EXHIBIT 4.3

                                Agreement Between
                       Palomar Medical Technologies, Inc.
                          and Nexar Technologies, Inc.


         This  Agreement  dated as of the 19th day of  December,  1996 is by and
between Palomar Medical  Technologies,  Inc. ("Palomar") and Nexar Technologies,
Inc. ("Nexar") a wholly owned subsidiary of Palomar.

         Palomar has provided all of Nexar's funds for operations to date in the
form of  non-interest  bearing  loans.  The total  amount of funds  provided  by
Palomar through  September 30, 1996 has been $19,568,449 (the  "Indebtedness") .
The purpose of this Agreement, among other things, is to set forth the terms and
conditions  for  repayment  or   contribution   to  capital  of  Nexar  for  the
Indebtedness. Accordingly, the parties hereby agree as follows:

1.       General  Terms.  Upon the  closing of an initial  public  offering  (an
         "IPO") of the common  stock of Nexar,  $5,000,000  of the  Indebtedness
         will be repaid to Palomar,  $4,568,449  will be  converted  into 45,684
         shares of Nexar's Convertible  Preferred Stock, and $10,000,000 will be
         converted  into  1,900,000  shares of Nexar's  common  stock,  of which
         700,000 will be issued  without  restriction.  The balance of 1,200,000
         shares  (the  "Contingent   Shares")  shall  be  subject  to  mandatory
         repurchase,  in whole or in part,  by Nexar at $0.01  per  share at any
         time after the 48 month  anniversary  of the IPO unless  released  from
         escrow under Section 2, below.

2.       Escrow of Contingent  Shares.  The Contingent Shares shall be placed in
         escrow, subject to release to Palomar in installments of 400,000 shares
         each (upon  achievement of any 3 of the 4 milestones  specified  below;
         none, some, or all of which may occur) as follows:

                  (a) if Nexar achieves  $7,000,000 in net income after taxes or
                  $100  million  in total  revenues  for the  fiscal  year ended
                  December 31, 1997;

                  (b) if Nexar achieves $14,000,000 in net income after taxes or
                  $200  million  in total  revenues  for the  fiscal  year ended
                  December 31, 1998;

                  (c) if Nexar achieves $21,000,000 in net income after taxes or
                  $300  million  in total  revenues  for the  fiscal  year ended
                  December 31, 1999; and

                  (d) if Nexar achieves $28,000,000 in net income after taxes or
                  $400  million  in total  revenues  for the  fiscal  year ended
                  December 31, 2000.

                  Alternatively,  all of the Contingent  Shares will be released
         to Palomar immediately upon the happening of any one of the following:







                  (y) if the average per share market value closing bid price of
                  Nexar's  common  stock  is (i) 175% of the IPO  price  for ten
                  consecutive  trading  days at any  time  prior to the 12 month
                  anniversary  of the IPO, or (ii) 225% of the IPO price for ten
                  consecutive  trading  days at any  time  prior to the 24 month
                  anniversary of the IPO, or (iii) 275% of the IPO price for ten
                  consecutive  trading  days at any  time  prior to the 36 month
                  anniversary  of the IPO, or (iv) 325% of the IPO price for ten
                  consecutive  trading  days at any  time  prior to the 48 month
                  anniversary of the IPO; or

                  (z) if Nexar  achieves  $70,000,000  in cumulative  net income
                  after taxes for the four fiscal years ended December 31, 2000.

If any or all of the alternative conditions for release of the Contingent Shares
has not occurred by the 48 month  anniversary  of the IPO, any of the Contingent
Shares remaining subject to escrow at such time shall be repurchased by Nexar as
described above.

3.       Accelerated Vesting for Performance Options. Performance stock options,
         issued,  or to be  issued,  by Nexar to key  employees  covering  up to
         800,000  shares of Nexar's  common stock will vest in  accordance  with
         their terms or, if earlier,  upon the achievement of the milestones set
         forth in Section 2 above, as follows:

                  (a)  pro  rata  among  the   holders   thereof  in   one-third
                  installments  based on achievement of the milestones set forth
                  in clauses (a) through (d) in Section 2 above, or

                  (b)  all  such  options  shall  vest   immediately   upon  the
                  occurrence of any of the  alternative  conditions set forth in
                  Section 2 above prior to the 48 month anniversary of the IPO.

         This  Agreement  amends,  restates  and  supersedes  in its entirety an
agreement  between the parties  hereto with respect to the subject matter hereof
dated October 1, 1996.

                   [Signatures appear on the following page.]

 

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         Executed as a sealed instrument as of the date first above written.


                                      PALOMAR MEDICAL TECHNOLOGIES, INC.



                                      By:    /s/
                                             ----------------------------------
                                             Steven Georgiev
                                             Chairman and CEO


                                      NEXAR TECHNOLOGIES, INC.



                                      By:  /s/
                                             ----------------------------------
                                             Albert J. Agbay
                                             President





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