loss of 
the CE marking, fines, injunctions, civil penalties, suspensions or 
withdrawal of regulatory approvals, product recalls, product seizures, 
including cessation of manufacturing and sales, operating restrictions 
and criminal prosecution, and could have a material adverse effect on 
the Company's business, financial condition and results of operations.

        Sales of medical devices outside the United States are subject to 
foreign regulatory requirements that vary widely from country to 
country.  The time required to obtain approvals required by foreign 
countries may be longer or shorter than that required for FDA approval, 
and requirements for licensing may differ from FDA requirements.  Export 
sales of investigational devices that have not received FDA marketing 
approval may be subject to FDA export permit requirements.  Failure to 
comply with regulatory requirements could have a material adverse effect 
on the Company's business, financial condition and results of 
operations.

        All of the above described government regulation and product 
approval risks will apply to the KeraVision Ring and any future 
potential product of the Company.  Government regulation may become more 
restrictive in the future.  There can be no assurance that the Company 
will not be required to incur significant costs to comply with such laws 
and regulations in the future or that such laws and regulations will not 
have a material adverse effect upon the Company's ability to conduct 
business.

Need for Market Acceptance of the KeraVision Ring and Other Products; 
Limitations on Potential Market

        The Company's future performance will depend to a substantial 
degree upon market acceptance of, and the Company's ability to 
successfully manufacture, market, deliver and support, the KeraVision 
Ring and related products.  The extent of, and rate at which, market 
acceptance and penetration are achieved by the KeraVision Ring and 
future products is a function of many variables including, but not 
limited to, price, safety, efficacy, reliability and marketing and sales 
efforts, as well as general economic conditions affecting purchasing 
patterns.

        To be successful, the Company's KeraVision Ring will have to be 
accepted by ophthalmic surgeons as well as patients.  To date, the 
Company's product has been sold primarily in France and Germany, and has 
thus far received only limited acceptance and generated only limited 
revenues.  Many surgeons in these countries and throughout the world may 
have already invested significant time and resources in developing 
expertise in other corrective ophthalmic surgical techniques, and there 
are currently no implantable corneal devices being marketed and sold to 
treat refractive problems.  Accordingly, there can be no assurance that 
the KeraVision Ring or any future product will achieve or maintain 
acceptance in their target markets.  Similar risks may confront other 
products developed by the Company in the future.

        The Company's target market is limited to patients who have mild 
to moderate myopia without significant astigmatism and there can be no 
assurance that even this target population will prefer refractive 
surgery to current and future alternatives for visual correction.  In 
addition to the degree of myopia, the Company believes that the 
potential market for the KeraVision Ring may be further limited by the 
inability of some patients to afford the procedure and the psychological 
aversion of some patients to refractive surgery.  The Company also 
expects that the market will be affected by the relative attractiveness 
and affordability of other refractive surgical techniques.

Lack of Long-Term Follow-Up Data; Complications and Visual Side Effects

        The KeraVision Ring technology is relatively new technology.  The 
Company has therefore developed only limited clinical data to date on 
the safety and efficacy of the KeraVision Ring in correcting myopia, and 
has not yet developed any long-term safety or efficacy data.  The first 
procedure for the treatment of myopia using the KeraVision Ring was 
performed in 1991, and to date only 1,371 procedures (excluding 
commercial procedures conducted in Europe) have been conducted.  The 
KeraVision Ring is in United States Phase II and Phase III clinical 
trials, and it cannot yet be determined if the KeraVision Ring will 
prove to be effective for the predictable treatment of myopia.  There 
can be no assurance that the clinical trial results are necessarily 
indicative of long-term results that will be achieved with the 
KeraVision Ring in terms of both safety and efficacy.

        All surgical procedures, including the KeraVision Ring procedure, 
involve some inherent risk of complications.  Certain complications have 
been observed in a small number of patients who have received the 
KeraVision Ring, but no patient has suffered any serious or lasting 
injury to the eye or any material loss of either uncorrected or best 
corrected visual acuity.  The complications include, among other things:  
induced astigmatism, infection, decentered placement and a temporary 
reduction in central corneal sensation.  In addition, patients 
undergoing the KeraVision Ring procedure have reported certain visual 
side effects.  These include glare, haloes and other visual symptoms.  
Although the Company believes these complications and visual side 
effects have been observed in other ophthalmic surgeries and that the 
KeraVision Ring complications and visual side effects may be mitigated, 
no assurance can be given that these or other complications or side 
effects will not be serious or lasting or will not impair or preclude 
the Company from obtaining regulatory approval for its potential 
products or the acceptance of the product by patients or 
ophthalmologists.

Reliance on a Single Product

        The Company has concentrated its efforts primarily on the 
development of the KeraVision Ring for the correction of myopia and will 
be dependent upon the successful development of that product to generate 
revenues.  The Company has performed only limited research on other 
applications of the KeraVision Ring technology.  There can be no 
assurance that the KeraVision Ring technology will prove safe and 
effective in vision correction, or that if proven safe and effective, 
the technology will be successfully commercialized.

Dependence on Patents and Proprietary Technology

        The Company has depended and will continue to depend substantially 
on its technological expertise in the development and manufacture of the 
KeraVision Ring and any other potential products.  In addition, the 
commercial success of the Company will depend in part on acquiring and 
maintaining patent and trade secret protection with respect to the 
KeraVision Ring technology, the KeraVision Ring and any other potential 
products the Company seeks to develop.  The Company currently has 180 
pending patent applications worldwide and has been awarded 18 United 
States patents and 24 foreign patents.  There can be no assurance that 
the Company will be successful in obtaining necessary patents or license 
rights, that the Company's patent applications will result in the 
issuance of patents, that the Company will develop additional 
proprietary technology that is patentable, that any issued patents will 
provide the Company with any competitive advantages or will withstand 
challenges by third parties or that patents of others will not have an 
adverse effect on the Company.  A large company with refractive surgery 
products and substantial resources holds a United States patent covering 
a method for changing the curvature of the cornea by inserting a solid 
ring in the cornea.  Because this method requires the use of a solid 
ring, it necessitates a continuous 360 degree incision around the entire 
central zone of the cornea.  A major United States university holds two 
United States patents, one issued in 1992 and the other in 1994, 
covering a method for changing the curvature of the cornea by injecting 
hydrogel material into separated layers of the corneal tissue.  The 
Company believes the university may be seeking to commercialize this 
technology.  The Company does not believe it is infringing any of such 
patents.  Except as noted above, the Company is not aware of any other 
commercial entity involved in intrastromal KeraVision Ring development, 
although it is aware of ongoing academic research on both solid and 
injectable forms of corneal inserts.  There can be no assurance that 
others will not independently develop similar products, duplicate the 
Company's products or design products that circumvent any patents used 
by the Company.  No assurance can be given that the Company's processes 
or products will not infringe patents or proprietary rights of others or 
that any licenses required under any such patents or proprietary rights 
would be made available on terms acceptable to the Company, if at all.  
If the Company does not obtain such licenses, it could encounter delays 
in product introductions while it attempts to design around such 
patents, or it could find that the development, manufacture or sale of 
products requiring such licenses could be enjoined.  In addition, the 
Company could incur substantial costs in defending itself in suits 
brought against the Company on such patents or in bringing suits to 
protect the Company's patents against infringement.  If the outcome of 
any such litigation is adverse to the Company, the Company's business 
could be adversely affected.  To determine the priority of inventions, 
the Company may have to participate in proceedings before the U.S. 
Patent and Trademark Office, which could result in substantial cost to 
the Company and/or be decided adversely to the Company.  The Company 
currently is a party in an interference to determine the priority of 
inventions relating to technology for forming corneal channels in which 
an implant or implants may be placed.  No assurances can be made that 
the interference will be resolved favorable to the Company.  However, 
settlement discussions are in progress and the Company believes the 
interference may settle.

        The Company also relies on trade secrets and proprietary know-how 
which it seeks to protect by confidentiality agreements with its 
employees, consultants, investigators and advisors.  There can be no 
assurance that these agreements will not be breached, that the Company 
will have adequate remedies for any breach, or that the Company's trade 
secrets and proprietary know-how will not otherwise become known or be 
independently discovered by competitors.

Limited Sales or Marketing Experience

        The Company has only recently begun selling product in Europe, 
primarily in France and Germany, and there are no implantable corneal 
devices currently being marketed and sold to treat refractive problems.  
The Company intends to market and sell the KeraVision Ring and related 
technology through a direct sales force or a combination of a direct 
sales force and distributors in certain additional foreign countries and 
in the United States if and when required regulatory authorization is 
obtained.  Establishing sufficient marketing and sales capability will 
require significant resources.  There can be no assurance that the 
Company will be able to recruit and retain skilled sales management, 
direct salespersons or distributors, or that the Company's sales effort 
will be successful.  To the extent that the Company enters into 
distribution arrangements for the sale of its products, the Company will 
be dependent on the efforts of third parties.  There can be no assurance 
that such efforts will be successful.

International Sales and Operations Risks

        The Company is currently selling the KeraVision Ring to customers 
primarily in France and Germany.  In addition, the Company may begin 
manufacturing or operating activities outside of the United States.  A 
number of risks are inherent in international transactions.  
International sales and operations may be limited or disrupted by the 
imposition of the regulatory approval process, government controls, 
export license requirements, political instability, price controls, 
trade restrictions, changes in tariffs or difficulties in staffing and 
managing international operations.  Foreign regulatory agencies have or 
may establish product standards different from those in the United 
States and any inability to obtain foreign regulatory approvals on a 
timely basis could have an adverse effect on the Company's international 
business and its financial condition and results of operations.  
Additionally, the Company's business, financial condition and results of 
operations may be adversely affected by fluctuations in currency 
exchange rates, increases in duty rates and difficulties in obtaining 
export licenses.  The impact of future exchange rate fluctuations cannot 
be predicted adequately.  To date, the Company has not found it 
necessary to hedge the risk associated with fluctuations in exchange 
rates.  However, it is possible that the Company may undertake such 
transactions in the future.  There can be no assurance that any hedging 
techniques implemented by the Company will be successful or that the 
Company's results of operations will not be materially adversely 
affected by exchange rate fluctuations.  There can be no assurance that 
the Company will be able to successfully commercialize the KeraVision 
Ring or any future product in any foreign market.

Limited Manufacturing Experience; Dependence on Third Parties

        The Company has limited volume manufacturing capacity and 
experience in manufacturing medical devices or other products.  To be 
successful, the Company's products and potential products must be 
manufactured in commercial quantities in compliance with regulatory 
requirements at acceptable costs.  Production of commercial-scale 
quantities may involve technical challenges for the Company.  
Establishing its own manufacturing capabilities would require 
significant scale-up expenses and additions to facilities and personnel.  
The Company may consider seeking collaborative arrangements with other 
companies to manufacture certain of its products and potential products, 
including the KeraVision Ring.  In addition, the manufacturer of the 
Company's products and potential products will be subject to periodic 
inspection by regulatory authorities.  Any such operations must undergo 
QSR compliance inspections conducted by the FDA and equivalent 
inspections, such as CE mark audits, conducted by state and foreign 
officials.  There can be no assurance that the Company will be able to 
obtain necessary regulatory approvals on a timely basis or at all.  
Delays in receipt of or failure to receive such approvals or loss of 
previously received approvals would have a material adverse effect on 
the Company's business, financial condition and results of operations.  
There can be no assurance that the Company will be able to develop 
commercial-scale manufacturing capabilities at acceptable costs or enter 
into agreements with third parties with respect to these activities.  
When the Company is dependent upon third parties for the manufacture of 
its products and proposed products, then the Company's profit margins 
and its ability to develop and deliver such products on a timely basis 
may be adversely affected.  Moreover, there can be no assurance that 
such parties will adequately perform and any failures by third parties 
may delay the submission of products for regulatory approval, impair the 
Company's ability to deliver products on a timely basis, or otherwise 
impair the Company's competitive position.

Intense Competition and Rapid Technological Change

        The Company is engaged in a rapidly evolving field.  There are 
many companies, both public and private, universities and research 
laboratories engaged in activities relating to research on vision 
correction alternatives, including laser assisted in situ keratamileusis 
("LASIK"), photorefractive radial keratotomy ("PRK"), radial keratotomy 
("RK"), implantable contact lens ("ICL"), Automated Lamellar 
Keratoplasty ("ALK") and refractive intraocular lenses.  Competition 
from these companies, universities and laboratories is intense and 
expected to increase.  Two companies, Summit Technology and VISX, have 
received approval in the United States to market their products using 
PRK applications.  In addition to Summit Technology and VISX, there are 
a number of other entities that currently market and sell laser systems 
overseas for use in refractive surgery, including Aesculap-Meditec GmBH 
(Germany), Autonomous Technologies Corporation (United States), Chiron-
Technolas (Germany), LaserSight, Inc. (United States), Nidek (Japan) and 
Schwind (Germany).  Many of these companies and institutions have 
substantially greater resources, research and development staffs, 
facilities, experience in research and development, obtaining regulatory 
approval and manufacturing and marketing medical device products than 
the Company, and represent significant long-term competition for the 
Company.  In addition to those mentioned above, other recently developed 
technologies or procedures are, or may in the future be, the basis of 
competitive products.  There can be no assurance that the Company's 
competitors will not succeed in developing technologies, procedures or 
products that are more effective or economical than those being 
developed by the Company or that would render the Company's technology 
and proposed product obsolete or noncompetitive.  Furthermore, if the 
Company is permitted to commence commercial sales of products, it will 
also be competing with respect to manufacturing efficiency and marketing 
capabilities, areas in which the Company has no experience.  Finally, 
the Company intends to market its proposed products to people whose 
vision can be corrected with eyeglasses or contact lenses.  There can be 
no assurance that these persons will elect to undergo surgical insertion 
of the KeraVision Ring when such non-surgical vision-correction 
alternatives are available.

Risk of Product Liability Litigation; Potential Unavailability of 
Insurance

        The testing, manufacture, marketing and sale of medical devices 
entail the inherent risk of liability claims or product recalls.  As a 
result, the Company faces a risk of exposure to product liability claims 
and/or product recalls in the event that the use of its KeraVision Ring 
or other future potential products are alleged to have resulted in 
serious adverse effects.  In this regard, an individual who was formerly 
enrolled as a patient in one of the Company's clinical trials has filed 
a complaint alleging that he has suffered serious adverse effects due to 
his participation in such trial.  While the Company has taken, and 
intends to continue to take, what it believes are appropriate 
precautions to minimize exposure to this and other product liability 
claims, there can be no assurance that it will avoid significant 
liability.  The Company currently maintains, product liability insurance 
in the amount of $4.0 million.  There can be no assurance that adequate 
insurance coverage will continue to be available at an acceptable cost, 
if at all, before or after commercialization of any of its products.  
Consequently, a product liability claim, product recall or other claims 
with respect to uninsured liabilities or in excess of insured 
liabilities could have a material adverse effect on the business or 
financial condition of the Company.  See "Business Product Liability 
Insurance."

Future Capital Requirements and Uncertainty of Future Funding

        The Company will be required to commit substantial resources to 
conduct the research and development, clinical studies and regulatory 
activities necessary to bring any potential medical device products to 
market and to establish production, marketing and sales capabilities.  
There can be no assurance that the Company's current cash, cash 
equivalents and available-for-sale investments will be sufficient to 
fund the Company's operations to profitability or through completion of 
the current United States Phase III clinical trial for the KeraVision 
Ring for the treatment of mild myopia.  The Company will need to raise 
substantial additional funds for these purposes.  The Company may seek 
such additional funding through collaborative arrangements with 
corporate partners and through public or private debt or equity 
financings.  Any additional equity financing may be dilutive to 
stockholders, and any debt financing, if available, may involve 
restrictions on the Company's ability to pay dividends on its capital 
stock or the manner in which the Company conducts its business.  The 
Company currently has no commitments for any additional financings, and 
there can be no assurance that any such financings, if needed, will be 
available to the Company or that adequate funds for the Company's 
operations, whether from the Company's revenues, financial markets, 
collaborative or other arrangements with corporate partners or from 
other sources, will be available when needed or on terms attractive to 
the Company.  The inability to obtain sufficient funds may require the 
Company to delay, scale back or eliminate some or all of its research 
and product development programs, clinical studies and/or regulatory 
activities or to license third parties to commercialize products or 
technologies that the Company would otherwise seek to develop itself.

Dependence on Sole Source Supplier

        The raw materials used in manufacturing the KeraVision Ring and 
several instruments are currently purchased from single sources.  
Although the Company has not experienced difficulty acquiring this 
material for the manufacture of its products for clinical trials, no 
assurance can be given that interruptions in supplies will not occur in 
the future or that the Company would not have to obtain substitute 
vendors, which would require additional regulatory submissions.  Any 
such interruption of supply could have a material adverse effect on the 
Company's ability to manufacture its products which could have a 
material adverse effect on the Company's business, financial condition 
or results of operations.

Dependence on and Need for Additional Key Personnel

        The success of the Company and of its business strategy is 
dependent in large part on the ability of the Company to attract and 
retain key management, scientific and operating personnel.  Such persons 
are in high demand and are often subject to competing employment offers.  
The Company will need to develop expertise and add skilled personnel or 
retain consultants in such areas as research and development, clinical 
testing, government approvals, sales, marketing and manufacturing in the 
future.  There can be no assurance that the Company will be able to 
attract and retain the qualified personnel or develop the expertise 
needed for its business.  The Company currently has a small research and 
management group with limited operating experience.  The loss of the 
services of one or more members of the research or management group or 
the inability to hire additional personnel and develop expertise as 
needed could have a material adverse effect on the Company.

Impact of Year 2000

        Based on a recent assessment, the Company determined that it will 
be required to modify a small portion of its software so that its 
computer systems will function properly with respect to dates in the 
year 2000 and thereafter.  The Company determined that most of its 
currently employed software is already Year 2000 compliant.  The Company 
presently believes that, with the required slight modifications, the 
Year 2000 issue will not pose significant operational problems for its 
computer systems. 

        The Company has initiated communications with key suppliers to 
determine the extent to which the Company's interface systems are 
vulnerable to those third parties' failure to remediate their own Year 
2000 issues. The Company is currently communicating with suppliers and 
customers to determine their exposure to the Year 2000 issue.  There can 
be no guarantee that the systems of other companies on which the 
Company's systems rely will be converted in a timely fashion and would 
not have an adverse effect on the Company's systems.

                         USE OF PROCEEDS

The Company will not receive any proceeds from the sale of Common 
Stock by the Selling Stockholders pursuant to this registration 
statement.

                INDEMNIFICATION OF OFFICERS AND DIRECTORS

The Company's Certificate of Incorporation, as amended, limits the 
liability of directors and officers for monetary damages arising from 
breach of their fiduciary duty of care to the fullest extent permissible 
under Delaware law, provided that such liability does not arise from 
certain proscribed conduct (including intentional misconduct and breach 
of the duty of loyalty).  The Company's Bylaws further provide for 
indemnification of directors, officers, employees and corporate agents 
to the maximum extent permitted by the Delaware General Corporation Law.  
In addition, the Company has entered into indemnification agreements 
with its officers and directors and maintains director and officer 
liability insurance.

Insofar as indemnification for liabilities arising under the 
Securities Act of 1933 may be permitted to directors, officers and 
persons controlling the registrant pursuant to the foregoing provisions, 
the Company has been informed that in the opinion of the Securities and 
Exchange Commission such indemnification is against public policy as 
expressed in the Securities Act and is therefore unenforceable.

              ISSUANCE OF COMMON STOCK TO SELLING STOCKHOLDERS

On June 12, 1998, the Company issued and sold to, or to entities 
affiliated with, Sprout Group, Johnson & Johnson Development 
Corporation, GMI/DRI Investment Trust, and Special Situations Fund (the 
"Selling Stockholders"), pursuant to the terms of a Series B Convertible 
Preferred Stock Purchase Agreement, 562,500 shares of the Company's 
Series B Convertible Preferred Stock (the "Series B Shares") at $32.00 
per share.  The Series B Shares are entitled to receive quarterly 
dividends at the rate of seven percent (7%) per annum, payable, at the 
election of the Company, in either cash or additional Series B Shares, 
as described in the Certificate of Designation of Rights, Preferences 
and Privileges of Series B Convertible Preferred Stock (the "Certificate 
of Designation").  Each Series B Share is convertible into Common Stock 
at $8.00 per share.  The Series B Shares are convertible at the 
Company's option after two years if the price of the Company's Common 
Stock exceeds $16.00 per share.  The conversion rate is subject to 
adjustment in the event of certain circumstances described in the 
Certificate of Designation, including if the then-current value of the 
Common Stock is below $8.00 per share on June 12, 2000.  The Series B 
Shares are redeemable at the option of the holders after five (5) years.  
This Prospectus covers 2,565,000 shares of the Company's Common Stock 
issuable to the Selling Stockholders upon conversion of the 562,500 
Series B Shares issued and sold to the Selling Stockholders on June 12, 
1998, and 78,750 Series B Shares that may be issued to the Selling 
Stockholders as dividends in the two-year period ending on June 12, 
2000.

                     PLAN OF DISTRIBUTION

The Selling Stockholders may sell the Shares in whole or in part, 
from time to time on the over-the-counter market at prices and on terms 
prevailing at the time of any such sale.  Any such sale may be made in 
broker's transactions through broker-dealers acting as agents, in 
transactions directly with market makers or in privately negotiated 
transactions where no broker or other third party (other than the 
purchaser) is involved.  The Selling Stockholders will pay selling 
commissions or brokerage fees, if any, with respect to the sale of the 
Shares in amounts customary for the type of transaction effected.  Each 
Selling Shareholder will also pay all applicable transfer taxes and all 
fees and disbursements of counsel for such Selling Shareholder incurred 
in connection with the sale of shares.

The Selling Stockholders, and any other persons who participate in 
the sale of the Shares, may be deemed to be "Underwriters" as defined in 
the Securities Act.  Any commissions paid or any discounts or 
concessions allowed to any such persons, and any profits received on 
resale of the Shares, may be deemed to be underwriting discounts and 
commissions under the Securities Act.

The Company has agreed to maintain the effectiveness of this 
Registration Statement for a period of (2) years commencing on June 12, 
1998, or with respect to any Selling Shareholder, until such time as 
Rule 144 of the Securities Act or another similar exemption under the 
Securities Act is available for the sale of all such Selling 
Shareholder's shares during a three (3) month period without 
registration.  The Company has certain rights to refuse the sale of 
securities pursuant to this Registration Statement to prevent violation 
of the federal securities laws.  No sales may be made pursuant to this 
Prospectus after such date unless the Company amends or supplements this 
Prospectus to indicate that it has agreed to extend such period of 
effectiveness.

The Company has agreed to indemnify the Selling Stockholders 
against certain liabilities, including liabilities under the Securities 
Act.
                              SELLING STOCKHOLDERS

      The following table sets forth certain information as of July 7, 1998, 
as of which date 12,699,908 shares of the Company's Common Stock were issued
and outstanding, with respect to the Selling Stockholders.  Information with
respect to beneficial ownership is base upon information contained in filings
made by certain Selling Stockholders with the Securities and Exchange 
Commission, and information obtained from the Company's transfer agent and
certain of the Selling Stockholders.

<TABLE>
<CAPTION>
                        Shares Beneficially   Shares of      Shares Beneficially
     Name of Selling      Owned Prior         Common Srock        Owned After
     Stockholders       to the Offering(1) Offerred Hereby(1)  to the Offering(1)(2)
 -------------------  --------------------- ------------------   ---------------------
                        Number    Percent                        Number    Percent
                      ---------- ----------                   ---------- ----------
<S>                      <C>        <C>        <C>              <C>        <C>
The Sprout Group (3)     1,710,000     11.2          1,710,000          0      *
3000 Sand Hill Road                                                          
Menlo Park, California                                                       
94025                                                                        

Johnson & Johnson          427,500     2.8             427,500          0      *
Develpoment Corporation
One Johnson & Johnson
Plaza
New Brunswick, New Jersey
08933

GMI/DRI Investment Trust   142,500      *              142,500          0      *
P.O. Box 1113
Minneapolis, Minnesota
55440

Special Situtations Fund(4)   285,000     1.9             285,000          0      *
153 E 53rd Street                                                              
New York, New York 10022  
__________________________
*    Less than 1%

</TABLE>

(1)     The shares of Common Stock that are set forth in this table 
represent the number of shares of Common Stock issuable upon 
conversion of the Series B Shares issued and sold to the Selling 
Stockholders on June 12, 1998, and Series B Shares that may be 
issued to the Selling Stockholders as dividends in the two-year 
period ending on June 12, 2000.

(2)     Assumes sale of all Shares offered hereby and no other purchases 
or sales of the Company's Common Stock.  See "Plan of 
Distribution."

(3)     Includes shares held by DLJ Capital Corporation, DLJ ESC II, L.P., 
Sprout Venture Capital, L.P. and The Sprout CEO Fund, L.P.  
Kathleen D La Porte, general partner of the Sprout Group, is a 
member of the Company's Board of Directors.

(4)     Includes shares held by Special Situations Private Equity Fund, 
L.P., Special Situations Fund III, L.P. and Special Situations 
Cayman Fund, L.P.
Except as disclosed in footnote (3), no Selling Shareholder has 
had any material relationship with the Company or any of its 
predecessors or affiliates within the last three years.

                        LEGAL MATTERS  

Certain legal matters with respect to the legality of the issuance 
of the Common Stock offered hereby will be passed upon for the Company 
by Venture Law Group, A Professional Corporation, 2800 Sand Hill Road, 
Menlo Park, California 94025.  As of the date of this Registration 
Statement, certain directors of Venture Law Group beneficially own 
12,470 shares of the Registrant's Common Stock.

                        EXPERTS

The consolidated financial statements of KeraVision, Inc. 
appearing in KeraVision, Inc.'s Annual Report (Form 10-K) for the year 
ended December 31, 1997, have been audited by Ernst & Young LLP, 
independent auditors, as set forth in their report thereon included 
therein and incorporated herein by reference.  Such consolidated 
financial statements are incorporated herein by reference in reliance 
upon such report given upon the authority of such firm as experts in 
accounting and auditing.

                     ADDITIONAL INFORMATION

This Prospectus constitutes a part of the Registration Statement 
on Form S-3 (herein, together with all amendments and exhibits, referred 
to as the "Registration Statement") filed by the Company with the 
Securities and Exchange Commission (the "Commission") under the 
Securities Act.  This Prospectus does not contain all of the information 
set forth in the Registration Statement, certain parts of which are 
omitted in accordance with the rules and regulations of the Commission. 
For further information with respect to the Company and the shares of 
Common Stock offered hereby, reference is hereby made to the 
Registration Statement. Statements contained herein concerning the 
provisions of any document are not necessarily complete, and each such 
statement is qualified in its entirety by reference to the copy of such 
document filed with the Commission.

                                     PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.      Other Expenses of Issuance and Distribution

         The following table sets forth the costs and expenses payable by the
Registrant in connection with the sale and distribution of the Common
Stock being registered.  Selling commissions and brokerage fees and any 
applicable transfer taxes and fees and disbursements of counsel for the
Selling Stockholders are payable individually by the Selling Stockholders.
All amounts are estimated except the registration fee.

                                                            Amount
                                                          To Be Paid

Registration Fee.......................................       $5,958.70
Legal Fees and Expenses................................         $50,000
Accounting Fees and Expenses...........................          $5,000
Fees of Cowen & Company in connnection with the
     Private Placement and related transactions........      $1,300,000
         Total.........................................   $1,360,958.70

Item 15.  Indemnification of Directors and Officers

            INDEMNIFICATION OF OFFICERS AND DIRECTORS

The Company's Certificate of Incorporation, as amended, limits the 
liability of directors and officers for monetary damages arising from 
breach of their fiduciary duty of care to the fullest extent permissible 
under Delaware law, provided that such liability does not arise from 
certain proscribed conduct (including intentional misconduct and breach 
of the duty of loyalty).  The Company's Bylaws further provide for 
indemnification of directors, officers, employees and corporate agents 
to the maximum extent permitted by the Delaware General Corporation Law.  
In addition, the Company has entered into indemnification agreements 
with its officers and directors and maintains director and officer 
liability insurance.

Insofar as indemnification for liabilities arising under the 
Securities Act of 1933 may be permitted to directors, officers and 
persons controlling the registrant pursuant to the foregoing provisions, 
the Company has been informed that in the opinion of the Securities and 
Exchange Commission such indemnification is against public policy as 
expressed in the Securities Act and is therefore unenforceable.

Item 16.  Exhibits  

Exhibit
Number   Description of Exhibit



3.6   Certificate of Designation of Rights, Preferences and  Privileges of
Series B Convertible Preferred Stock of  KeraVision, Inc.



5.1     Opinion of Venture Law Group, A Professional  Corporation

10.25   Series B Convertible Preferred Stock Purchase Agreement  dated as of 
        June 12, 1998

10.26   Investors' Rights Agreement dated as of June 12, 1998

23.1    Consent of Ernst & Young LLP, Independent Auditors

23.2    Consent of Counsel (included in Exhibit 5.1)

24.3    Power of Attorney (see Pages II-3 to II-4)
___________________________

Item 17.  Undertakings  

The undersigned Registrant hereby undertakes:

(1)     To file, during any period in which offers or sales are 
being made, a post-effective amendment to this Registration Statement to 
include any material information with respect to the plan of 
distribution not previously disclosed in the Registration Statement or 
any material change to such information in the Registration Statement.

(2)     That, for the purpose of determining any liability under the 
Securities Act of 1933, each such post-effective amendment shall be 
deemed to be a new registration statement relating to the securities 
offered therein, and the offering of such securities at that time shall 
be deemed to be the initial bona fide offering thereof.

(3)     To remove from registration by means of a post-effective 
amendment any of the securities being registered which remain unsold at 
the termination of the offering.

(4)     That, for purposes of determining any liability under the 
Securities Act of 1933, each filing of the Registrant's annual report 
pursuant to Section 13(a) or Section 15(d) of the Securities Exchange 
Act of 1934 (and, where applicable, each filing of an employee benefit 
plan's annual report pursuant to Section 15(d) of the Securities 
Exchange Act of 1934) that is incorporated by reference in the 
Registration Statement shall be deemed to be a new registration 
statement relating to the securities offered therein, and the offering 
of such securities at that time shall be deemed to be the initial bona 
fide offering thereof.

Insofar as indemnification for liabilities arising under the 
Securities Act of 1933 may be permitted to directors, officers and 
controlling persons of the Registrant pursuant to the provisions 
referred to in Item 15 above or otherwise, the Registrant has been 
advised that in the opinion of the Securities and Exchange Commission 
such indemnification is against public policy as expressed in the 
Securities Act of 1933 and is, therefore, unenforceable.

                            SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filling on Form S-3 and has duly caused this Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Fremont, State of California on the 13th day of
July 1998.

                                    KERAVISION, INC.


                      By:  /s/Thomas M. Loarie
                           Thomas M. Loarie
                           President, Chief Executive Officer
                           and Chairman of the Board of 
                           Directors
                           (Principal Executive Officer)

                                    POWER OF ATTORNEY

     KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature
appears below hereby constitutes and appoints, Thomas M. Loarie and Mark
Fishcher-Colbrie, and each of them acting individually, as his
attorney-in-fact, each with full power of substitution, for him in any and
all capacities, to sign any and all amendments to this Registration
Statement (including post-effective amendments), and to file  the same,
with exhibits thereto and other documents in connection therewith, with the
 Securities and Exchange Commission, hereby ratifying and confirming our
signatures as they may be signed by our said attorney to any and all
amendments to said  Registration Statement.  Pursuant to the requirements
of the Securities Act of 1933, this Registration Statement has been signed
by the following persons in the capacities and on the dates indicated:
<TABLE>
<CAPTION>
        Signature                      Capacities                    Date
- -------------------------- ----------------------------------- -----------------
<S>                        <C>                                 <C>
/s/ Thomas Loarie          President, Chief Executive Officer  July 13, 1998
- ---------------------------and Chairman of the Board of 
(Thomas M. Loarie)         Directors
                           (Principal Executive Officer)


  /s/ Mark Fischer-Colbrie Vice President, Finance and         July 13, 1998
- --------------------------- Administration, Chief Financial
  (Mark Fischer-Colbrie)   Officer, and Assistant
                           Secretary (Principal Financial
                           and Accounting Officer)


  /s/ Charles Crocker      Director                            July 13, 1998
- ---------------------------
  (Charles Crocker)


  /s/ John R. Gilbert      Director                            July 13, 1998
- ---------------------------
  (John R. Gilbert)


  /s/ Lawrence Lehmkuhl    Director                            July 13, 1998
- ---------------------------
  (Lawrence Lehmkuhl)


  /s/ Kshitij Mohan        Director                            July 13, 1998
- ---------------------------
  (Kshitij Mohan)


  /s/ Arthur M. Pappas     Director                            July 13, 1998
- ---------------------------
  (Arthur M. Pappas)


  /s/ Steven N. Weiss      Director                            July 13, 1998
- ---------------------------
  (Steven N. Weiss)

</TABLE>

KERAVISION, INC.
INDEX TO EXHIBITS


Exhibit
Number

Description of Exhibit


3.6   Certificate of Designation of Rights, Preferences and  Privileges of
      Series B Convertible Preferred Stock of  KeraVision, Inc.

5.1   Opinion of Venture Law Group, A Professional  Corporation

10.25  Series B Convertible Preferred Stock Purchase Agreement  dated as of 
       June 12, 1998

10.26   Investors' Rights Agreement dated as of June 12, 1998

23.1   Consent of Ernst & Young LLP, Independent Auditors

23.2   Consent of Counsel (included in Exhibit 5.1)

24.3   Power of Attorney (see Page II-3)




                                 EXHIBIT 3.6
CERTIFICATE  OF  DESIGNATION  OF  RIGHTS,  PREFERENCES AND  PRIVILEGES  OF
SERIES B CONVERTIBLE PREFERRED STOCK  OF KERAVISION, INC.

Pursuant to Section 151 of the General Corporation Law of the State of 
Delaware
We, Mark Fischer-Colbrie and Michael W. Hall, the Vice President, 
Finance and Administration and Chief Financial Officer and the 
Secretary, respectively, of KeraVision, Inc., a Delaware corporation 
(the "Corporation"), in accordance with the provisions of Section 103 
thereof, DO HEREBY CERTIFY:
That pursuant to the authority conferred upon the Board of 
Directors by the Certificate of Incorporation of the said Corporation, 
the Board of Directors on June 9, 1998 adopted the following resolution 
creating a series of shares of Preferred Stock designated as Series B 
Convertible Preferred Stock:
"RESOLVED, that pursuant to the authority vested in the Board of 
Directors of the corporation by the Certificate of Incorporation, the 
Board of Directors does hereby provide for the issue of a Series of 
Preferred Stock, $0.001 par value, of the Corporation, to be designated 
"Series B Convertible Preferred Stock", initially consisting of Six 
Hundred and Sixty Two Thousand Five Hundred (662,500) shares and to the 
extent that the designations, powers, preferences and relative and other 
special rights and the qualifications, limitations and restrictions of 
the Series B Convertible Preferred Stock are not stated and expressed in 
the Certificate of Incorporation, does hereby fix and herein state and 
express such designations, powers, preferences and relative and other 
special rights and the qualifications, limitations and restrictions 
thereof, as follows (all terms used herein which are defined in the 
Certificate of Incorporation shall be deemed to have the meanings 
provided therein):
Section 1.      Designation and Amount.  The shares of such series 
shall be designated as "Series B Participating Preferred Stock", par 
value $0.001 per share, and the number of shares constituting such 
series shall be Six Hundred Sixty Two Thousand and Five Hundred 
(662,500).
Section 2.      Dividends and Distributions.  Subject to the rights of 
series of Preferred Stock which may from time to time come into 
existence, the holders of shares of Series B Convertible Preferred Stock 
shall be entitled to receive dividends, out of any assets legally 
available therefor, prior and in preference to any declaration or 
payment of any dividend (payable other than in Common Stock or other 
securities and rights convertible into or entitling the holder thereof 
to receive, directly or indirectly, additional shares of Common Stock of 
the Corporation) on the Common Stock of the Corporation, payable on the 
last day of the Corporation's fiscal quarter in which any dividend is 
declared, when, as and if declared by the Board of Directors, at the 
rate of $2.24 per share (as adjusted for stock splits and combinations) 
per annum, payable, at the election of the Corporation, in either cash 
or shares of Series B Convertible Preferred Stock, the number of shares 
of which shall equal the amount of any such dividend divided by the 
product of (i) the average closing price of the Company's Common Stock 
on the Nasdaq National Market for each of the twenty (20) trading days 
prior to the declaration of such dividend multiplied by (ii) four (4).  
Such dividends shall accrue on each share from June 12, 1998 and shall 
accrue from day to day, whether or not earned or declared.  Such 
dividends shall be paid as soon as practicable at the end of each 
quarter in either cash or shares of Series B Convertible Preferred Stock 
as described above.  Without limiting the foregoing, such dividends 
shall be cumulative so that, if such dividends in respect of any current 
quarterly dividend period, at the annual rate specified above, shall not 
have been paid the deficiency shall first be fully paid before any 
dividend or other distribution shall be paid on or declared and set 
apart for the Common Stock.  Any accumulation of dividends on the 
Series B Convertible Preferred Stock shall not bear interest.  
Cumulative dividends with respect to a share of Series B Convertible 
Preferred Stock which are accrued, payable and/or in arrears shall, upon 
conversion of such share to Common Stock, subject to the rights of 
series of Preferred Stock which may from time to time come into 
existence, be paid to the extent assets are legally available therefor 
and any amounts for which assets are not legally available shall be paid 
promptly as assets become legally available therefor; any partial 
payment will be made pro rata among the holders of such shares.  In the 
event that the holders of the Corporation's Common Stock are entitled to 
receive any dividend (payable other than in Common Stock or other 
securities and rights convertible into or entitling the holder thereof 
to receive, directly or indirectly, additional shares of Common Stock of 
the Corporation), the holders of Series B Convertible Preferred Stock 
shall be entitled to receive such dividend as if the shares of Series B 
Convertible Preferred Stock had converted to Common Stock immediately 
prior to the declaration of such dividend.
Section 3.      Liquidation and Merger Preference.
(A)     Liquidation, Dissolution or Winding Up.  Upon any 
liquidation (voluntary or otherwise), dissolution or winding up of the 
Corporation (a "Liquidation"), no distribution shall be made to the 
holders of shares of stock ranking junior (either as to dividends or 
upon liquidation, dissolution or winding up) to the Series B Convertible 
Preferred Stock unless, prior thereto, the holders of shares of Series B 
Convertible Preferred Stock shall have received an amount equal to 
accrued and unpaid dividends and distributions thereon (the "Accrued 
Dividends"), whether or not declared, to the date of such payment, plus 
an amount equal to $32 per share (as adjusted for stock splits and 
combinations) and, in the event such payment is made on or before June 
12, 2000, an amount equal to $4.48 per share, less (i) the Accrued 
Dividends and (ii) dividends previously paid pursuant to Section 2 above 
(other than pursuant to the last sentence of Section 2), provided that, 
in the event of a Change in Control (as defined in Section 3(B)(i) 
below) in which the value of the consideration received by the holders 
of the Common Stock of the Corporation exceeds $16 per share (as 
adjusted for stock splits and combinations and as determined pursuant to 
Section 3(B)(ii) below), then the holders of Preferred Stock shall 
receive only the Accrued Dividends plus $32 per share (as adjusted for 
stock splits and combinations), and provided further that in the event 
the Corporation does not have sufficient assets, subject to the rights 
of series of Preferred Stock which may from time to time come into 
existence, the amount required to be paid under this Section 3 shall 
equal the value of the amount of available assets divided by the number 
of outstanding shares of Series B Convertible Preferred Stock (the 
"Series B Liquidation Preference").
(B)     Certain Acquisitions.
(i)     Deemed Liquidation.  For purposes of this 
Section 3, a Liquidation shall be deemed to occur if the Corporation 
shall sell, convey, or otherwise dispose of or encumber all or 
substantially all of its property or business or merge into or 
consolidate with any other corporation (other than a wholly-owned 
subsidiary corporation) or effect any other transaction or series of 
related transactions that results in the transfer of fifty percent (50%) 
or more of the outstanding voting power of the Corporation or in which 
the stockholders of the Corporation immediately prior to such 
transaction or series of transactions own less than fifty percent (50%) 
of the Corporation's voting power immediately after such transaction or 
series of transactions (a "Change in Control").
(ii)    Valuation of Consideration.  In the event of a 
Change in Control, if the consideration received by the Corporation is 
other than cash, its value will be deemed its fair market value as 
determined in good faith by the Corporation's Board of Directors.  
Notwithstanding the foregoing, any securities shall be valued as 
follows:
(A)     Securities not subject to investment 
letter or other similar restrictions on free marketability:
(1)     If traded on a securities exchange 
or The Nasdaq National Market, the value shall be deemed to be the 
average of the closing prices of the securities on such exchange over 
the thirty (30) day period ending three (3) days prior to the closing;
(2)     If actively traded over-the-counter, 
the value shall be deemed to be the average of the closing bid or sale 
prices (whichever is applicable) over the thirty (30) day period ending 
three (3) days prior to the closing; and
(3)     If there is no active public market, 
the value shall be the fair market value thereof, as determined in good 
faith by the Corporation's Board of Directors.
(B)     The method of valuation of securities 
subject to investment letter or other restrictions on free marketability 
(other than restrictions arising solely by virtue of a stockholder's 
status as an affiliate or former affiliate) shall be to make an 
appropriate discount from the market value determined as above in 
Section 3(B)(ii)(A) to reflect the approximate fair market value 
thereof, as determined in good faith by the Corporation's Board of 
Directors.
(iii)   Notice of Transaction.  The Corporation shall 
give each holder of record of Series B Convertible Preferred Stock 
written notice of such impending transaction not later than ten business 
(10) days prior to the stockholders' meeting called to approve such 
transaction, or ten business (10) days prior to the closing of such 
transaction, whichever is earlier, and shall also notify such holders in 
writing of the final approval of such transaction.  The first of such 
notices shall describe the material terms and conditions of the 
impending transaction and the provisions of this Section 3, and the 
Corporation shall thereafter give such holders prompt notice of any 
material changes.  The transaction shall in no event take place sooner 
than ten business (10) days after the Corporation has given the first 
notice provided for herein or sooner than ten business (10) days after 
the Corporation has given notice of any material changes provided for 
herein; provided, however, that such periods may be shortened upon the 
written consent of the holders of Preferred Stock that are entitled to 
such notice rights or similar notice rights and that represent at least 
a majority of the voting power of all then outstanding shares of such 
Preferred Stock.
(iv)    Effect of Noncompliance.  In the event the 
requirements of this Section 3(B) are not complied with, the Corporation 
shall forthwith either cause the closing of the transaction to be 
postponed until such requirements have been complied with, or cancel 
such transaction, in which event the rights, preferences and privileges 
of the holders of the Series B Convertible Preferred Stock shall revert 
to and be the same as such rights, preferences and privileges existing 
immediately prior to the closing of the transaction.
Section 4.      Conversion.  The holders of the Series B Convertible 
Preferred Stock shall have conversion rights as follows (the "Conversion 
Rights"):
(A)     Right to Convert.  Subject to Section 4(C), each share 
of Series B Convertible Preferred Stock shall be convertible, at the 
option of the holder thereof, at any time after the date of issuance of 
such share, at the office of the Corporation or any transfer agent for 
such stock, into such number of fully paid and nonassessable shares of 
Common Stock as is determined by dividing $32.00 by the Conversion Price 
applicable to such share, determined as hereafter provided, in effect on 
the date the certificate is surrendered for conversion.  The initial 
Conversion Price per share of Series B Convertible Preferred Stock shall 
be set as of the earlier of (i) June 12, 2000 (the "Anniversary Date"), 
upon written request by the holders of a majority of the outstanding 
Series B Convertible Preferred Stock on or before July 10, 2000, (ii) 
the date immediately preceding a Liquidation or Change of Control prior 
to the Anniversary Date as defined herein (the "Liquidation Date"), 
(iii) the date the holder thereof elects to convert such Series B 
Convertible Preferred Stock or (iv) the date the Corporation elects to 
convert such Series B Convertible Preferred Stock pursuant to Section 
4(B) below.  The initial Conversion Price shall be the lower of (i) 
$8.00, or (ii) if the price is set as of the Anniversary Date or the 
Liquidation Date, the average closing price of shares of the 
Corporation's Common Stock on the Nasdaq National Market (or equivalent 
exchange) for each of the first five (5) and last five (5) trading days 
of the three (3) months immediately prior to such date, subject to 
adjustment as set forth in Section 4(D) without regard to whether the 
event giving rise to such adjustment occurs prior to or after the time 
at which the initial Conversion Price is set. 
(B)     Automatic Conversion.  Each share of Series B 
Convertible Preferred Stock shall be converted, at the election of the 
Corporation, into shares of Common Stock at the Conversion Price at the 
time in effect for such share at any time after June 12, 2000, if at the 
time of such election the average closing price per share of the 
Corporation's Common Stock on the Nasdaq National Market (or equivalent 
exchange) for the immediately preceding twenty (20) consecutive trading 
days exceeds $16 per share (as adjusted for stock splits and 
combinations).
(C)     Mechanics of Conversion.  Before any holder of Series 
B Convertible Preferred Stock shall be entitled to convert the same into 
shares of Common Stock, such holder shall surrender the certificate or 
certificates therefor, duly endorsed, at the office of the Corporation 
or of any transfer agent for the Series B Convertible Preferred Stock, 
and shall give written notice to the Corporation at its principal 
corporate office, of the election to convert the same and shall state 
therein the name or names in which the certificate or certificates for 
shares of Common Stock are to be issued.  The Corporation shall, as soon 
as practicable thereafter, issue and deliver at such office to such 
holder of Series B Convertible Preferred Stock, or to the nominee or 
nominees of such holder, a certificate or certificates for the number of 
shares of Common Stock to which such holder shall be entitled as 
aforesaid.  Such conversion shall be deemed to have been made 
immediately prior to the close of business (i) on the date of such 
surrender of the shares of  such series of Preferred Stock to be 
converted or (ii) in case of a conversion pursuant to Section 4(B), on 
the date the Corporation delivers notice of its intent to effect an 
automatic conversion pursuant to Section 4(B).  The person or persons 
entitled to receive the shares of Common Stock issuable upon such 
conversion shall be treated for all purposes as the record holder or 
holders of such shares of Common Stock as of such date.
(D)     Conversion Price Adjustments of Preferred Stock for 
Certain Dilutive Issuances, Splits and Combinations.  The Conversion 
Price of the Series B Convertible Preferred Stock shall be subject to 
adjustment from time to time as follows:
(i)     Issuance of Additional Stock below Purchase 
Price.  If the Corporation shall issue, after the date upon which any 
shares of Series B Convertible Preferred Stock were first issued (the 
"Purchase Date"), any Additional Stock (as defined below) without 
consideration or for a consideration per share less than the Conversion 
Price for such Series B Convertible Preferred Stock in effect 
immediately prior to the issuance of such Additional Stock, the 
Conversion Price for such Series B Convertible Preferred Stock in effect 
immediately prior to each such issuance shall automatically be adjusted 
as set forth in this Section 4(D)(i), unless otherwise provided in this 
Section 4(D)(i).
(A)     Adjustment Formula.  Whenever the 
Conversion Price is adjusted pursuant to this Section 4(D)(i), the new 
Conversion Price shall be determined by multiplying the Conversion Price 
then in effect by a fraction, (x) the numerator of which shall be the 
number of shares of Common Stock outstanding immediately prior to such 
issuance (the "Outstanding Common") plus the number of shares of Common 
Stock that the aggregate consideration received by the Corporation for 
such issuance would purchase at such Conversion Price then in effect for 
such series; and (y) the denominator of which shall be the number of 
shares of Outstanding Common plus the number of shares of such 
Additional Stock.  For purposes of the foregoing calculation, the term 
"Outstanding Common" shall include shares of Common Stock deemed issued 
pursuant to Section 4(D)(i)(E) below.
(B)     Definition of "Additional Stock".  For 
purposes of this Section 4(D)(i), "Additional Stock" shall mean any 
shares of Common Stock issued (or deemed to have been issued pursuant to 
Section 4(D)(i)(E)) by the Corporation after the Purchase Date) other 
than 
(1)     Common Stock issued pursuant to a 
transaction described in Section 4(D)(iii) hereof, 
(2)     Shares of Common Stock issuable or 
issued to employees, consultants or directors of the Corporation 
directly or pursuant to stock option plans or restricted stock plans 
approved by the Board of Directors of the Corporation,
(3)     Capital stock, or options or 
warrants to purchase capital stock, issued to financial institutions or 
lessors in connection with commercial credit arrangements, equipment 
financings or similar transactions,
(4)     Shares of Common Stock or Preferred 
Stock issuable upon exercise of warrants outstanding as of Purchase 
Date,
(5)     Capital stock or warrants or options 
to purchase capital stock issued in connection with bona fide 
acquisitions, mergers or similar transactions, the terms of which are 
approved by the Board of Directors of the Corporation, and
(6)     Shares of Common Stock issued or 
issuable upon conversion of the Series B Convertible Preferred Stock.
(C)  No Fractional Adjustments.  No adjustment 
of the Conversion Price for the Series B Convertible Preferred Stock 
shall be made in an amount less than one cent per share, provided that 
any adjustments which are not required to be made by reason of this 
sentence shall be carried forward and shall be either taken into account 
in any subsequent adjustment made prior to three years from the date of 
the event giving rise to the adjustment being carried forward, or shall 
be made at the end of three years from the date of the event giving rise 
to the adjustment being carried forward.
(D)     Determination of Consideration. In the 
case of the issuance of Common Stock for cash, the consideration shall 
be deemed to be the amount of cash paid therefor before deducting any 
reasonable discounts, commissions or other expenses allowed, paid or 
incurred by the Corporation for any underwriting or otherwise in 
connection with the issuance and sale thereof.   In the case of the 
issuance of the Common Stock for a consideration in whole or in part 
other than cash, the consideration other than cash shall be deemed to be 
the fair value thereof as determined in good faith by the Board of 
Directors irrespective of any accounting treatment.
(E)     Deemed Issuances of Common Stock.  In the 
case of the issuance (whether before, on or after the applicable 
Purchase Date) of options to purchase or rights to subscribe for Common 
Stock, securities by their terms convertible into or exchangeable for 
Common Stock or options to purchase or rights to subscribe for such 
convertible or exchangeable securities, the following provisions shall 
apply for all purposes of this Section 4(D)(i):
(1)     The aggregate maximum number of 
shares of Common Stock deliverable upon exercise (assuming the 
satisfaction of any conditions to exercisability, including without 
limitation, the passage of time, but without taking into account 
potential antidilution adjustments) of such options to purchase or 
rights to subscribe for Common Stock shall be deemed to have been issued 
at the time such options or rights were issued and for a consideration 
equal to the consideration (determined in the manner provided in Section 
4(D)(i)(D)), if any, received by the Corporation upon the issuance of 
such options or rights plus the minimum exercise price provided in such 
options or rights (without taking into account potential antidilution 
adjustments) for the Common Stock covered thereby.
(2)     The aggregate maximum number of 
shares of Common Stock deliverable upon conversion of or in exchange 
(assuming the satisfaction of any conditions to convertibility or 
exchangeability, including, without limitation, the passage of time, but 
without taking into account potential antidilution adjustments) for any 
such convertible or exchangeable securities or upon the exercise of 
options to purchase or rights to subscribe for such convertible or 
exchangeable securities and subsequent conversion or exchange thereof 
shall be deemed to have been issued at the time such securities were 
issued or such options or rights were issued and for a consideration 
equal to the consideration, if any, received by the Corporation for any 
such securities and related options or rights (excluding any cash 
received on account of accrued interest or accrued dividends), plus the 
minimum additional consideration, if any, to be received by the 
Corporation (without taking into account potential antidilution 
adjustments) upon the conversion or exchange of such securities or the 
exercise of any related options or rights (the consideration in each 
case to be determined in the manner provided in Section 4(D)(i)(D)).
(3)     In the event of any change in the 
number of shares of Common Stock deliverable or in the consideration 
payable to the Corporation upon exercise of such options or rights or 
upon conversion of or in exchange for such convertible or exchangeable 
securities, including, but not limited to, a change resulting from the 
antidilution provisions thereof, the Conversion Price of the Series B 
Convertible Preferred Stock, to the extent in any way affected by or 
computed using such options, rights or securities, shall be recomputed 
to reflect such change, but no further adjustment shall be made for the 
actual issuance of Common Stock or any payment of such consideration 
upon the exercise of any such options or rights or the conversion or 
exchange of such securities.
(4)     Upon the expiration of any such 
options or rights, the termination of any such rights to convert or 
exchange or the expiration of any options or rights related to such 
convertible or exchangeable securities, the Conversion Price of the 
Series B Convertible Preferred Stock, to the extent in any way affected 
by or computed using such options, rights or securities or options or 
rights related to such securities, shall be recomputed to reflect the 
issuance of only the number of shares of Common Stock (and convertible 
or exchangeable securities which remain in effect) actually issued upon 
the exercise of such options or rights, upon the conversion or exchange 
of such securities or upon the exercise of the options or rights related 
to such securities.
(5)     The number of shares of Common Stock 
deemed issued and the consideration deemed paid therefor pursuant to 
Sections 4(D)(i)(E)(1) and 4(D)(i)(E)(2) shall be appropriately adjusted 
to reflect any change, termination or expiration of the type described 
in either Section 4(D)(i)(E)(3) or 4(D)(i)(E)(4).
(F)     No Increased Conversion Price.  
Notwithstanding any other provisions of this Section 4(D)(i), except to 
the limited extent provided for in Sections 4(D)(i)(E)(3) and 
4(D)(i)(E)(4), no adjustment of the Conversion Price pursuant to this 
Section 4(D)(i) shall have the effect of increasing the Conversion Price 
above the Conversion Price in effect immediately prior to such 
adjustment.
(ii)    Stock Splits and Dividends.  In the event the 
Corporation should at any time or from time to time after the Purchase 
Date fix a record date for the effectuation of a split or subdivision of 
the outstanding shares of Common Stock or the determination of holders 
of Common Stock entitled to receive a dividend or other distribution 
payable in additional shares of Common Stock or other securities or 
rights convertible into, or entitling the holder thereof to receive 
directly or indirectly, additional shares of Common Stock (hereinafter 
referred to as "Common Stock Equivalents") without payment of any 
consideration by such holder for the additional shares of Common Stock 
or the Common Stock Equivalents (including the additional shares of 
Common Stock issuable upon conversion or exercise thereof), then, unless 
the holders of Series B Convertible Preferred Stock receive a pro rata 
portion of such dividends on a basis as if they had converted 
immediately prior to such dividend, as of such record date (or the date 
of such dividend distribution, split or subdivision if no record date is 
fixed), the Conversion Price of the Series B Convertible Preferred Stock 
shall be appropriately decreased so that the number of shares of Common 
Stock issuable on conversion of each share of such series shall be 
increased in proportion to such increase of the aggregate of shares of 
Common Stock outstanding and those issuable with respect to such Common 
Stock Equivalents with the number of shares issuable with respect to 
Common Stock Equivalents determined from time to time in the manner 
provided for deemed issuances in Section 4(D)(i)(E).
(iii)   Reverse Stock Splits.  If the number of shares 
of Common Stock outstanding at any time after the Purchase Date is 
decreased by a combination of the outstanding shares of Common Stock, 
then, following the record date of such combination, the Conversion 
Price for the Series B Convertible Preferred Stock shall be 
appropriately increased so that the number of shares of Common Stock 
issuable on conversion of each share of such series shall be decreased 
in proportion to such decrease in outstanding shares.
(E)     Other Distributions.  In the event the Corporation 
shall declare a distribution payable in securities of other persons, 
evidences of indebtedness issued by the Corporation or other persons, 
assets (excluding cash dividends) or options or rights not referred to 
in Section 4(D)(iii), then, in each such case for the purpose of this 
Section 4(E), the holders of Series B Convertible Preferred Stock shall 
be entitled to a proportionate share of any such distribution as though 
they were the holders of the number of shares of Common Stock of the 
Corporation into which their shares of Preferred Stock are convertible 
as of the record date fixed for the determination of the holders of 
Common Stock of the Corporation entitled to receive such distribution.
(F)     Recapitalizations.  If at any time or from time to 
time there shall be a recapitalization of the Common Stock (other than a 
subdivision, combination or merger or sale of assets transaction 
provided for elsewhere in Section 3 or this Section 4) provision shall 
be made so that the holders of the Series B Convertible Preferred Stock 
shall thereafter be entitled to receive upon conversion of such 
Preferred Stock the number of shares of stock or other securities or 
property of the Corporation or otherwise, to which a holder of Common 
Stock deliverable upon conversion would have been entitled on such 
recapitalization.  In any such case, appropriate adjustment shall be 
made in the application of the provisions of this Section 4 with respect 
to the rights of the holders of such Preferred Stock after the 
recapitalization to the end that the provisions of this Section 4 
(including adjustment of the Conversion Price then in effect and the 
number of shares purchasable upon conversion of such Preferred Stock) 
shall be applicable after that event and be as nearly equivalent as 
practicable to what such holder would be entitled had the 
recapitalization not been effected.
(G)     No Impairment.  The Corporation will not, by amendment 
of its Certificate of Incorporation or through any reorganization, 
recapitalization, transfer of assets, consolidation, merger, 
dissolution, issue or sale of securities or any other voluntary action, 
avoid or seek to avoid the observance or performance of any of the terms 
to be observed or performed hereunder by the Corporation, but will at 
all times in good faith assist in the carrying out of all the provisions 
of this Section 4 and in the taking of all such action as may be 
necessary or appropriate in order to protect the Conversion Rights of 
the holders of Preferred Stock against impairment.
(H)     No Fractional Shares and Certificate as to 
Adjustments.
(i)     No fractional shares shall be issued upon the 
conversion of any share or shares of the Series B Convertible Preferred 
Stock, and the number of shares of Common Stock to be issued shall be 
rounded to the nearest whole share.  The number of shares issuable upon 
such conversion shall be determined on the basis of the total number of 
shares of Series B Convertible Preferred Stock the holder is at the time 
converting into Common Stock and the number of shares of Common Stock 
issuable upon such aggregate conversion.
(ii)    Upon the occurrence of each adjustment or 
readjustment of the Conversion Price of Series B Convertible Preferred 
Stock pursuant to this Section 4, the Corporation, at its expense, shall 
promptly compute such adjustment or readjustment in accordance with the 
terms hereof and prepare and furnish to each holder of such Preferred 
Stock a certificate setting forth such adjustment or readjustment and 
showing in detail the facts upon which such adjustment or readjustment 
is based.  The Corporation shall, upon the written request at any time 
of any holder of  Series B Convertible Preferred Stock, furnish or cause 
to be furnished to such holder a like certificate setting forth (A) such 
adjustment and readjustment, (B) the Conversion Price for the Series B 
Convertible Preferred Stock at the time in effect, and (C) the number of 
shares of Common Stock and the amount, if any, of other property which 
at the time would be received upon the conversion of a share of the 
Series B Convertible Preferred Stock.
(I)     Notices of Record Date.  In the event of any taking by 
the Corporation of a record of the holders of any class of securities 
for the purpose of determining the holders thereof who are entitled to 
receive any dividend (other than a cash dividend) or other distribution, 
any right to subscribe for, purchase or otherwise acquire any shares of 
stock of any class or any other securities or property, or to receive 
any other right, the Corporation shall mail to each holder of Series B 
Convertible Preferred Stock, at least ten (10) days prior to the date 
specified therein, a notice specifying the date on which any such record 
is to be taken for the purpose of such dividend, distribution or right, 
and the amount and character of such dividend, distribution or right.
(J)     Reservation of Stock Issuable Upon Conversion.  The 
Corporation shall at all times reserve and keep available out of its 
authorized but unissued shares of Common Stock, solely for the purpose 
of effecting the conversion of the shares of the Series B Convertible 
Preferred Stock, such number of its shares of Common Stock as shall from 
time to time be sufficient to effect the conversion of all outstanding 
shares of such series of Preferred Stock; and if at any time the number 
of authorized but unissued shares of Common Stock shall not be 
sufficient to effect the conversion of all then outstanding shares of 
such series of Preferred Stock, in addition to such other remedies as 
shall be available to the holder of such Preferred Stock, the 
Corporation will take such corporate action as may, in the opinion of 
its counsel, be necessary to increase its authorized but unissued shares 
of Common Stock to such number of shares as shall be sufficient for such 
purposes, including, without limitation, engaging in best efforts to 
obtain the requisite stockholder approval of any necessary amendment to 
this Certificate of Incorporation.
(K)     Notices.  Any notice required by the provisions of 
this Section 4 to be given to the holders of shares of Series B 
Convertible Preferred Stock shall be deemed given if deposited in the 
United States mail, postage prepaid, and addressed to each holder of 
record at his address appearing on the books of the Corporation.
Section 5.      Redemption.
                (A)     Redemption Date and Price.  Subject to the rights of 
series of Preferred Stock which may from time to time come into 
existence, at any time after June 12, 2003, but on a date (the 
"Redemption Date") within thirty (30) days after receipt by the 
Corporation of a written request (a "Redemption Election") from the 
holders of not less than a majority of the then outstanding Series B 
Convertible Preferred Stock that all or some of the shares of such 
series held by such holders be redeemed, the Corporation shall, to the 
extent it may lawfully do so, redeem the number of shares specified in 
the Redemption Election and any additional shares tendered pursuant to 
Section 5(B) below in accordance with the procedures set forth in this 
Section 5 by paying in cash therefor a sum per share equal to $32 per 
share of Series B Convertible Preferred Stock (as adjusted for stock 
splits and combinations) plus all accrued but unpaid dividends on such 
shares (the "Redemption Price").

                (B)     Procedure.  Subject to the rights of series of 
Preferred Stock which may from time to time come into existence, within 
fifteen (15) days following its receipt of the Redemption Election, the 
Corporation shall mail a written notice, first class postage prepaid, to 
each holder of record (at the close of business on the business day next 
preceding the day on which notice is given) of Series B Convertible 
Preferred Stock at the address last shown on the records of the 
Corporation for such holder, notifying such holder of the redemption to 
be effected, the Redemption Date, the applicable Redemption Price, the 
place at which payment may be obtained and calling upon such holder to 
surrender to the Corporation, in the manner and at the place designated, 
such holder's certificate or certificates representing the shares that 
such holder desires to be redeemed (the "Redemption Notice").  The 
Redemption Date shall be at least seven (7) days after the date of 
mailing of the Redemption Notice.  Any holder of Series B Convertible 
Preferred Stock who has not made a Redemption Election and who wishes to 
have some or all of its shares redeemed shall provide written notice to 
the Corporation on or before three (3) days prior to the Redemption 
Date, specifying the number of shares of Series B Convertible Preferred 
such holder wishes to be redeemed.  Except as provided in Section 5(C), 
on or after the Redemption Date, each holder of Series B Convertible 
Preferred Stock to be redeemed shall surrender to the Corporation the 
certificate or certificates representing such shares, in the manner and 
at the place designated in the Redemption Notice, and thereupon the 
Redemption Price of such shares shall be payable to the order of the 
person whose name appears on such certificate or certificates as the 
owner thereof and each surrendered certificate shall be canceled.  In 
the event less than all the shares represented by any such certificate 
are redeemed, a new certificate shall be issued representing the 
unredeemed shares.

                (C)     Effect of Redemption; Insufficient Funds.  From and 
after the Redemption Date, unless there shall have been a default in 
payment of the Redemption Price, all rights of the holders of shares of 
Series B Convertible Preferred Stock designated for redemption in the 
Redemption Notice (except the right to receive the Redemption Price 
without interest upon surrender of their certificate or certificates) 
shall cease with respect to such shares, and such shares shall not 
thereafter be transferred on the books of the Corporation or be deemed 
to be outstanding for any purpose whatsoever.  Subject to the rights of 
series of Preferred Stock which may from time to time come into 
existence, if the funds of the Corporation legally available for 
redemption of shares of Series B Convertible Preferred Stock on any 
Redemption Date are insufficient to redeem the total number of shares of 
Series B Convertible Preferred Stock to be redeemed on such date, those 
funds which are legally available will be used to redeem the maximum 
possible number of such shares ratably among the holders of such shares 
to be redeemed based upon the total Redemption Price applicable to each 
such holder's shares of Series B Convertible Preferred Stock which are 
subject to redemption on such Redemption Date.  The shares of Series B 
Convertible Preferred Stock not redeemed shall remain outstanding and 
entitled to all the rights and preferences provided herein.  Subject to 
the rights of series of Preferred Stock which may from time to time come 
into existence, at any time thereafter when additional funds of the 
Corporation are legally available for the redemption of shares of 
Series B Convertible Preferred Stock, such funds will immediately be 
used to redeem the balance of the shares which the Corporation has 
become obliged to redeem on any Redemption Date but which it has not 
redeemed.
Section 6.      Voting Rights.  Except as otherwise expressly provided 
herein or by law, the holder of each share of Series B Convertible 
Preferred Stock shall have the right to one vote for each share of 
Common Stock into which such Preferred Stock could then be converted, 
and with respect to such vote, such holder shall have full voting rights 
and powers equal to the voting rights and powers of the holders of 
Common Stock, and shall be entitled, notwithstanding any provision 
hereof, to notice of any stockholders' meeting in accordance with the 
bylaws of the Corporation, and shall be entitled to vote, together with 
holders of Common Stock, with respect to any question upon which holders 
of Common Stock have the right to vote.  Fractional votes shall not, 
however, be permitted and any fractional voting rights available on an 
as-converted basis (after aggregating all shares into which shares of 
Series B Convertible Preferred Stock held by each holder could be 
converted) shall be rounded to the nearest whole number (with one-half 
being rounded upward).  Notwithstanding anything to the contrary 
contained herein, so long as 300,000 shares of Series B Convertible 
Preferred Stock remain outstanding (as adjusted for stock splits and 
combinations), the holders of a majority of the Series B Convertible 
Preferred Stock shall be entitled to elect one (1) member of the Board 
of Directors of the Corporation.
Section 7.      Protective Provisions.  Subject to the rights of 
series of Preferred Stock which may from time to time come into 
existence, so long as at least 30,000 shares of Series B Convertible 
Preferred Stock are outstanding (as adjusted for stock splits, stock 
dividends and combinations), the Corporation shall not without first 
obtaining the approval (by vote or written consent, as provided by law) 
of the holders of at least a majority of the then outstanding shares of 
Series B Convertible Preferred Stock, voting together as a class:
(A)     alter or change the rights, preferences or privileges 
of the shares of Series B Convertible Preferred Stock so as to affect 
adversely the shares of such series;
(B)     increase or decrease (other than by redemption or 
conversion) the total number of authorized shares of Series  B 
Convertible Preferred Stock;
(C)     authorize or issue, or obligate itself to issue, any 
other equity security, including any other security convertible into or 
exercisable for any equity security, having a preference over the 
Series B Convertible Preferred Stock with respect to voting, dividends 
or conversion; or
(D)     reclassify the shares of Common Stock or any other 
shares of any class of capital stock hereafter created junior to the 
Series B Convertible Preferred Stock into shares of any class or series 
of capital stock (i) ranking either as to payment of dividends, 
distributions of assets or redemptions, prior to the Series B 
Convertible Preferred Stock, or (ii) which in any manner adversely 
affects the holders of Series B Convertible Preferred Stock.
Section 8.      Reacquired Shares.  Any shares of Series B Convertible 
Preferred Stock purchased or otherwise acquired by the Corporation in 
any manner whatsoever shall be retired and canceled promptly after the 
acquisition thereof.  All such shares shall upon their cancellation 
become authorized but unissued shares of Preferred Stock and may be 
reissued as part of a new series of Preferred Stock to be created by 
resolution or resolutions of the Board of Directors, subject to the 
conditions and restrictions on issuance set forth herein.
Section 9.      Ranking.  The Series B Convertible Preferred Stock 
shall rank senior to the Corporation's Series A Preferred Stock, Common 
Stock and, unless the terms of any such class or series shall provide 
otherwise, all other classes of capital stock or series of the 
Corporation's Preferred Stock as to dividend rights, rights of 
liquidation, winding up or dissolution.
Section 10.     Amendment.  This Certificate of Designation shall not 
be amended without the affirmative vote of the holders of a majority of 
the outstanding shares of Series B Convertible Preferred Stock.

        IN WITNESS WHEREOF, we have executed and subscribed this 
Certificate and do affirm the foregoing as true under the penalties of 
perjury this 12th day of June, 1998.  

/s/Mark Fischer-Colbrie                 
Mark Fischer-Colbrie, Vice 
President,
Finance and Administration and 
Chief Financial Officer


ATTEST:

/s/Michael W. Hall              
Michael W. Hall, Secretary



EXHIBIT 5.1

VENTURE LAW GROUP
A Professional Corporation
2800 Sand Hill Road
Menlo Park, CA.  94025


July 13, 1998

KeraVision, Inc.
48630 Milmont Drive
Fremont, California 94538

        REGISTRATION STATEMENT ON FORM S-3

Ladies and Gentlemen:

We have examined the Registration Statement on Form S-3 to be 
filed by you with the Securities and Exchange Commission on or about 
July 13, 1998 (the "Registration Statement") in connection with the 
registration under the Securities Act of 1933, as amended, of a total of 
2,565,000 shares of your Common Stock (the "Shares").  As your legal 
counsel, we have examined the proceedings taken in connection with the 
sale of the shares of Series B Convertible Preferred Stock that are 
convertible into the Shares and are familiar with the proceeding 
proposed to be taken by you, and the Selling Stockholders in connection 
with the sale of the Shares under the Registration Statement.
It is our opinion that the Shares, when issued upon conversion of 
shares of Series B Convertible Preferred Stock, will be legally and 
validly issued, fully paid and nonassessable and when resold in the 
manner referred to in the Registration Statement, the Shares will be 
legally and validly issued, fully paid and nonassessable.
We consent to the use of this opinion as an exhibit to the 
Registration Statement and further consent to the use of our name 
whenever it appears in the Registration Statement and any amendments to 
it.
                                                        Sincerely,      
                                                        VENTURE LAW GROUP
                                                        A Professional 
Corporation
                                                        /s/ Venture Law Group



EXHIBIT 10.25

KERAVISION, INC.

SERIES B CONVERTIBLE PREFERRED STOCK PURCHASE AGREEMENT

June 12, 1998

TABLE OF CONTENTS
Page
1. Purchase and Sale of Preferred Stock 1
1.1 Sale and Issuance of Series A Preferred Stock       1
1.2 Closing; Delivery   1
2. Representations and Warranties of the Company        1
2.1 Organization, Good Standing and Qualification       2
2.2 Capitalization      2
2.3 Subsidiaries        3
2.4 Authorization       3
2.5 Valid Issuance of Securities        4
2.6 Governmental Consents       4
2.7 Litigation  4
2.8 SEC Documents; Financial Statements 4
2.9 Changes     5
2.10 Title to Properties        6
2.11 Tax Matters        7
2.12 No Material Defaults       8
2.13 Patents and Trademarks     8
2.14 No Conflict        8
2.15 Securities Laws    8
2.16 Business   9
2.17 Certain Regulatory Matters 9
2.18 Registration Rights        9
2.19 Disclosure 9
2.20 Solvency; No Default       9
2.21 Solvency; No Default       9
3. Representations and Warranties of the Purchasers     10
3.1 Authorization       10
3.2 Purchase Entirely for Own Account   10
3.3 Disclosure of Information   10
3.4 Restricted Securities       10
3.5 No Public Market    11
3.6 Legends     11
3.7 Accredited Investor 11
3.8 Foreign Investors   11
4. Conditions of the Purchasers' Obligations at Closing 11
4.1 Representations and Warranties      12
4.2 Performance 12
4.3 Compliance Certificate      12
4.4 Qualifications      12
4.5 Opinion of Company Counsel  12
4.6 Board of Directors  12
4.7 Investors' Rights Agreement 12
4.8 Certificate of Designation  12
5. Conditions of the Company's Obligations at Closing   12
5.1 Representations and Warranties      13
5.2 Performance 13
5.3 Qualifications      13
6. Miscellaneous        13
6.1 Survival of Warranties      13
6.2 Transfer; Successors and Assigns    13
6.3 Governing Law       13
6.4 Counterparts        13
6.5 Titles and Subtitles        13
6.6 Notices     13
6.7 Finder's Fee        14
6.8 Attorney's Fees     14
6.9 Amendments and Waivers      14
6.10 Severability       14
6.11 Delays or Omissions        15
6.12 Entire Agreement   15
6.13 Corporate Securities Law   15
6.14 Confidentiality    15
6.15 Exculpation Among Purchasers       15
6.16 Waiver of Conflicts        16
6.17 Publicity  16
6.18 Expenses; Transfer Taxes   16


KERAVISION, INC.

SERIES B CONVERTIBLE PREFERRED STOCK PURCHASE AGREEMENT

This Series B Convertible Preferred Stock Purchase Agreement (the 
"Agreement") is made as of the 12th day of June, 1998 by and between 
KeraVision, Inc., a Delaware corporation (the "Company") and the 
investors listed on Exhibit A attached hereto (each a "Purchaser" and 
together the "Purchasers").
The parties hereby agree as follows:
1.      Purchase and Sale of Preferred Stock.
1.1     Sale and Issuance of Series B Convertible Preferred 
Stock.
(a)     The Company shall adopt and file with the 
Secretary of State of the State of Delaware on or before the Closing (as 
defined below) the Certificate of Designation of Rights, Preferences and 
Privileges of Series B Convertible Preferred Stock in the form attached 
hereto as Exhibit B (the "Certificate of Designation").
(b)     Subject to the terms and conditions of this 
Agreement, each Purchaser agrees to purchase at the Closing and the 
Company agrees to sell and issue to each Purchaser at the Closing that 
number of shares of Series B Convertible Preferred Stock set forth 
opposite each such Purchaser's name on Exhibit A attached hereto at a 
purchase price of $32.00 per share.  The shares of Series B Convertible 
Preferred Stock issued to the Purchaser pursuant to this Agreement shall 
be hereinafter referred to as the "Stock."
1.2     Closing; Delivery.
(a)     The purchase and sale of the Stock shall take 
place at the offices of Venture Law Group, 2800 Sand Hill Road, Menlo 
Park, California, at 10:00 a.m., on June 12, 1998, or at such other time 
and place as the Company and the Purchasers mutually agree upon, orally 
or in writing (which time and place are designated as the "Closing").
(b)     At the Closing, the Company shall deliver to 
each Purchaser a certificate, registered in such Purchaser's name, 
representing the Stock being purchased thereby against payment of the 
purchase price therefor by wire transfer to the Company's designated 
account or certified or cashier's check drawn on a United States bank 
made payable to the order of KeraVision, Inc.
2.      Representations and Warranties of the Company.  The Company 
hereby represents and warrants to each Purchaser that, except as 
expressly indicated on a Schedule of Exceptions attached hereto as 
Exhibit C (the "Schedule of Exceptions"), which exceptions shall be 
deemed to be representations and warranties as if made hereunder:
2.1     Organization, Good Standing and Qualification.  Each of the 
Company and its subsidiary is a corporation duly organized, validly 
existing and in good standing under the laws of the jurisdiction of its 
incorporation and has all requisite corporate power and authority to own 
its property and assets and to carry on its business.  The Company and 
its subsidiary are duly qualified to transact business and are in good 
standing in all jurisdictions where such qualification is required, 
except for such failures to be so qualified or in good standing as would 
not, individually or in the aggregate, have a Material Adverse Effect on 
the Company or its subsidiary.  For purposes of this Agreement, a 
"Material Adverse Effect" or a "Material Adverse Change" shall mean (i) 
any change in, or effect on, a specified entity that is, or is 
reasonably likely to be, materially adverse to the condition (financial 
or other), business, results of operations, prospects, assets, 
liabilities or operations of the entity or on the ability of the entity 
to consummate any of the transactions contemplated hereby, or (ii) any 
event or condition that would, with or without the passage of time, 
constitute a "Material Adverse Effect" or a "Material Adverse Change" as 
defined in clause (i) above.  The copies of the Certificate of 
Incorporation and Bylaws of the Company, as amended to date, have been 
furnished to each Purchaser by the Company and are correct and complete 
as so furnished.
2.2     Capitalization.  The authorized capital of the Company 
will consist, immediately prior to the Closing (unless another time 
period is specified below), of:
(a)     2,000,000 shares of Preferred Stock, 30,000 
shares of which have been designated Series A Preferred Stock and 
662,500 shares of which have been designated Series B Convertible 
Preferred Stock, none of which are issued and outstanding immediately 
prior to the Closing, and 100,000 of which are reserved for the payment 
of dividends to holders of the Stock.  The rights, privileges and 
preferences of the Series B Convertible Preferred Stock are as stated in 
the Certificate of Designation.
(b)     30,000,000 shares of Common Stock, 12,672,950 
shares of which are issued and outstanding as of May 31, 1998.  All of  
the outstanding shares of Common Stock have been duly authorized, fully 
paid and are nonassessable and issued in compliance with all applicable 
federal and state securities laws.
(c)     The Company has reserved 2,650,000 shares of 
Common Stock for issuance upon conversion of the Series B Convertible 
Preferred Stock.  The Company has reserved (i) 1,290,000 shares of 
Common Stock for issuance to employees and consultants of the Company 
pursuant to its 1995 Stock Plan duly adopted by the Board of Directors 
and approved by the Company stockholders (the "1995 Stock Plan"), (ii) 
200,000 shares of Common Stock for issuance to employees of the Company 
pursuant to its 1995 Employee Stock Purchase Plan duly adopted by the 
Board of Directors and approved by the Company stockholders (the 
"ESPP"), (iii) 150,000 shares of Common Stock for issuance to employees 
of the Company pursuant to its 1995 Directors Stock Option Plan duly 
adopted by the Board of Directors and approved by the Company 
stockholders (the "Directors' Plan") and (iv) 300,000 shares of Common 
Stock for issuance to employees and consultants pursuant to its 1997 
Stock Plan duly adopted by the Board of Directors (the "1997 Stock 
Plan").  Of such reserved shares of Common Stock, as of May 31, 1998, 
(i) 895,377 options to purchase shares have been granted under the 1995 
Stock Plan and 504,225 shares of Common Stock remain available for 
issuance pursuant to the 1995 Stock Plan, (ii) 41,202 shares have been 
issued under the ESPP and 158,798 shares of Common Stock remain 
available for issuance pursuant to the ESPP, (iii) 84,500 options to 
purchase shares have been granted under the Directors' Plan and 85,500 
shares of Common Stock remain available for issuance pursuant to the 
Directors' Plan, and (iv) 141,215 options to purchase shares have been 
granted under the 1997 Stock Plan and 184,430 shares of Common Stock 
remain available for issuance pursuant to the 1997 Stock Plan.  No 
shares of Common Stock or Preferred Stock are held in the Company's 
treasury.
(d)     Except for outstanding options issued pursuant 
to the 1995 Stock Plan, the 1997 Stock Plan, and the Director's Plan and 
outstanding rights to purchase shares of Common Stock pursuant to the 
ESPP, there are no outstanding securities, options, warrants, rights 
(including conversion or preemptive rights and rights of first refusal 
or similar rights) or agreements, orally or in writing, to purchase or 
acquire, or exchangeable for or convertible into, any shares of the 
Company's capital stock.  To the Company's knowledge, there are no 
outstanding stockholder agreements, voting trusts, proxies or other 
arrangements or understandings among the stockholders of the Company 
relating to the voting of their respective shares.
2.3     Subsidiaries.  The Company does not currently own or 
control, directly or indirectly, any interest in any other corporation, 
association, or other business entity.  The Company is not a participant 
in any joint venture or partnership.
2.4     Authorization. The Company has full power to execute, 
deliver and perform this Agreement and the Investors' Rights Agreement, 
in the form attached hereto as Exhibit D (the "Investors' Rights 
Agreement" and collectively with this Agreement, the "Agreements").  All 
corporate action on the part of the Company, its officers and directors 
necessary for the authorization, execution and delivery of this 
Agreement and the Investors' Rights Agreement, the performance of all 
obligations of the Company hereunder and thereunder and the 
authorization, sale, issuance and delivery of the Stock and the Common 
Stock issuable upon conversion of the Stock (together, the "Securities") 
has been taken or will be taken prior to the Closing, and the 
Agreements, when executed and delivered by the Company, shall constitute 
valid and legally binding obligations of the Company, enforceable 
against the Company in accordance with their terms except (i) as limited 
by applicable bankruptcy, insolvency, reorganization, moratorium, 
fraudulent conveyance, and other laws of general application affecting 
enforcement of creditors' rights generally, as limited by laws relating 
to the availability of specific performance, injunctive relief, or other 
equitable remedies or (ii) to the extent the indemnification provisions 
contained in the Investors' Rights Agreement may be limited by 
applicable federal or state securities laws.
2.5     Valid Issuance of Securities.  The Stock that is being 
issued to the Purchasers hereunder, when issued, sold and delivered in 
accordance with the terms hereof for the consideration expressed herein, 
will be duly and validly issued and outstanding, fully paid and 
nonassessable, free of any liens, encumbrances, preemptive rights or 
rights of first refusal, and free of restrictions on transfer other than 
restrictions on transfer under this Agreement, the Investors' Rights 
Agreement and applicable state and federal securities laws.  Based in 
part upon the representations of the Purchasers in this Agreement and 
subject to the provisions of Section 2.6 below, the Stock will be issued 
in compliance with all applicable federal and state securities laws.  
The Common Stock issuable upon conversion of the Stock has been duly and 
validly reserved for issuance, and upon issuance in accordance with the 
terms of the Certificate of Designation, shall be duly and validly 
issued, fully paid and nonassessable, free of any liens, encumbrances, 
preemptive rights or rights of first refusal, and free of restrictions 
on transfer other than restrictions on transfer under this Agreement, 
the Investors' Rights Agreement and applicable federal and state 
securities laws and will be issued in compliance with all applicable 
federal and state securities laws.  The Common Stock issuable upon 
conversion of the Stock will be subject to the rights provided in the 
Company's Preferred Shares Rights Agreement dated August 18, 1997, to 
the extent applicable, as described therein.
2.6     Governmental Consents.  No consent, approval, order or 
authorization of, or registration, qualification, designation, 
declaration or filing with, any federal, state or local governmental 
authority on the part of the Company is required in connection with the 
valid and lawful authorization, execution and delivery by the Company of 
this Agreement or the Investors' Rights Agreement, and the consummation 
of the transactions contemplated hereby or thereby, or for or in 
connection with the valid and lawful authorization, issuance, sale and 
delivery of the Stock and the Common Stock issuable upon conversion of 
the Stock in accordance with this Agreement, other than filings pursuant 
to Regulation D of the Securities Act of 1933, as amended (the 
"Securities Act"), and the qualification (or taking of such action as 
may be necessary to secure an exemption from qualification if available) 
of the offer and sale of the Stock under all applicable state securities 
laws, which filings and qualifications, if required, will be 
accomplished in a timely manner so as to comply with such qualification 
or exemption from qualification requirements.
2.7     Litigation.  There is no action, suit, proceeding or 
investigation pending or, to the knowledge of the Company and its 
subsidiary, currently threatened against or affecting the Company or its 
subsidiary, its business or its assets, nor is the Company or its 
subsidiary aware that there is any basis for the foregoing.  Neither the 
Company nor its subsidiary is a party or subject to the provisions of 
any order, writ, injunction, judgment or decree of any court or 
government agency or instrumentality.  There is no action, suit, 
proceeding or investigation by the Company or its subsidiary currently 
pending or which the Company or its subsidiary intends to initiate.
                2.8     SEC Documents; Financial Statements.  Each complete or 
partial statement, report, prospectus filed under the Securities Act of 
1933, as amended ("Securities Act"), is a true and complete copy of or 
excerpt from such document as filed by the Company with the Securities 
and Exchange Commission ("SEC") (the "Security Act Documents").  The 
Company has timely filed all the documents that it was required to file 
with the SEC under the Securities Exchange Act of 1934, as amended 
("Exchange Act") (the "Exchange Act Documents" and together with the 
Securities Act Documents, the "SEC Documents"), since the date on which 
its Quarterly Report on Form 10-Q for the quarter ended March 31, 1998 
was filed.  As of their respective filing dates, the SEC Documents 
complied in all material respects with the requirements of the Exchange 
Act or the Securities Act, as applicable, and were duly and timely filed 
with the SEC.  None of the SEC Documents as of their respective dates 
contained any untrue statement of a material fact or omitted to state a 
material fact required to be stated therein or necessary to make the 
statements made therein, in light of the circumstances under which they 
were made, not misleading.  The consolidated financial statements of the 
Company included in the SEC Documents (the "Financial Statements") 
comply as to form in all material respects with applicable accounting 
requirements and with the published rules and regulations of the SEC 
with respect thereto.  Except as may be indicated in the notes to the 
Financial Statements or, in the case of unaudited statements, as 
permitted by Form 10-Q of the SEC, the Financial Statements have been 
prepared in accordance with generally accepted accounting principles 
consistently applied and fairly present the financial position of the 
Company and its subsidiary at the dates thereof and the results of its 
operations and cash flows for the periods then ended (subject, in the 
case of unaudited statements, to normal year-end adjustments).

2.9     Changes  Since March 31, 1998, there has not been:
(a)     any change in the assets, liabilities, financial 
condition or operating results of the Company or its subsidiary from 
that reflected in the Financial Statements, except changes in the 
ordinary course of business that have not been, in the aggregate, a 
Material Adverse Change for the Company or its subsidiary;
(b)     any damage, destruction or loss, whether or not 
covered by insurance, materially and adversely affecting the business, 
properties, prospects, or financial condition of the Company or its 
subsidiary;
(c)     any waiver or compromise by the Company or its 
subsidiary of a valuable right or of a material debt owed to it;
(d)     any satisfaction or discharge of any lien, 
claim, or encumbrance or payment of any obligation by the Company or its 
subsidiary, except in the ordinary course of business and that is not 
material to the business, properties, prospects or financial condition 
of the Company;
(e)     any material change to a material contract or 
agreement by which the Company or its subsidiary or any of their assets 
is bound or subject;
(f)     any material change in any compensation 
arrangement or agreement with any employee, officer, director or 
stockholder;
(g)     any sale, assignment or transfer of any patents, 
trademarks, copyrights, trade secrets or other intangible assets;
(h)     any resignation or termination of employment of 
any officer or key employee of the Company or its subsidiary; and 
neither the Company nor its subsidiary is aware of any impending 
resignation or termination of employment of any such officer or key 
employee;
(i)     any mortgage, pledge, transfer of a security 
interest in, or lien, created by the Company or its subsidiary, with 
respect to any of its material properties or assets, except liens for 
taxes not yet due or payable;
(j)     any loans or guarantees made by the Company or 
its subsidiary to or for the benefit of its employees, officers or 
directors, or any members of their immediate families, other than travel 
advances and other advances made in the ordinary course of its business;
(k)     any declaration, setting aside or payment or 
other distribution in respect to any of the capital stock of the Company 
or its subsidiary, or any direct or indirect redemption, purchase, or 
other acquisition of any of such stock by the Company or its subsidiary;
(l)     to the Company's knowledge, any other event or 
condition of any character that might have a Material Adverse Effect on 
the Company or its subsidiary; 
(m)     any borrowing of or agreement to borrow any 
funds or any material liability (contingent or otherwise) incurred by 
the Company or its subsidiary, other than obligations incurred in the 
ordinary course of business and consistent with past practice;
(n)     any issuance of any stock, bonds or other 
securities of the Company or its subsidiary or options, warrants or 
rights or agreements or commitments to purchase or issue such securities 
or to grant such options, warrants or rights, except for the granting of 
options to employees, directors and consultants in the ordinary course 
of business and consistent with past practice;
(o)     any change in the accounting methods or 
practices followed by the Company or its subsidiary; or
(p)     any arrangement or commitment (contingent or 
otherwise) by the Company or its subsidiary to do any of the things 
described in this Section 2.9.
Since March 31, 1998, neither the Company nor its subsidiary has 
entered into any transaction or arrangement except in the ordinary 
course of business and consistent with past practice, or entered into 
any agreement (contingent or otherwise) to do so.
2.10    Title to Properties.  Except as disclosed in the 
Financial Statements, the Company or its subsidiary has good and 
marketable title to, or has a valid leasehold interest in, or a valid 
license for, all of the properties and assets reflected in the Financial 
Statements, free and clear of all mortgages, security interests, liens, 
restrictions or encumbrances (collectively, "Liens") other than (i) 
liens for taxes not yet due and payable and (ii) Liens which, 
individually or in the aggregate, do not materially detract from the 
value of the property subject thereto or materially impair the 
operations of the Company or its subsidiary, would not result in the 
occurrence of a Material Adverse Change, and which have not arisen 
otherwise than in the ordinary course of business.  
2.11    Tax Matters.  
(a)     All taxes, including, without limitation, 
income, excise, property, sales, transfer, use, franchise, payroll, 
employees' income withholding and social security taxes imposed or 
assessed by the United States or by any foreign country or by any state, 
municipality, subdivision or instrumentality of the United States or of 
any foreign country, or by any other taxing authority, which are due and 
payable by the Company or its subsidiary, and all interest, penalties 
and additions thereon, whether disputed or not, have been paid in full 
or are adequately reserved for in the Financial Statements; all tax 
returns or other documents required to be filed in connection therewith 
have been accurately prepared and duly and timely filed, except for tax 
returns the non-filing of which in the aggregate would not have a 
Material Adverse Effect on the Company or its subsidiary; and neither 
the Company nor its subsidiary is the beneficiary of any extension of 
time within which to file any such returns.  Neither the Company nor its 
subsidiary has been delinquent in the payment of any foreign or domestic 
tax, assessment or governmental charge or deposit and has no tax 
deficiency or claim outstanding, assessed or, to its knowledge, proposed 
against it, and there is no basis for any such deficiency or claim.  No 
issues have been raised (or are currently pending) by the Internal 
Revenue Service or any other taxing authority in connection with any of 
the returns and reports referred to above, and no waivers of statutes of 
limitations have been given or requested with respect to the Company or 
its subsidiary in connection therewith.  The provisions for taxes in the 
Financial Statements are sufficient for the payment of all accrued and 
unpaid federal, state, county and local taxes of the Company or its 
subsidiary.
(b)     The Company is not now and has never been a 
"United States real property holding corporation," as defined in Section 
897(c)(2) of the Internal Revenue Code of 1986, as amended (the "Code"), 
and Section 1.897-2(b) of the Regulations promulgated by the Internal 
Revenue Service, and the Company has filed with the Internal Revenue 
Service all statements, if any, with its United States income tax 
returns which are required under Section 1.897-2(h) of such Regulations.
(c)     Neither the Company nor its subsidiary is a 
party to or bound by any tax indemnity, tax sharing or tax allocation 
agreement.
(d)     The Company is not presently a member of an 
affiliated group of corporations within the meaning of Section 1504 of 
the Code.  The Company was formerly a member of an affiliated group of 
corporations within the meaning of Section 1504 of the Code.  As a 
former member of such group, the Company did not assume any tax 
liability or asset under a tax sharing arrangement for its share of a 
consolidated tax liability or a consolidated tax loss, nor was there a 
tax liability or asset assumed upon leaving the affiliated group.
2.12    No Material Defaults.  Each of the Company and its 
subsidiary is not in violation of or default under any provision of (a) 
its Certificate of Incorporation or Bylaws or (b) any mortgage, 
indenture, lease or other agreement or instrument, permit, concession, 
franchise or license to which it is a party or by which it is bound or 
(c) any federal or state judgment, order, decree, statue, law, 
ordinance, rule or regulation applicable to the Company, except with 
respect to clauses (b) and (c) above, such violations or defaults as 
would not have a Material Adverse Effect on the Company.
2.13    Patents and Trademarks. To its knowledge, and except 
as disclosed in the SEC Documents, the Company and its subsidiary owns 
or possesses sufficient legal rights to all patents, trademarks, service 
marks, tradenames, copyrights, trade secrets, licenses, information and 
proprietary rights and processes necessary for its business as now 
conducted and as proposed to be conducted, without infringement of any 
rights of a third party. Neither the Company nor its subsidiary has 
received any communications alleging that it has violated or, by 
conducting its business as proposed, would violate any of the patents, 
trademarks, service marks, tradenames, copyrights, trade secrets or 
other proprietary rights or processes of any other person or entity, 
which violation would have a Material Adverse Effect on the Company or 
its subsidiary.  Except as disclosed in the SEC Documents, neither the 
Company nor its subsidiary has granted (nor has the Company or its 
subsidiary licensed from a third party) any material rights to or 
licenses to its patents, trademarks, service marks, tradenames, 
copyrights, trade secrets or other proprietary rights or processes.
2.14    No Conflict.    The execution and delivery of this 
Agreement and the Investors' Rights Agreement do not, and the 
consummation of the transactions contemplated hereby and thereby will 
not, (i) conflict with, or result in any violation of, or default (with 
or without notice or lapse of time, or both), or give rise to a right of 
termination, cancellation or acceleration of any obligation or to a loss 
of a material benefit, under, any provision of the Certificate of 
Incorporation or Bylaws of the Company or any mortgage, indenture, lease 
or other agreement or instrument, permit, concession, franchise, 
license, judgment, order, decree, statue, law, ordinance, rule or 
regulation applicable to the Company, its properties or assets, which 
conflict, violation, default or right would have a Material Adverse 
Effect on the Company or (ii) result in the creation of any lien, 
security interest, charge or encumbrance upon any of the properties or 
assets of the Company or the Securities.
2.15    Securities Laws.  Assuming that the Purchasers' 
representations and warranties contained in Section 3 of this Agreement 
are true and correct, the offer, issuance and sale of the Securities are 
and will be exempt from the registration and prospectus delivery 
requirements of the Securities Act and have been registered or qualified 
(or are exempt from registration and qualification) under the 
registration, permit or qualification requirements of all applicable 
state securities laws.
2.16    Business.  The Company and its subsidiary have 
complied in all respects with all federal, state, local and foreign 
laws, ordinances, regulations and orders applicable to the business of 
the Company and its subsidiary as presently or previously conducted and 
as proposed to be conducted, except where the noncompliance of which in 
the aggregate would not have a Material Adverse Effect on the Company or 
its subsidiary.  The Company and its subsidiary have all federal, state, 
local and foreign governmental licenses and permits that are required 
for the conduct of its business as presently or previously conducted by 
the Company or its subsidiary, except where the noncompliance of which 
in the aggregate would not have a Material Adverse Effect on the Company 
or its subsidiary, which licenses and permits are in full force and 
effect, and no violations are outstanding or uncured with respect to any 
such licenses or permits and no proceeding is pending or, to the 
knowledge of the Company or its subsidiary, threatened to revoke or 
limit any thereof.
2.17    Certain Regulatory Matters.  There are no unfulfilled 
outstanding agreements with or commitments to the United States 
Department of Health, Food and Drug Administration (the "FDA") or any 
other regulatory body (domestic or foreign) of any kind or character 
with respect to any product sold or contemplated to be sold by the 
Company or its subsidiary (the "Products"); there are no adverse 
regulatory actions by the FDA or any other foreign or domestic 
regulatory body pending with respect to any Product; and neither the 
Company nor its subsidiary has any knowledge or information with respect 
to the initiation, pendency or threat by the FDA or other such 
regulatory body of any adverse regulatory action that could affect any 
of the Products.
2.18    Registration Rights.    The Company is not presently 
under any obligation and has not granted any rights to register its 
securities under the Securities Act with respect to any of its presently 
outstanding securities or any of its securities that may hereafter be 
issued, which rights would be implicated with respect to the 
registration contemplated by the Investors' Rights Agreement and which 
rights have not been waived by the holders thereof.
2.19    Disclosure.  Neither this Agreement, nor any other 
written document, certificate, instrument or statement furnished or made 
available in connection with the transactions contemplated hereby 
contains any untrue statement of a material fact or omits to state a 
material fact necessary in order to make the statements contained herein 
and therein not misleading.  There is no fact known to the Company or 
its subsidiary materially affecting the Company, its subsidiary or its 
business or the existence of which could have a Material Adverse Effect 
on the Company or its subsidiary, which has not been set forth in this 
Agreement or in the other documents, certificates, instruments or 
statements furnished to each Purchaser by or on behalf of the Company or 
its subsidiary.
2.20    Solvency; No Default.  As of this date the Company and 
its subsidiary have sufficient funds and cash flow to pay their debts 
and other liabilities as they become due, and neither the Company nor 
its subsidiary is in default with respect to any material debt or 
liability.
3.      Representations and Warranties of the Purchasers.  Each 
Purchaser hereby represents and warrants to the Company that:
3.1     Authorization.  Such Purchaser has full power and 
authority to enter into this Agreement.  The Agreements, when executed 
and delivered by the Purchaser, will constitute valid and legally 
binding obligations of the Purchaser, enforceable in accordance with 
their terms, except (i) as limited by applicable bankruptcy, insolvency, 
reorganization, moratorium, fraudulent conveyance, and any other laws of 
general application affecting enforcement of creditors' rights 
generally, and as limited by laws relating to the availability of a 
specific performance, injunctive relief, or other equitable remedies or 
(ii) to the extent the indemnification provisions contained in the 
Investors' Rights Agreement may be limited by applicable federal or 
state securities laws.
3.2     Purchase Entirely for Own Account.  This Agreement is 
made with the Purchaser in reliance upon the Purchaser's representation 
to the Company, which by the Purchaser's execution of this Agreement, 
the Purchaser hereby confirms, that the Securities to be acquired by the 
Purchaser will be acquired for investment for the Purchaser's own 
account, not as a nominee or agent, and not with a view to the resale or 
distribution of any part thereof.
3.3     Disclosure of Information.  The Purchaser has had an 
opportunity to discuss the Company's business, management, financial 
affairs and the terms and conditions of the offering of the Stock with 
the Company's management and has had an opportunity to review the 
Company's facilities.  The Purchaser understands that such discussions, 
as well as the Business Plan and any other written information delivered 
by the Company to the Purchaser, were intended to describe the aspects 
of the Company's business which it believes to be material.  The 
foregoing, however, does not limit or modify the representations and 
warranties of the Company in Section 2 of this Agreement or the right of 
the Purchasers to rely thereon.
3.4     Restricted Securities.  The Purchaser understands that 
the Securities have not been, and will not be, registered under the 
Securities Act, by reason of a specific exemption from the registration 
provisions of the Securities Act which depends upon, among other things, 
the bona fide nature of the investment intent and the accuracy of the 
Purchaser's representations as expressed herein.  The Purchaser 
understands that the Securities are "restricted securities" under 
applicable U.S. federal and state securities laws and that, pursuant to 
these laws, the Purchaser must hold the Securities indefinitely unless 
they are registered with the Securities and Exchange Commission and 
qualified by state authorities, or an exemption from such registration 
and qualification requirements is available.  The Purchaser acknowledges 
that the Company has no obligation to register or qualify the Securities 
for resale except as set forth in the Investors' Rights Agreement.  The 
Purchaser further acknowledges that if an exemption from registration or 
qualification is available, it may be conditioned on various 
requirements including, but not limited to, the time and manner of sale, 
the holding period for the Securities, and on requirements relating to 
the Company which are outside of the Purchaser's control, and, subject 
to the Company's obligations under the Investors' Rights Agreement, 
which the Company is under no obligation and may not be able to satisfy.
3.5     No Public Market.  The Purchaser understands that no 
public market now exists for the Stock, and that the Company has made no 
assurances that a public market will ever exist for the Stock.
3.6     Legends.  The Purchaser understands that the 
Securities and any securities issued in respect of or exchange for the 
Securities, may bear one or all of the following legends:
(a)     "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE 
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND 
HAVE BEEN ACQUIRED FOR INVESTMENT AND NOT WITH A VIEW TO, OR IN 
CONNECTION WITH, THE SALE OR DISTRIBUTION THEREOF.  NO SUCH SALE OR 
DISTRIBUTION MAY BE EFFECTED WITHOUT AN EFFECTIVE REGISTRATION STATEMENT 
RELATED THERETO OR AN OPINION OF COUNSEL IN A FORM SATISFACTORY TO THE 
COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE SECURITIES ACT 
OF 1933, AS AMENDED, OR UNLESS SOLD PURSUANT TO RULE 144 OF SUCH ACT."
(b)     Any legend set forth in the Investors' Rights 
Agreement.
(c)     Any legend required by the Blue Sky laws of any 
state to the extent such laws are applicable to the shares represented 
by the certificate so legended.
3.7     Accredited Investor.  The Purchaser is an accredited 
investor as defined in Rule 501(a) of Regulation D promulgated under the 
Securities Act.
3.8     Foreign Investors.  If the Purchaser is not a United 
States person (as defined by Section 7701(a)(30) of the Internal Revenue 
Code of 1986, as amended), such Purchaser hereby represents that it has 
satisfied itself as to the full observance of the laws of its 
jurisdiction in connection with any invitation to subscribe for the 
Stock or any use of this Agreement, including (i) the legal requirements 
within its jurisdiction for the purchase of the Stock, (ii) any foreign 
exchange restrictions applicable to such purchase, (iii) any 
governmental or other consents that may need to be obtained, and 
(iv) the income tax and other tax consequences, if any, that may be 
relevant to the purchase, holding, redemption, sale, or transfer of the 
Stock.  Such Purchaser's subscription and payment for and continued 
beneficial ownership of the Stock, will not violate any applicable 
securities or other laws of the Purchaser's jurisdiction.
4.      Conditions of the Purchasers' Obligations at Closing.  The 
obligations of each Purchaser to the Company under this Agreement are 
subject to the fulfillment, on or before the Closing, of each of the 
following conditions, unless otherwise waived in writing by each 
Purchaser:
4.1     Representations and Warranties.  The representations 
and warranties of the Company contained in Section 2 shall be true and 
correct in all material respects (disregarding for this purpose any 
qualifications with respect to materiality), on and as of the Closing 
with the same effect as though such representations and warranties had 
been made on and as of the date of the Closing.
4.2     Performance.  The Company shall have performed and 
complied with all covenants, agreements, obligations and conditions 
contained in this Agreement that are required to be performed or 
complied with by it on or before the Closing.
4.3     Compliance Certificate.  The Vice President, Finance 
and Administration and Chief Financial Officer of the Company shall 
deliver to the Purchasers at the Closing a certificate certifying that 
the conditions specified in Sections 4.1, 4.2 and 4.4 have been 
fulfilled.
4.4     Qualifications.  All authorizations, approvals or 
permits, if any, of any governmental authority or regulatory body of the 
United States or of any state that are required in connection with the 
lawful issuance and sale of the Stock pursuant to this Agreement shall 
be obtained and effective as of the Closing.
4.5     Opinion of Company Counsel.  The Purchasers shall have 
received from Venture Law Group, counsel for the Company, an opinion, 
dated as of the Closing, in substantially the form of Exhibit E.
4.6     Board of Directors.  As of the Closing, the number of 
authorized directors shall be eight (8) members, and the Board shall be 
comprised of Charles Crocker, John R. Gilbert, Kathleen La Porte, 
Lawrence A. Lehmkuhl, Thomas M. Loarie, Kshitij Mohan, Arthur M. Pappas 
and Steven N. Weiss.
4.7     Investors' Rights Agreement.  The Company and each 
Purchaser shall have executed and delivered the Investors' Rights 
Agreement in substantially the form attached as Exhibit D.
4.8     Certificate of Designation.  The Company shall have 
filed the Certificate of Designation in substantially the form attached 
as Exhibit B with the Secretary of State of Delaware on or prior to the 
Closing Date, which shall continue to be in full force and effect as of 
the Closing Date.
5.      Conditions of the Company's Obligations at Closing.  The 
obligations of the Company to each Purchaser under this Agreement are 
subject to the fulfillment, on or before the Closing, of each of the 
following conditions, unless otherwise waived in writing:
5.1     Representations and Warranties.  The representations 
and warranties of each Purchaser contained in Section 3 shall be true 
and correct in all material respects on and as of the Closing with the 
same effect as though such representations and warranties had been made 
on and as of the Closing.
5.2     Performance.  All covenants, agreements and conditions 
contained in this Agreement to be performed by the Purchasers on or 
prior to the Closing shall have been performed or complied with in all 
material respects.
5.3     Qualifications.  All authorizations, approvals or 
permits, if any, of any governmental authority or regulatory body of the 
United States or of any state that are required in connection with the 
lawful issuance and sale of the Stock pursuant to this Agreement shall 
be obtained and effective as of the Closing.
6.      Miscellaneous.
6.1     Survival of Warranties.  Unless otherwise set forth in 
this Agreement, the warranties, representations and covenants of the 
Company and the Purchasers contained in or made pursuant to this 
Agreement shall survive the execution and delivery of this Agreement for 
a period of two (2) years following the Closing and shall in no way be 
affected by an investigation of the subject matter thereof made by or on 
behalf of the Company or any such Purchaser.
6.2     Transfer; Successors and Assigns.  The terms and 
conditions of this Agreement shall inure to the benefit of and be 
binding upon the respective successors and assigns of the parties.  
Nothing in this Agreement, express or implied, is intended to confer 
upon any party other than the parties hereto or their respective 
successors and assigns any rights, remedies, obligations, or liabilities 
under or by reason of this Agreement, except as expressly provided in 
this Agreement.
6.3     Governing Law.  This Agreement and all acts and 
transactions pursuant hereto and the rights and obligations of the 
parties hereto shall be governed, construed and interpreted in 
accordance with the laws of the State of California, without giving 
effect to principles of conflicts of law.
6.4     Counterparts.  This Agreement may be executed in two 
or more counterparts, each of which shall be deemed an original and all 
of which together shall constitute one instrument.
6.5     Titles and Subtitles.  The titles and subtitles used 
in this Agreement are used for convenience only and are not to be 
considered in construing or interpreting this Agreement.
6.6     Notices.  Any notice required or permitted by this 
Agreement shall be in writing and shall be deemed sufficient upon 
delivery, when delivered personally or by overnight courier or sent by 
telegram or fax, or forty-eight (48) hours after being deposited in the 
U.S. mail, as certified or registered mail, with postage prepaid, 
addressed to the party to be notified at such party's address as set 
forth on the signature page or Exhibit A hereto, or as subsequently 
modified by written notice, and (a) if to the Company, with a copy to 
Edmund S. Ruffin, Jr., Venture Law Group, 2800 Sand Hill Road, Menlo 
Park, CA  94025 or (b) if to the Purchasers, with a copy to Scott 
Dettmer, Gunderson Dettmer Stough Villeneuve Franklin & Hachigian, 155 
Constitution Drive, Menlo Park, California 94025 and to Office of the 
General Counsel, Johnson & Johnson, One Johnson & Johnson Plaza, New 
Brunswick, New Jersey 08933.
6.7     Finder's Fee.  Except for the fees and expenses owed 
by the Company to Cowen & Company, each party represents that it neither 
is nor will be obligated for any finder's fee or commission in 
connection with this transaction.  Each Purchaser agrees to indemnify 
and to hold harmless the Company from any liability for any commission 
or compensation in the nature of a finder's fee (and the costs and 
expenses of defending against such liability or asserted liability) for 
which each Purchaser or any of its officers, employees, or 
representatives is responsible.  The Company agrees to indemnify and 
hold harmless each Purchaser from any liability for any commission or 
compensation in the nature of a finder's fee (and the costs and expenses 
of defending against such liability or asserted liability) for which the 
Company or any of its officers, employees or representatives 
is responsible.
6.8     Attorney's Fees.  If any action at law or in equity 
(including arbitration) is necessary to enforce or interpret the terms 
of any of the Agreements, the prevailing party shall be entitled to 
reasonable attorney's fees, costs and necessary disbursements in 
addition to any other relief to which such party may be entitled.
6.9     Amendments and Waivers.  Any term of this Agreement 
may be amended or waived only with the written consent of (i) the 
Company, (ii) the holders of a majority of the shares of Common Stock 
issuable or issued upon conversion of the Stock and each Purchaser 
adversely affected in a manner different than the other Purchasers and 
(iii) Johnson & Johnson Development Corporation if its obligations 
hereunder are materially increased by such amendment.  Any amendment or 
waiver effected in accordance with this Section 6.9 shall be binding 
upon the Purchasers and each transferee of the Stock (or the Common 
Stock issuable upon conversion thereof), each future holder of all such 
securities, and the Company.
6.10    Severability.  If one or more provisions of this 
Agreement are held to be unenforceable under applicable law, the parties 
agree to renegotiate such provision in good faith.  In the event that 
the parties cannot reach a mutually agreeable and enforceable 
replacement for such provision, then (a) such provision shall be 
excluded from this Agreement, (b) the balance of the Agreement shall be 
interpreted as if such provision were so excluded and (c) the balance of 
the Agreement shall be enforceable in accordance with its terms.
6.11    Delays or Omissions.  No delay or omission to exercise 
any right, power or remedy accruing to any party under this Agreement, 
upon any breach or default of any other party under this Agreement, 
shall impair any such right, power or remedy of such non-breaching or 
non-defaulting party nor shall it be construed to be a waiver of any 
such breach or default, or an acquiescence therein, or of or in any 
similar breach or default thereafter occurring; nor shall any waiver of 
any single breach or default be deemed a waiver of any other breach or 
default theretofore or thereafter occurring.  Any waiver, permit, 
consent or approval of any kind or character on the part of any party of 
any breach or default under this Agreement, or any waiver on the part of 
any party of any provisions or conditions of this Agreement, must be in 
writing and shall be effective only to the extent specifically set forth 
in such writing.  All remedies, either under this Agreement or by law or 
otherwise afforded to any party, shall be cumulative and not 
alternative.
6.12    Entire Agreement.  This Agreement, and the documents 
referred to herein constitute the entire agreement between the parties 
hereto pertaining to the subject matter hereof, and any and all other 
written or oral agreements relating to the subject matter hereof 
existing between the parties hereto are expressly canceled.
6.13    Corporate Securities Law.  THE SALE OF THE SECURITIES 
WHICH ARE THE SUBJECT OF THIS AGREEMENT HAS NOT BEEN QUALIFIED WITH THE 
COMMISSIONER OF CORPORATIONS OF THE STATE OF CALIFORNIA AND THE ISSUANCE 
OF THE SECURITIES OR THE PAYMENT OR RECEIPT OF ANY PART OF THE 
CONSIDERATION THEREFOR PRIOR TO THE QUALIFICATION IS UNLAWFUL, UNLESS 
THE SALE OF SECURITIES IS EXEMPT FROM THE QUALIFICATION BY SECTION 
25100, 25102 OR 25105 OF THE CALIFORNIA CORPORATIONS CODE.  THE RIGHTS 
OF ALL PARTIES TO THIS AGREEMENT ARE EXPRESSLY CONDITIONED UPON THE 
QUALIFICATION BEING OBTAINED UNLESS THE SALE IS SO EXEMPT.
6.14    Confidentiality.  Each party hereto agrees that, 
except with the prior written permission of the other party, and except 
as any Purchaser may be required to disclose under ERISA, it shall at 
all times keep confidential and not divulge, furnish or make accessible 
to anyone any confidential information, knowledge or data concerning or 
relating to the business or financial affairs of the other parties to 
which such party has been or shall become privy by reason of this 
Agreement, discussions or negotiations relating to this Agreement, the 
performance of its obligations hereunder or the ownership of Stock 
purchased hereunder.  The provisions of this Section 6.14 shall be in 
addition to, and not in substitution for, the provisions of any separate 
nondisclosure agreement executed by the parties hereto with respect to 
the transactions contemplated hereby.
6.15    Exculpation Among Purchasers.  Each Purchaser 
acknowledges that it is not relying upon any person, firm or 
corporation, other than the Company and its officers and directors, in 
making its investment or decision to invest in the Company.  Each 
Purchaser agrees that no Purchaser nor the respective controlling 
persons, officers, directors, partners, agents, or employees of any 
Purchaser shall be liable to any other Purchaser for any action 
heretofore or hereafter taken or omitted to be taken by any of them in 
connection with the purchase of the Securities, except as provided in 
the Investors' Rights Agreement.
6.16    Waiver of Conflicts.  Each party to this Agreement 
acknowledges that Venture Law Group, counsel for the Company, has in the 
past performed and may continue to perform legal services for certain of 
the Purchasers in matters unrelated to the transactions described in 
this Agreement, including the representation of such Purchasers in 
venture capital financings and other matters.  Accordingly, each party 
to this Agreement hereby (a) acknowledges that they have had an 
opportunity to ask for information relevant to this disclosure; and 
(b) gives its informed consent to Venture Law Group's representation of 
certain of the Purchasers in such unrelated matters and to Venture Law 
Group's representation of the Company in connection with this Agreement 
and the transactions contemplated hereby.
6.17    Publicity.  No party shall originate any publicity, 
news release or other public announcement, written or oral (a 
"Release"), whether relating to the performance under this Agreement or 
the existence of any arrangement between the parties, without the prior 
written consent of the other parties, except where such Release is 
required by law (in which event, the Purchasers shall be consulted by 
the Company in connection with any such Release prior to its release and 
shall be provided with a copy thereof); provided that the parties hereby 
agree that a Release substantially in the form attached hereto as 
Exhibit F shall be released by the Company as promptly as practicable 
following the execution of this Agreement.
6.18    Expenses; Transfer Taxes.  Upon closing, the Company 
shall reimburse the reasonable fees and expenses of Gunderson Dettmer 
Stough Villeneuve Franklin & Hachigian, L.L.P., not to exceed $20,000, 
incurred in connection with all transactions leading up to and including 
the Closing.  Except as provided in the foregoing sentence, each party 
shall pay its own fees and expenses (including the fees of any 
attorneys, accountants, investment bankers or others engaged by such 
party) in connection with this Agreement and the transactions 
contemplated hereby whether or not the transactions contemplated hereby 
are consummated.  Notwithstanding the foregoing, the Company shall pay, 
and shall indemnify and hold harmless the Purchasers from and against, 
all sales, use, transfer or similar taxes imposed as a result of the 
transactions contemplated by this Agreement.

 [Signature Page Follows]


The parties have executed this Series B Convertible Preferred 
Stock Purchase Agreement as of the date first written above.
COMPANY:

KeraVision, Inc.


By:  /s/Mark Fischer-Colbrie    

Name: Mark Fischer-Colbrie      
(print)
Title: VP Finance/Admin; CFO    



PURCHASERS:

DLJ Capital Corp.

By: /s/Kathleen D. LaPorte      

Name:  Kathleen D. LaPorte      

Title:   General Partner and 
Attorney in Fact        


DLJ ESC II, L.P.
By:  DLJ LBO Plans Management 
Corporation
Its:  Manager

By: /s/Kathleen D. LaPorte      

Name:  Kathleen D. LaPorte      

Title: Attorney In Fact 


Sprout Capital VIII, L.P.
By: DLJ Capital Corp.
Its: Managing General Partner

By:/s/Kathleen D. LaPorte       

Name:  Kathleen D. LaPorte      

Title:  General Partner and 
Attorney in Fact        


Sprout Venture Capital, L.P.
By: DLJ Capital Corp.
Its: Managing General Partner

By:  /s/Kathleen D. LaPorte     

Name:  Kathleen D. LaPorte      

Title:  General Partner and 
Attorney in Fact        


The Sprout CEO Fund, L.P.
By: DLJ Capital Corp.
Its: General Partner

By:  /s/Kathleen D. LaPorte     

Name:  Kathleen D. LaPorte      

Title:  General Partner and 
Attorney in Fact        




Johnson & Johnson Development 
Corporation

By: /s/Blair M. Flicker 

Name: Blair M. Flicker  

Title: Vice President   


GMI/DRI INVESTMENT TRUST

By: /s/David B. Van Benschoten  

Name:   David B. Van 
Benschoten      

Title:   Executive Secretary - 
Benefit         
           Finance Committee 
of General Mills, 
           Inc. as Named 
Financial Fiduciary     




Special Situations Private 
Equity Fund, LP

By: /s/Austin Marxe     

Name:  Austin Marxe     

Title:  Managing Director       


Special Situations Fund III, LP

By: /s/Austin Marxe     

Name:  Austin Marxe     

Title: Managing Director        


Special Situations Cayman Fund, 
LP

By: /s/Austin Marxe     

Name: Austin Marxe      

Title Managing Director 



EXHIBIT 10.26


KERAVISION, INC.

INVESTORS' RIGHTS AGREEMENT

This Investors' Rights Agreement (the "Agreement") is made as of 
the 12th  day of June, 1998, by and among KeraVision, Inc., a Delaware 
corporation (the "Company"), the investors listed on Exhibit A hereto, 
each of which is herein referred to as an "Investor."
RECITALS
The Company and the Investors have entered into a Series B 
Convertible Preferred Stock Purchase Agreement (the "Purchase 
Agreement") of even date herewith pursuant to which the Company desires 
to sell to the Investors and the Investors desire to purchase from the 
Company shares of the Company's Series B Convertible Preferred Stock.  A 
condition to the Investors' obligations under the Purchase Agreement is 
that the Company and the Investors enter into this Agreement in order to 
provide the Investors with (i) certain rights to register shares of the 
Company's Common Stock issuable upon conversion of the Series B 
Convertible Preferred Stock held by the Investors and (ii)  a right of 
first offer with respect to certain issuances by the Company of its 
securities.  The Company and the Investors each desire to induce the 
Investors to purchase shares of Series B Convertible Preferred Stock 
pursuant to the Purchase Agreement by agreeing to the terms and 
conditions set forth herein.
AGREEMENT
The parties hereby agree as follows:
1.      Registration Rights.  The Company and the Investors covenant 
and agree as follows:
1.1     Definitions.  For purposes of this Section 1:
(a)     The terms "register," "registered," and 
"registration" refer to a registration effected by preparing and filing 
a registration statement or similar document in compliance with the 
Securities Act of 1933, as amended (the "Securities Act"), and the 
declaration or ordering of effectiveness of such registration statement 
or document;
(b)     The term "Registrable Securities" means (i) the 
shares of Common Stock issuable or issued upon conversion of the 
Series B Convertible Preferred Stock and (ii) any other shares of Common 
Stock of the Company issued as (or issuable upon the conversion or 
exercise of any warrant, right or other security which is issued as) or 
by way of a dividend, a stock split or other distribution with respect 
to, or in exchange for or in replacement of, the shares listed in (i) or 
the Series B Convertible Preferred Stock or any shares of Common Stock 
of the Company issued in connection with a combination of shares, 
reclassification, recapitalization, merger, consolidation or 
reorganization with respect to the shares listed in (i) or the Series B 
Convertible Preferred Stock; provided, however, that the foregoing 
definition shall exclude in all cases any Registrable Securities sold by 
a person in a transaction in which his or her rights under this 
Agreement are not assigned.  Notwithstanding the foregoing, Common Stock 
or other securities shall only be treated as Registrable Securities if 
and so long as they have not been (A) sold to or through a broker or 
dealer or underwriter in a public distribution or a public securities 
transaction, or (B) sold in a transaction exempt from the registration 
and prospectus delivery requirements of the Securities Act under 
Section 4(1) thereof so that all transfer restrictions, and restrictive 
legends with respect thereto, if any, are removed upon the consummation 
of such sale;
(c)     The number of shares of "Registrable Securities 
then outstanding" shall be determined by the number of shares of Common 
Stock outstanding which are, and the number of shares of Common Stock 
issuable pursuant to then exercisable or convertible securities which 
are, Registrable Securities;
(d)     The term "Holder" means any person owning or 
having the right to acquire Registrable Securities or any assignee 
thereof in accordance with Section 1.11 of this Agreement;
(e)     The term "Form S-1" means such form under the 
Securities Act as in effect on the date hereof or any successor form 
under the Securities Act;
(f)     The term "Form S-3" means such form under the 
Securities Act as in effect on the date hereof or any successor form 
under the Securities Act; and
(g)     The term "SEC" means the Securities and Exchange 
Commission.
1.2     Form S-3 and Form S-1 Registration.  
(a)     Within thirty (30) days after the date hereof, 
the Company shall file with the SEC a registration statement on Form S-3 
covering all of the Registrable Securities and use its best efforts 
thereafter to effect such registration and all such qualifications and 
compliances as may be necessary and as would permit or facilitate the 
sale and distribution of all of the Registrable Securities; provided, 
however, that the Company shall not be obligated to effect any such 
registration, qualification or compliance pursuant to this 
Section 1.2(a):  (i) if Form S-3 is not available for such offering by 
the Holders; or (ii) in any particular jurisdiction in which the Company 
would be required to qualify to do business or to execute a general 
consent to service of process in effecting such registration, 
qualification or compliance.
(b)     In the event that a registration on Form S-3 is 
not available to the Company or if the effectiveness of the Form S-3 is 
suspended or terminated at any time within the two (2) year period 
following the date hereof, then the Company shall give written notice to 
all Holders and shall use its best efforts to effect as soon as 
practicable the registration on Form S-1 of all Registrable Securities 
which the Holders request to be registered pursuant to such request and 
all such qualifications and compliances as may be necessary and as would 
permit or facilitate the sale and distribution of all of the Registrable 
Securities requested to be registered; provided, however, that the 
Company shall not be obligated to effect any such registration, 
qualification or compliance pursuant to this Section 1.2(b):  (i) if 
Form S-1 is not available for such offering by the Holders; (ii) after 
the Company has effected two (2) registrations pursuant to this 
Section 1.2(b) and such registrations have been declared or ordered 
effective; (iii) if one registration pursuant to this Section 1.2(b) has 
been filed within the previous six (6) months of the date upon which a 
demand pursuant to this Section 1.2(b) has been made and has been 
declared or ordered effective; (iv) after the second anniversary of the 
date hereof; or (v) in any particular jurisdiction in which the Company 
would be required to qualify to do business or to execute a general 
consent to service of process in effecting such registration, 
qualification or compliance.
1.3     Company Registration.  If (but without any obligation 
to do so) the Company proposes to register (including for this purpose a 
registration effected by the Company for stockholders other than the 
Holders) any of its stock under the Securities Act in connection with 
the public offering of such securities solely for cash (other than a 
registration relating solely to the sale of securities to participants 
in a Company stock plan or a transaction covered by Rule 145 under the 
Securities Act, a registration in which the only stock being registered 
is Common Stock issuable upon conversion of debt securities which are 
also being registered, or any registration on any form which does not 
include substantially the same information as would be required to be 
included in a registration statement covering the sale of the 
Registrable Securities), the Company shall, at such time, promptly give 
each Holder written notice of such registration.  Upon the written 
request of each Holder given within twenty (20) days after mailing of 
such notice by the Company in accordance with Section 3.3, the Company 
shall, subject to the provisions of Section 1.7, cause to be registered 
under the Securities Act all of the Registrable Securities that each 
such Holder has requested to be registered.
1.4     Obligations of the Company.  Whenever required under 
this Section 1 to effect the registration of any Registrable Securities, 
the Company shall, as expeditiously as reasonably possible:
(a)     Prepare and file with the SEC a registration 
statement with respect to such Registrable Securities and use its best 
efforts to cause such registration statement to become effective and 
keep such registration statement effective until two (2) years after the 
date hereof.
(b)     Prepare and file with the SEC such amendments 
and supplements to such registration statement and the prospectus used 
in connection with such registration statement as may be necessary to 
comply with the provisions of the Securities Act with respect to the 
disposition of all securities covered by such registration statement 
until two (2) years after the date hereof.
(c)     Furnish to the Holders (and to each underwriter, 
if any) such numbers of copies of a prospectus, including a preliminary 
prospectus, in conformity with the requirements of the Securities Act, 
and such other documents as they may reasonably request in order to 
facilitate the disposition of Registrable Securities owned by them.
(d)     Use its best efforts to register and qualify the 
securities covered by such registration statement under such other 
securities or Blue Sky laws of such jurisdictions as shall be reasonably 
requested by the Holders, provided that the Company shall not be 
required in connection therewith or as a condition thereto to qualify to 
do business or to file a general consent to service of process in any 
such states or jurisdictions.
(e)     Before filing the registration statement or 
prospectus, or amendments or supplements thereto, furnish to counsel 
selected by the participating Holders copies of such documents proposed 
to be filed which shall be subject to the reasonable approval of such 
counsel.
(f)     In the event of any underwritten public 
offering, enter into and perform its obligations under an underwriting 
agreement, in usual and customary form, with the managing underwriter of 
such offering.  Each Holder participating in such underwriting shall 
also enter into and perform its obligations under such an agreement.
(g)     Notify each Holder of Registrable Securities 
covered by such registration statement at any time when a prospectus 
relating thereto is required to be delivered under the Securities Act of 
the happening of any event as a result of which the prospectus included 
in such registration statement, as then in effect, includes an untrue 
statement of a material fact or omits to state a material fact required 
to be stated therein or necessary to make the statements therein not 
misleading in the light of the circumstances then existing and promptly 
file such amendments and supplements as may be necessary so that, as 
thereafter delivered to such Holders of such Registrable Securities, 
such prospectus shall not include an untrue statement of a material fact 
or omit to state a material fact necessary to make the statements made 
therein, in the light of the circumstances under which they were made, 
not misleading and use its best efforts to cause each such amendment and 
supplement to become effective.
(h)     Cause all such Registrable Securities registered 
pursuant hereunder to be listed on each securities exchange on which 
similar securities issued by the Company are then listed.
(i)     Provide a transfer agent and registrar for all 
Registrable Securities registered pursuant hereunder and a CUSIP number 
for all such Registrable Securities, in each case not later than the 
effective date of such registration.
(j)     Use its best efforts to furnish, at the request 
of any Holder requesting registration of Registrable Securities pursuant 
to this Section 1, on the date that such Registrable Securities are 
delivered to the underwriters for sale in connection with a registration 
pursuant to this Section 1, if such securities are being sold through 
underwriters, or, if such securities are not being sold through 
underwriters, on the date that the registration statement with respect 
to such securities becomes effective, (i) an opinion, dated such date, 
of the counsel representing the Company for the purposes of such 
registration, in form and substance as is customarily given to 
underwriters in an underwritten public offering, addressed to the 
underwriters, if any, and to the Holders requesting registration of 
Registrable Securities and (ii) a letter dated such date, from the 
independent certified public accountants of the Company, in form and 
substance as is customarily given by independent certified public 
accountants to underwriters in an underwritten public offering, 
addressed to the underwriters, if any, and to the Holders requesting 
registration of Registrable Securities.
1.5     Furnish Information.  It shall be a condition 
precedent to the obligations of the Company to take any action pursuant 
to this Section 1 with respect to the Registrable Securities of any 
selling Holder that such Holder shall furnish to the Company such 
information regarding itself, the Registrable Securities held by it, and 
the intended method of disposition of such securities as shall be 
required to effect the registration of such Holder's Registrable 
Securities.
1.6     Expenses of Registration.  All expenses other than 
underwriting discounts and commissions incurred in connection with 
registrations, filings or qualifications of Registrable Securities 
pursuant to Sections 1.2 or 1.3 for each Holder (which right may be 
assigned as provided in Section 1.11), including (without limitation) 
all registration, filing, and qualification fees, printers' and 
accounting fees and fees and disbursements of counsel for the Company 
shall be borne by the Company.
1.7     Underwriting Requirements.  In connection with any 
offering involving an underwriting of shares of the Company's capital 
stock, the Company shall not be required under Section 1.3 to include 
any of the Holders' securities in such underwriting unless they accept 
the terms of the underwriting as agreed upon between the Company and the 
underwriters selected by it (or by other persons entitled to select the 
underwriters), and then only in such quantity as the underwriters 
determine in good faith will not jeopardize the success of the offering 
by the Company.  If the total amount of securities, including 
Registrable Securities, requested by stockholders to be included in such 
offering exceeds the amount of securities sold other than by the Company 
that the underwriters determine in good faith is compatible with the 
success of the offering, then the Company shall be required to include 
in the offering only that number of such securities, including 
Registrable Securities, which the underwriters determine in good faith 
will not jeopardize the success of the offering (the securities so 
included to be apportioned pro rata among the selling stockholders 
according to the total amount of securities entitled to be included 
therein owned by each selling stockholder or in such other proportions 
as shall mutually be agreed to by such selling stockholders) but in no 
event shall the amount of securities of the selling Holders included in 
the offering be reduced below twenty-five percent (25%) of the total 
amount of securities included in such offering.  For purposes of the 
preceding parenthetical concerning apportionment, for any selling 
stockholder which is a holder of Registrable Securities and which is a 
partnership or corporation, the partners, retired partners and 
stockholders of such holder, or the estates and family members of any 
such partners and retired partners and any trusts for the benefit of any 
of the foregoing persons shall be deemed to be a single "selling 
stockholder," and any pro-rata reduction with respect to such "selling 
stockholder" shall be based upon the aggregate amount of shares carrying 
registration rights owned by all entities and individuals included in 
such "selling stockholder," as defined in this sentence.
1.8     Delay of Registration.  No Holder shall have any right 
to obtain or seek an injunction restraining or otherwise delaying any 
such registration as the result of any controversy that might arise with 
respect to the interpretation or implementation of this Section 1.
1.9     Indemnification.  In the event any Registrable 
Securities are included in a registration statement under this 
Section 1:
(a)     To the extent permitted by law, the Company will 
indemnify and hold harmless each Holder, any underwriter (as defined in 
the Securities Act) for such Holder and each person, if any, who 
controls such Holder or underwriter within the meaning of the Securities 
Act or the Securities Exchange Act of 1934, as amended (the "Exchange 
Act"), and each officer, director, employee or agent thereof, against 
any losses, claims, damages, or liabilities (joint or several) to which 
they may become subject under the Securities Act, the Exchange Act or 
other federal or state law, insofar as such losses, claims, damages, or 
liabilities (or actions in respect thereof) arise out of or are based 
upon any of the following statements, omissions or violations 
(collectively a "Violation"):  (i) any untrue statement or alleged 
untrue statement of a material fact contained in such registration 
statement, including any preliminary prospectus or final prospectus 
contained therein or any amendments or supplements thereto, (ii) the 
omission or alleged omission to state therein a material fact required 
to be stated therein, or necessary to make the statements therein not 
misleading, or (iii) any violation or alleged violation by the Company 
of the Securities Act, the Exchange Act, any state securities law or any 
rule or regulation promulgated under the Securities Act, the Exchange 
Act or any state securities law; and the Company will pay to each such 
Holder, underwriter or controlling person and each officer, director, 
employee or agent thereof, as incurred, any legal or other expenses 
reasonably incurred by them in connection with investigating or 
defending any such loss, claim, damage, liability, or action; provided, 
however, that the indemnity agreement contained in this 
subsection 1.9(a) shall not apply to amounts paid in settlement of any 
such loss, claim, damage, liability, or action if such settlement is 
effected without the consent of the Company (which consent shall not be 
unreasonably withheld), nor shall the Company be liable to any Holder, 
underwriter or controlling person for any such loss, claim, damage, 
liability, or action to the extent that it arises out of or is based 
upon a Violation which occurs in reliance upon and in conformity with 
written information furnished expressly for use in connection with such 
registration by any such Holder, underwriter or controlling person.
(b)     To the extent permitted by law, each selling 
Holder will severally (and not jointly) indemnify and hold harmless the 
Company, each of its directors, each of its officers who has signed the 
registration statement, each person, if any, who controls the Company 
within the meaning of the Securities Act, any underwriter, any other 
Holder selling securities in such registration statement and any 
controlling person of any such underwriter or other Holder, against any 
losses, claims, damages, or liabilities (joint or several) to which any 
of the foregoing persons may become subject, under the Securities Act, 
the Exchange Act or other federal or state law, insofar as such losses, 
claims, damages, or liabilities (or actions in respect thereto) arise 
out of or are based upon any Violation, in each case to the extent (and 
only to the extent) that such Violation occurs in reliance upon and in 
conformity with written information furnished by such Holder expressly 
for use in connection with such registration; and each such Holder will 
pay, as incurred, any legal or other expenses reasonably incurred by any 
person intended to be indemnified pursuant to this subsection 1.9(b), in 
connection with investigating or defending any such loss, claim, damage, 
liability, or action; provided, however, that the indemnity agreement 
contained in this subsection 1.9(b) shall not apply to amounts paid in 
settlement of any such loss, claim, damage, liability or action if such 
settlement is effected without the consent of the Holder, which consent 
shall not be unreasonably withheld; provided, that in no event shall any 
indemnity under this subsection 1.9(b) exceed the net proceeds from the 
offering received by such Holder, except in the case of willful fraud by 
such Holder.
(c)     Promptly after receipt by an indemnified party 
under this Section 1.9 of notice of the commencement of any action 
(including any governmental action), such indemnified party will, if a 
claim in respect thereof is to be made against any indemnifying party 
under this Section 1.9, deliver to the indemnifying party a written 
notice of the commencement thereof and the indemnifying party shall have 
the right to participate in, and, to the extent the indemnifying party 
so desires, jointly with any other indemnifying party similarly noticed, 
to assume the defense thereof with counsel mutually satisfactory to the 
parties; provided, however, that an indemnified party (together with all 
other indemnified parties which may be represented without conflict by 
one counsel) shall have the right to retain one separate counsel, with 
the reasonable fees and expenses to be paid by the indemnifying party, 
if representation of such indemnified party by the counsel retained by 
the indemnifying party would be inappropriate due to actual or potential 
differing interests between such indemnified party and any other party 
represented by such counsel in such proceeding.  The failure to deliver 
written notice to the indemnifying party within a reasonable time of the 
commencement of any such action, if prejudicial to its ability to defend 
such action, shall relieve such indemnifying party of any liability to 
the indemnified party under this Section 1.9, but the omission so to 
deliver written notice to the indemnifying party will not relieve it of 
any liability that it may have to any indemnified party otherwise than 
under this Section 1.9.
(d)     If the indemnification provided for in this 
Section 1.9 is held by a court of competent jurisdiction to be 
unavailable to an indemnified party with respect to any loss, liability, 
claim, damage or expense referred to therein, then the indemnifying 
party, in lieu of indemnifying such indemnified party hereunder, shall 
contribute to the amount paid or payable by such indemnified party as a 
result of such loss, liability, claim, damage, or expense in such 
proportion as is appropriate to reflect the relative fault of the 
indemnifying party on the one hand and of the indemnified party on the 
other in connection with the statements or omissions that resulted in 
such loss, liability, claim, damage or expense as well as any other 
relevant equitable considerations; provided, that in no event shall any 
contribution by a Holder under this subsection 1.9(d) exceed the net 
proceeds from the offering received by such Holder, except in the case 
of willful fraud by such Holder.  The relative fault of the indemnifying 
party and of the indemnified party shall be determined by reference to, 
among other things, whether the untrue or alleged untrue statement of a 
material fact or the omission to state a material fact relates to 
information supplied by the indemnifying party or by the indemnified 
party and the parties' relative intent, knowledge, access to 
information, and opportunity to correct or prevent such statement or 
omission.
(e)     Notwithstanding the foregoing, to the extent 
that the provisions on indemnification and contribution contained in the 
underwriting agreement entered into in connection with the underwritten 
public offering are in conflict with the foregoing provisions, the 
provisions in the underwriting agreement shall control.
(f)     The obligations of the Company and Holders under 
this Section 1.9 shall survive the completion of any offering of 
Registrable Securities in a registration statement under this Section 1, 
and otherwise (and, to the extent permitted by law, any investigation 
made by or on behalf of the indemnified party or any officer, director 
or controlling person of such indemnified party).
1.10    Reports Under Securities Exchange Act of 1934.  With a 
view to making available to the Holders the benefits of Rule 144 
promulgated under the Securities Act and any other rule or regulation of 
the SEC that may at any time permit a Holder to sell securities of the 
Company to the public without registration or pursuant to a registration 
on Form S-3, the Company agrees to:
(a)     make and keep public information available, as 
those terms are understood and defined in SEC Rule 144 at all times;
(b)     take such action, including the voluntary 
registration of its Common Stock under Section 12 of the Exchange Act, 
as is necessary to enable the Holders to utilize Form S-3 for the sale 
of their Registrable Securities;
(c)     file with the SEC in a timely manner all reports 
and other documents required of the Company under the Securities Act and 
the Exchange Act; and
(d)     furnish to any Holder, so long as the Holder 
owns any Registrable Securities, forthwith upon request (i) a written 
statement by the Company that it has complied with the reporting 
requirements of SEC Rule 144, the Securities Act and the Exchange Act or 
that it qualifies as a registrant whose securities may be resold 
pursuant to Form S-3, (ii) a copy of the most recent annual or quarterly 
report of the Company and such other reports and documents so filed by 
the Company, and (iii) such other information as may be reasonably 
requested in availing any Holder of any rule or regulation of the SEC 
which permits the selling of any such securities without registration or 
pursuant to such form.
1.11    Assignment of Registration Rights.  The rights to 
cause the Company to register Registrable Securities pursuant to this 
Section 1 may be assigned (but only with all related obligations) by a 
Holder to a transferee or assignee of at least 100,000 shares or all of 
such securities, provided the Company is, within a reasonable time after 
such transfer, furnished with written notice of the name and address of 
such transferee or assignee and the securities with respect to which 
such registration rights are being assigned; and provided, further, that 
such assignment shall be effective only if immediately following such 
transfer the further disposition of such securities by the transferee or 
assignee is restricted under the Securities Act.  For the purposes of 
determining the number of shares of Registrable Securities held by a 
transferee or assignee, the holdings of transferees and assignees of a 
partnership who are partners or retired partners of such partnership 
(including spouses and ancestors, lineal descendants and siblings of 
such partners or spouses who acquire Registrable Securities by gift, 
will or intestate succession) shall be aggregated together and with the 
partnership; provided that all assignees and transferees who would not 
qualify individually for assignment of registration rights shall have a 
single attorney-in-fact for the purpose of exercising any rights, 
receiving notices or taking any action under Section 1.
1.12    Termination of Registration Rights.  No Holder shall 
be entitled to exercise any right provided for in this Section 1 after 
the earlier of (i) two (2) years after the date hereof or (ii) such time 
as Rule 144 or another similar exemption under the Securities Act is 
available for the sale of all of such Holder's shares during a three (3) 
month period without registration.
1.13    Restrictions on and Procedure for Sales.  Each 
Investor shall comply with following procedures:
(a)     If any Investor shall propose to sell any 
Registrable Securities pursuant to a registration statement filed by the 
Company pursuant to Section 1.2 or 1.3, the Investor shall notify the 
Company of its intent to do so at least three (3) full business days 
prior to such sale (the "Notice of Sale"), and the provision of the 
Notice of Sale to the Company shall conclusively be deemed to establish 
an agreement by such Investor to comply with the registration provisions 
herein described.  The Notice of Sale shall be deemed to constitute a 
representation that any information previously supplied by such Investor 
is accurate as of the date of such Notice of Sale.
(b)     The Notice of Sale in substantially the form 
attached as Exhibit B shall be delivered to the Company at the address 
shown on Exhibit A in writing in accordance with Section 3.3.  However, 
the Investor may give the Notice of Sale orally by telephoning Mark 
Fischer-Colbrie or the then current Chief Financial Officer of the 
Company at (510) 353-3000.  An oral Notice of Sale shall be deemed to 
have been received only at such time as the selling Investor speaks 
directly with Mr. Fischer-Colbrie (or such then current Chief Financial 
Officer).  In addition, an oral Notice of Sale shall only be deemed 
effective if it is followed by a written Notice of Sale received by the 
Company by personal delivery or facsimile within twenty-four (24) hours 
after giving the oral Notice of Sale.
(c)     Unless the Company has notified the selling 
Investor in writing that the Company will not refuse the sale of 
Registrable Securities identified in a Notice of Sale pursuant to this 
Section 1.13(c), at any time within such three (3) business-day period, 
the Company may refuse to permit the Investor to sell any Restricted 
Securities; provided, however, that in order to exercise this right, the 
Company must deliver a certificate in writing from an officer of the 
Company to the Investor to the effect that a delay in such sale is 
necessary because a sale pursuant to the Registration Statement in its 
then current form could constitute a violation of the federal securities 
laws.  In no event shall such delay exceed ten (10) trading days; 
provided, however, that if, prior to the expiration of such ten (10) 
trading day period, the Company delivers a certificate in writing from 
an officer of the Company to the Investor to the effect that the Board 
of Directors of the Company has determined in reasonable good faith that 
a further delay in such sale beyond such ten (10) trading day period is 
necessary because a sale pursuant to such Registration Statement in its 
then current form could constitute a violation of the federal securities 
laws, the Company may refuse to permit such Investor to resell any 
Shares for an additional period not to exceed ten (10) trading days.  
The Company shall not exercise this right of delay for more than twenty 
(20) consecutive trading days or for more than thirty (30) trading days 
in any six (6) month period, provided, however, that in the event the 
ability of the Investors to sell Registrable Securities under the Form 
S-3 or Form S-1 is delayed or suspended for any reason during the two-
year period following the date hereof, the aggregate thirty (30) trading 
day limitation shall be reduced by the number of trading days the 
Investors are restricted from selling the Registrable Securities.
(d)     Unless the Company delivers a certificate in 
writing to the selling Investor pursuant to Section 1.13(c), the selling 
Investor shall have thirty (30) trading days after the Notice of Sale in 
which to complete the transaction identified in the Notice of Sale (the 
"Trading Window").  Any period of delay pursuant to Section 1.13(c) 
shall extend the Trading Window on a day by day basis.
2.      Right of First Offer.  Subject to the terms and conditions 
specified in this Section 2, the Company hereby grants to each Investor 
(as hereinafter defined) a right of first offer with respect to future 
sales by the Company of its Shares (as hereinafter defined).  An 
Investor who chooses to exercise the right of first offer may designate 
as purchasers under such right itself or its partners or affiliates in 
such proportions as it deems appropriate.  Each time the Company 
proposes to offer any shares of, or securities convertible into or 
exercisable for any shares of, any class of its capital stock 
("Shares"), the Company shall first make an offering of such Shares to 
each Investor in accordance with the following provisions:
(a)     The Company shall deliver a notice by certified 
mail ("Notice") to the Investors stating (i) its bona fide intention to 
offer such Shares, (ii) the number of such Shares to be offered, and 
(iii) the price and terms, if any, upon which it proposes to offer such 
Shares.
(b)     Within 15 calendar days after delivery of the 
Notice, the Investor may elect to purchase or obtain, at the price and 
on the terms specified in the Notice, up to that portion of such Shares 
which equals the proportion that the number of shares of Common Stock 
issued and held, or issuable upon conversion and exercise of all 
convertible or exercisable securities then held, by such Investor bears 
to the total number of shares of Common Stock then outstanding (assuming 
full conversion and exercise of all convertible or exercisable 
securities).  The Company shall promptly, in writing, inform each 
Investor that purchases all the shares available to it (each, a 
"Fully-Exercising Investor") of any other Investor's failure to do 
likewise.  During the ten (10)-day period commencing after receipt of 
such information, each Fully-Exercising Investor shall be entitled to 
obtain that portion of the Shares for which Investors were entitled to 
subscribe but which were not subscribed for by the Investors that is 
equal to the proportion that the number of shares of Common Stock issued 
and held, or issuable upon conversion and exercise of all convertible or 
exercisable securities then held, by such Fully-Exercising Investor 
bears to the total number of shares of Common Stock then outstanding 
(assuming full conversion and exercise of all convertible or exercisable 
securities).
(c)     The Company may, during the 45-day period 
following the expiration of the period provided in subsection 2(b) 
hereof, offer and sell the remaining unsubscribed portion of the Shares 
to any person or persons at a price not less than, and upon terms no 
more favorable to the offeree than those specified in the Notice.  If 
the Company does not enter into an agreement for the sale of the Shares 
within such period and if such agreement is not consummated within such 
period, the right provided hereunder shall be deemed to be revived and 
such Shares shall not be offered unless first reoffered to the Investors 
in accordance herewith.
(d)     The right of first offer in this paragraph 2 
shall not be applicable (i) to the issuance or sale of shares of Common 
Stock (or options therefor) to employees, consultants and directors, 
pursuant to plans or agreements approved by the Board of Directors, (ii) 
to the issuance of securities pursuant to the conversion or exercise of 
convertible or exercisable securities, (iii) to the issuance of 
securities in connection with a bona fide business acquisition of or by 
the Company, whether by merger, consolidation, sale of assets, sale or 
exchange of stock or otherwise, (iv) to the issuance of securities to 
financial institutions or lessors in connection with commercial credit 
arrangements, equipment financings, or similar transactions or (v) to 
the issuance of the Series A Participating Preferred Stock.
(e)     Notwithstanding the foregoing, the right of 
first offer in this Section 2 shall terminate (i) with respect to any 
Investor whose shares of Series B Convertible Preferred Stock are 
converted into shares of Common Stock of the Company, or (ii) when the 
Company shall sell, convey, or otherwise dispose of or encumber all or 
substantially all of its property or business or merge into or 
consolidate with any other corporation (other than a wholly-owned 
subsidiary corporation) or effect any other transaction or series of 
related transactions in which more than fifty percent (50%) of the 
voting power of the Company is disposed of.  
3.      Miscellaneous.
3.1     Successors and Assigns.  Except as otherwise provided 
in this Agreement, the terms and conditions of this Agreement shall 
inure to the benefit of and be binding upon the respective permitted 
successors and assigns of the parties (including transferees of any of 
the Series B Convertible Preferred Stock or any Common Stock issued upon 
conversion thereof).  Nothing in this Agreement, express or implied, is 
intended to confer upon any party other than the parties hereto or their 
respective successors and assigns any rights, remedies, obligations, or 
liabilities under or by reason of this Agreement, except as expressly 
provided in this Agreement.
3.2     Amendments and Waivers.  Any term of this Agreement 
may be amended or waived only with the written consent of (i) the 
Company, (ii) the holders of a majority of the Registrable Securities 
then outstanding, and (iii) Johnson & Johnson Development Corporation if 
its obligations hereunder are materially increased by such amendment.  
Any amendment or waiver effected in accordance with this paragraph shall 
be binding upon each future holder of all such Registrable Securities 
and the Company.
3.3     Notices.  Unless otherwise provided, any notice 
required or permitted by this Agreement shall be in writing and shall be 
deemed sufficient upon delivery, when delivered personally or by 
overnight courier or sent by telegram or fax, or forty-eight (48) hours 
after being deposited in the U.S. mail, as certified or registered mail, 
with postage prepaid, and addressed to the party to be notified at such 
party's address or fax number as set forth on the signature page on 
Exhibit A hereto or as subsequently modified by written notice.
3.4     Severability.  If one or more provisions of this 
Agreement are held to be unenforceable under applicable law, the parties 
agree to renegotiate such provision in good faith.  In the event that 
the parties cannot reach a mutually agreeable and enforceable 
replacement for such provision, then (a) such provision shall be 
excluded from this Agreement, (b) the balance of the Agreement shall be 
interpreted as if such provision were so excluded and (c) the balance of 
the Agreement shall be enforceable in accordance with its terms.
3.5     Governing Law.  This Agreement and all acts and 
transactions pursuant hereto shall be governed, construed and 
interpreted in accordance with the laws of the State of California, 
without giving effect to principles of conflicts of laws.
3.6     Counterparts.  This Agreement may be executed in two 
or more counterparts, each of which shall be deemed an original, but all 
of which together shall constitute one and the same instrument.
3.7     Titles and Subtitles.  The titles and subtitles used 
in this Agreement are used for convenience only and are not to be 
considered in construing or interpreting this Agreement.
3.8     Aggregation of Stock.  All shares of the Preferred 
Stock held or acquired by affiliated entities or persons shall be 
aggregated together for the purpose of determining the availability of 
any rights under this Agreement.


[Signature Page Follows]

The parties have executed this Investors' Rights Agreement as of 
the date first above written.
                                                COMPANY:
KeraVision, Inc.

By:  /s/Mark Fischer-Colbrie    

Name:  Mark Fischer-Colbrie     
(print)
Title: VP Finance/Admin; CFO    



INVESTORS:

DLJ Capital Corp.

By: /s/Kathleen D. LaPorte      

Name:  Kathleen D. LaPorte      

Title:   General Partner and 
Attorney in Fact        


DLJ ESC II, L.P.
By:  DLJ LBO Plans Management 
Corporation
Its:  Manager

By: /s/Kathleen D. LaPorte      

Name:  Kathleen D. LaPorte      

Title: Attorney In Fact 


Sprout Capital VIII, L.P.
By: DLJ Capital Corp.
Its: Managing General Partner

By:  /s/Kathleen D. LaPorte     

Name:  Kathleen D. LaPorte      

Title:  General Partner and 
Attorney in Fact        

Sprout Venture Capital, L.P.
By: DLJ Capital Corp.
Its: Managing General Partner

By:  /s/Kathleen D. LaPorte     

Name:  Kathleen D. LaPorte      

Title:  General Partner and 
Attorney in Fact        

The Sprout CEO Fund, L.P.
By: DLJ Capital Corp.
Its: General Partner

By:  /s/Kathleen D. LaPorte     

Name:  Kathleen D. LaPorte      

Title:  General Partner and 
Attorney in Fact        

Johnson & Johnson Development 
Corporation

By: /s/Blair M. Flicker 

Name: Blair M. Flicker  

Title:  Vice President  


GMI/DRI INVESTMENT TRUST

By: /s/David B. Van Benschoten  

Name:   David B. Van 
Benschoten      

Title:   Executive Secretary - 
Benefit
           Finance Committee 
of General Mills,
           Inc. as Named 
Financial Fiduciary




Special Situations Private 
Equity Fund, LP

By: /s/Austin Marxe     

Name:  Austin Marxe     

Title:  Managing Director       


Special Situations Fund III, LP

By: /s/Austin Marxe     

Name:  Austin Marxe     

Title:  Managing Director       


Special Situations Cayman Fund, 
LP

By: /s/Austin Marxe     

Name:  Austin Marxe     

Title: Managing Director        



Exhibit 23.1

CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

We consent to the reference to our firm under the caption 
"Experts" in the Registration Statement (Form S-3) and related 
Prospectus of Keravision, Inc. for the registration of 2,565,000 shares 
of its common stock and to the incorporation by reference therein of our 
report dated February 5, 1998, with respect to the consolidated 
financial statements of KeraVision, Inc. included in its Annual Report 
(Form 10-K) for the year ended December 31, 1997, filed with the 
Securities and Exchange Commission




/s/Ernst & 
Young LLP
San Jose, California
July 9, 1998



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