Exhibit 10.2
Amendment 10 July 96



July 10, 1996

     Re:   Development   and  License   Agreement   between   Pharmacia   S.p.A.
     ("Pharmacia") and PDT, Inc. ("PDTI") dated July 1st, 1995, amended July 25,
     1995, September 11, 1995, and March 20, 1996 ("License Agreement")

Pharmacia and PDTI have entered into the License  Agreement  with respect to the
fields of Oncology,  Urology and Dermatology,  and now wish to amend the License
Agreement with respect to the field of Ophthalmology.

Pharmacia  and PDTI  agree to  amend  the  License  Agreement  according  to the
following terms and conditions:

Section 1.06.01 shall be inserted:

          "1.06.01   Ophthalmology   Effective  Date.  The  term  "Ophthalmology
          Effective Date" as used herein shall mean ___ of _________ , 1996."

Section 1.08 shall be deleted and replaced by:

          "1.08  Fields.  The term "Fields" as used herein shall mean the fields
          of Oncology, Urology, Dermatology and Ophthalmology,  unless otherwise
          indicated."

Section 1.24 shall be inserted as follows:

           "1.24 Other Indications.  The term "Other Indications" as used herein
           shall mean the  indications  in the  Fields as set forth in  Schedule
           1.24. The parties will agree on additional Other Indications  through
           the Operating Committee, based on criteria including, but not limited
           to, *****, ***** and ***** ."

The numbering on the remainder of Article I shall be amended accordingly.

Section 1.35 shall be deleted and replaced by:

          "1.35  Schedules.  The Schedules  which are attached to this Agreement
          and  which  are  herein   incorporated,   are  as  follows:   Schedule
          Description
                     1.17                 Major Indications
                     1.18                 Minor Indications
                     1.24                 Other Indications
                     3.04                 Key Countries
The following shall be added at the end of Section 3.01:

           "Pharmacia   intends  to  sublicense  its  rights  in  the  Field  of
           Ophthalmology to its affiliate,  Pharmacia & Upjohn AB. In respect to
           such Field, the parties intend for such affiliate to make all royalty
           and other  payments,  exercise all rights and perform all obligations
           directly to PDT."

Section 3.04.01 shall be inserted as follows:

           "3.04.01 Ophthalmology Milestones. Notwithstanding anything herein to
           the contrary, for Ophthalmology Major and Minor Indications Pharmacia
           shall pay PDTI only the following sums upon achievement of the stated
           milestones:

     (i) if,  after  conducting  *****  for any  Ophthalmology  Major  and Minor
Indication,  the Ophthalmology Operating Committee decides to proceed with *****
for such indication,  Pharmacia shall pay PDTI: ***** for each Major Indication;
and ***** for each Minor Indication;  or in the event ***** are not required for
any  indication  and the  Operating  Committee  decides to proceed  with  *****,
Pharmacia shall not owe PDTI a ***** milestone payment for each such indication;
and

     (ii) for each  Major and Minor  Indication,  at the ***** in one or more of
the Key Countries as specified by Schedule 3.04,  Pharmacia shall pay PDTI *****
for each Major  Indication so approved,  and ***** for each Minor  Indication so
approved.

     (iii)  Pharmacia  shall  not owe  PDTI any  milestone  payments  for  Other
Indications in Ophthalmology."


*****Confidential Treatment Requested



Section 3.05.01 shall be inserted as follows:

           "3.05.01 Ophthalmology Royalties.  Notwithstanding anything herein to
           the contrary,  for Ophthalmology,  Pharmacia or Pharmacia & Upjohn AB
           shall, for the term of the license specified by Section 3.02, pay PDT
           royalties  on Net Sales of  Product  to third  parties at the rate of
           ***** on total Net Sales of Product of *****, per calendar year and a
           royalty of ***** on the part of total Net Sales of Product  ***** per
           calendar year, *****.

Section 3.12 shall be inserted as follows:

           "3.12 Reimbursement.  Within fifteen (15) business days following the
           Ophthalmology  Effective Date, Pharmacia shall pay to PDTI the sum of
           Five Hundred Thousand US Dollars  ($500,000),  as  reimbursement  for
           prior  expenses  incurred  by PDTI in the  development  of SnET2  for
           Ophthalmology."

Section 4.01.01 shall be inserted as follows:

           "4.01.01  Ophthalmology  Strategic  Plan.   Notwithstanding  anything
           herein to the contrary,  for Ophthalmology,  the Strategic Plan shall
           be governed by the following provision: Unless otherwise agreed to by
           the  parties,  within one hundred  twenty  (120) days  following  the
           Ophthalmology  Effective  Date, the parties shall mutually  develop a
           written  plan,  the format and content as set forth in Section  4.01,
           with  respect  to  Ophthalmology.  This  plan  shall  be  called  the
           "Ophthalmology  Strategic Plan".  References to the Strategic Plan in
           the remainder of the Agreement shall also apply to the  Ophthalmology
           Strategic Plan, unless otherwise indicated."

Section 4.02.01 shall be inserted as follows:

          "4.02.01  Ophthalmology Steering Committee.  Notwithstanding  anything
          herein to the contrary, for Ophthalmology,  there shall be no Steering
          Committee.  References  to the Steering  Committee in the remainder of
          the Agreement shall apply to the Ophthalmology  Operating Committee as
          defined in Section 4.03.01, unless otherwise indicated."

Section 4.03.01 shall be inserted as follows:

           "4.03.01 Ophthalmology Operating Committee.  Notwithstanding anything
           herein to the contrary,  for Ophthalmology,  the Operating  Committee
           shall be governed by the following provision: Unless otherwise agreed
           to  by  the  parties,   within   thirty  (30)  days   following   the
           Ophthalmology   Effective   Date,   the  parties   shall  appoint  an
           "Ophthalmology  Operating  Committee",   having  the  membership  and
           purpose  as  set  forth  in  Section   4.03,   with  respect  to  the
           Ophthalmology  Strategic Plan.  References to the Operating Committee
           in  the  remainder  of  the   Agreement   shall  also  apply  to  the
           Ophthalmology Operating Committee, unless otherwise indicated."

Section 4.09.01 shall be inserted as follows:

          "4.09.01 SnET2 for Ophthalmology.  Notwithstanding  anything herein to
          the contrary,  for Ophthalmology,  unless otherwise  determined by the
          Ophthalmology  Operating  Committee,  PDTI  shall be  responsible  for
          conducting  all necessary  Preclinical  Tests and Phase I and Phase II
          Clinical Tests for SnET2 to be used in any  Ophthalmology  indications
          within  the  Fields.  The  Out-of-Pocket   Expenses   associated  with
          Preclinical Tests, Phase I and Phase II Clinical Tests being conducted
          by  PDT on the  Ophthalmology  Effective  Date,  or  conducted  by PDT
          thereafter,  shall be  refunded  by  Pharmacia,  provided  that  these
          studies  have  been  conducted  in  agreement  with the  Ophthalmology
          Operating Committee. Pharmacia shall be responsible for conducting and
          shall bear all costs associated with Phase III Clinical Tests of SnET2
          to be  used  in all  Ophthalmology  indications,  as  well  as for all
          post-NDA approval studies which may be necessary;  provided,  however,
          that the Ophthalmology Operating Committee has the right to determine,
          in its reasonable  judgment,  whether to proceed to Phase III Clinical
          Tests  as to  any  Ophthalmology  indication.  PDTI  shall  supply  to
          Pharmacia  SnET2 and Light  Devices to enable  Pharmacia  to carry out
          Phase III  Clinical  Tests  required to support an NDA for SnET2.  The
          actual costs of SnET2 and Light  Devices for all Clinical  Test phases
          shall be shared equally by the parties hereto."

Article XVI "Ophthalmology Negotiation" shall be deleted.


*****Confidential Treatment Requested




Schedule 1.17 shall be deleted and replaced by:

           "SCHEDULE 1.17  Major Indications.
           *****

 Schedule 1.18 shall be deleted and replaced by:

           "SCHEDULE 1.18  Minor Indications.
           *****

Schedule 1.24 shall be inserted as follows:

           "SCHEDULE 1.24  Other Indications.
           *****


The parties shall revise the SnET2 Device Supply and Product Supply  Agreements,
dated July 1st, 1995, to reflect the field of Ophthalmology as appropriate.


           IN WITNESS  WHEREOF,  the parties hereto have caused this Development
and License  Agreement to be executed in duplicate by their respective  officers
duly authorized as of the date first above written.


PDT, INC.
By

Name:

Title:


PHARMACIA S.p.A.

By

Name:

Title:


PHARMACIA & UPJOHN AB

By:

Name:

Title:
















*****Confidential Treatment Requested