<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 3)*
Escalon Medical Corp.
(Formerly Intelligent Surgical Lasers, Inc.)
(Name of Issuer)
Common Stock No Par Value
(Title of Class of Securities)
457965309
(CUSIP Number)
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
<PAGE>
- ----------------------- ---------------------
CUSIP NO. 457965309 13G PAGE 2 OF 19 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Oak Investment Partners IV, Limited Partnership
06-1237975
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
Delaware
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF 281,116 Shares of Common Stock
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
Not Applicable
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING 281,116 Shares of Common Stock
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
Not Applicable
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
281,116 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
2.7%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
PN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ---------------------
CUSIP NO. 457965309 13G PAGE 3 OF 19 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Oak Associates IV, Limited Partnership
06-1237974
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
Delaware
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF Not Applicable
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
281,116 of Common Stock
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING Not Applicable
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
281,116 Shares of Common Stock
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
281,116 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
2.7%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
PN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ----------------------
CUSIP NO. 457965309 13G PAGE 4 OF 19 PAGES
- ----------------------- ----------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Oak IV Affiliates Fund, Limited Partnership
06-1256163
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
Delaware
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF 4,884 Shares of Common Stock
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
Not Applicable
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING 4,884 Shares of Common Stock
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
Not applicable
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
4,884 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
Less than 0.1%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
PN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ----------------------
CUSIP NO. 457965309 13G PAGE 5 OF 19 PAGES
- ----------------------- ----------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Oak IV Affiliates
06-1256164
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
Delaware
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF Not Applicable
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
4,884 Shares of Common Stock
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING Not Applicable
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
4,884 Shares of Common Stock
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
4,884 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
Less than 0.1%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
PN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ---------------------
CUSIP NO. 457965309 13G PAGE 6 OF 19 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Oak Management Corporation
06-0990851
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
Delaware
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF Not Applicable
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
286,000 Shares of Common Stock
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING Not Applicable
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
2.7%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
CO
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ---------------------
CUSIP NO. 457965309 13G PAGE 7 OF 19 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Bandel L. Carano
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
United States
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF Not Applicable
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
286,000 Shares of Common Stock
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING Not Applicable
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
2.7%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
IN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ---------------------
CUSIP NO. 457965309 13G PAGE 8 OF 19 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Gerald R. Gallagher
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
United States
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF Not Applicable
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
286,000 Shares of Common Stock
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING Not Applicable
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
2.7%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
IN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ---------------------
CUSIP NO. 457965309 13G PAGE 9 OF 19 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Edward F. Glassmeyer
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
United States
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF Not Applicable
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
286,000 Shares of Common Stock
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING Not Applicable
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
2.7%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
IN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ---------------------
CUSIP NO. 457965309 13G PAGE 10 OF 19 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Fredric W. Harman
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
United States
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF Not Applicable
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
286,000 Shares of Common Stock
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING Not Applicable
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
2.7%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
IN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ---------------------
CUSIP NO. 457965309 13G PAGE 11 OF 19 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Ann H. Lamont
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
United States
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF Not Applicable
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
286,000 Shares of Common Stock
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING Not Applicable
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
2.7%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
IN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
- ----------------------- ---------------------
CUSIP NO. 457965309 13G PAGE 12 OF 19 PAGES
- ----------------------- ---------------------
- ------------------------------------------------------------------------------
NAME OF REPORTING PERSON
1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Eileen M. More
- ------------------------------------------------------------------------------
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
2 (a) [_]
(b) [_]
- ------------------------------------------------------------------------------
SEC USE ONLY
3
- ------------------------------------------------------------------------------
CITIZENSHIP OR PLACE OF ORGANIZATION
4
United States
- ------------------------------------------------------------------------------
SOLE VOTING POWER
5
NUMBER OF Not Applicable
SHARES -----------------------------------------------------------
SHARED VOTING POWER
BENEFICIALLY 6
286,000 Shares of Common Stock
OWNED BY
-----------------------------------------------------------
EACH SOLE DISPOSITIVE POWER
7
REPORTING Not Applicable
PERSON -----------------------------------------------------------
SHARED DISPOSITIVE POWER
WITH 8
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
9
286,000 Shares of Common Stock
- ------------------------------------------------------------------------------
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
[_]
- ------------------------------------------------------------------------------
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11
2.7%
- ------------------------------------------------------------------------------
TYPE OF REPORTING PERSON*
12
IN
- ------------------------------------------------------------------------------
*SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
Page 13 of 19 pages
Schedule 13G
Amendment No. 3
Common Stock, No Par Value
CUSIP No. 457965309
Item 1(a) Name of Issuer:
Escalon Medical Corp. (formerly Intelligent
Surgical Lasers, Inc.)
Item 1(b) Address of Issuer's Principal Executive Offices:
182 Tamarack Avenue
Skillman, NJ 08558
Item 2(a) Name of Person filing:
Oak Investment Partners IV, Limited Partnership
Oak Associates IV, Limited Partnership
Oak IV Affiliates Fund, Limited Partnership
Oak IV Affiliates
Oak Management Corporation
Bandel L. Carano
Gerald R. Gallagher
Edward F. Glassmeyer
Fredric W. Harman
Ann H. Lamont
Eileen M. More
Item 2(b) Address of Principal Business Office or, if none,
Residence:
c/o Oak Management Corporation
One Gorham Island
Westport, CT 06880
Item 2(c) Citizenship:
Please refer to Item 4 on each cover sheet for each filing person
Item 2(d) Title of Class of Securities:
Common stock, no par value
Item 2(e) CUSIP Number: 457965309
Item 3 Not Applicable.
<PAGE>
Item 4 Ownership.
The approximate percentages of shares of Common Stock reported as
beneficially owned by the Reporting Entities is based upon 10,360,814 shares
outstanding as of November 1, 1996, as reported in the Issuer's Quarterly Report
on Form 10-Q for the fiscal quarter ended September 30, 1996, plus the shares
issuable upon the exercise of the warrants described in the following sentence.
Amounts shown as beneficially owned include currently exercisable Warrants to
purchase 107,116 shares of Common Stock and 4,884 shares of Common Stock held by
Oak Investment Partners IV, Limited Partnership, and Oak IV Affiliates Fund,
Limited Partnership, respectively.
Please see Items 5, 6, 7, 8, 9 and 11 for each cover sheet for each filing
entity.
Item 5 Ownership of Five Percent or Less of a Class.
If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following [X].
Item 6 Ownership of More than Five Percent on Behalf of Another Person.
Not applicable
Item 7 Identification and Classification of the Subsidiary Which
Acquired the Security Being Reported on By the Parent Holding
Company.
Not applicable
Item 8 Identification and Classification of Members of the Group.
Not applicable
Item 9 Notice of Dissolution of Group.
Not applicable
Item 10 Certification.
Not applicable
<PAGE>
Signature
- ---------
After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
Dated February 13, 1997
Oak Investment Partners IV,
Limited Partnership
By: Oak Associates IV,
Limited Partnership,
As General Partner
By: /s/ Edward F. Glassmeyer
-------------------------------
General Partner
Oak Associates IV, Limited Partnership
By: /s/ Edward F. Glassmeyer
-------------------------------
General Partner
Oak IV Affiliates Fund, Limited
Partnership
By: Oak IV Affiliates, As General
Partner
By: /s/ Edward F. Glassmeyer
-------------------------------
General Partner
Oak IV Affiliates
By: /s/ Edward F. Glassmeyer
--------------------------------
General Partner
<PAGE>
OAK MANAGEMENT CORPORATION
By: /s/ Edward F. Glassmeyer
-------------------------------------
Name: Edward F. Glassmeyer
Title: President
/s/ Bandel L. Carano
------------------------------------
Bandel L. Carano
/s/ Fredric W. Harman
------------------------------------
Fredric W. Harman
/s/ Gerald R. Gallagher
------------------------------------
Gerald R. Gallagher
/s/ Edward F. Glassmeyer
------------------------------------
Edward F. Glassmeyer
/s/ Ann H. Lamont
------------------------------------
Ann H. Lamont
/s/ Eileen M. More
------------------------------------
Eileen M. More
<PAGE>
INDEX TO EXHIBITS
-----------------
Page
----
EXHIBIT A Agreement of Reporting Persons 18
<PAGE>
Exhibit A
---------
Each of the undersigned hereby agrees that Amendment No. 3 to the Schedule
13G filed on the date hereof with respect to the shares of Common Stock of
Escalon Medical Corp. has been filed on behalf of the undersigned.
Signature:
- ----------
Dated February 13, 1997
Oak Investment Partners IV,
Limited Partnership
By: Oak Associates IV,
Limited Partnership,
As General Partner
By: /s/ Edward F. Glassmeyer
-----------------------------
General Partner
Oak Associates IV, Limited Partnership
By: /s/ Edward F. Glassmeyer
------------------------------
General Partner
Oak IV Affiliates Fund, Limited
Partnership
By: Oak IV Affiliates, As General
Partner
By: /s/ Edward F. Glassmeyer
-------------------------------
General Partner
Oak IV Affiliates
By: /s/ Edward F. Glassmeyer
-------------------------------
General Partner
<PAGE>
OAK MANAGEMENT CORPORATION
By: /s/ Edward F. Glassmeyer
------------------------------------
Name: Edward F. Glassmeyer
Title: President
/s/ Bandel L. Carano
------------------------------------
Bandel L. Carano
/s/ Fredric W. Harman
------------------------------------
Fredric W. Harman
/s/ Gerald R. Gallagher
------------------------------------
Gerald R. Gallagher
/s/ Edward F. Glassmeyer
------------------------------------
Edward F. Glassmeyer
/s/ Ann H. Lamont
------------------------------------
Ann H. Lamont
/s/ Eileen M. More
------------------------------------
Eileen M. More
