STOCK EXCHANGE AGREEMENT

      THIS STOCK EXCHANGE AGREEMENT (this "Agreement") is entered into and is
effective for all purposes as of the 10th day of February, 1997, by and between
TLC The Laser Center, Inc., a corporation organized under the laws of Ontario
("TLC") and Eric J. Hatch ("Hatch").

                                    RECITALS

      WHEREAS, Hatch is an officer and employee of 20/20 Laser Centers, Inc., a
Maryland corporation ("20/20") as well as a holder of certain incentive stock
options to purchase stock in 20/20, both vested and unvested (the "Options"),
pursuant to that certain Stock Option Agreement (the "Stock Option Agreement")
between 20/20 and Hatch dated as of August 31, 1995, as amended by First
Amendment to Stock Option Agreement (the "First Amendment") dated as of
September 1, 1996 and by Second Amendment to Stock Option Agreement (the "Second
Amendment") to be executed concurrently herewith. The Stock Option Agreement as
amended by the First Amendment and Second Amendment shall be referred to herein
as the "Option Agreement".

      WHEREAS, 20/20 and TLC have entered into a Share for Share Exchange
Agreement dated as of December 15, 1996 (the "TLC Exchange Agreement") pursuant
to which TLC is offering to purchase all of the outstanding shares of 20/20 from
its existing shareholders.

      WHEREAS, Hatch received his Options in consideration of personal services
provided to 20/20 as an officer and employee of 20/20.

      WHEREAS, 20/20 and TLC requested that Hatch waive his right to vest
certain options that were granted to his under the Stock Option Agreement, and,
pursuant to the Second Amendment to the Stock Option Agreement, Hatch has agreed
to do so in consideration of TLC entering into this agreement concerning the
exchange of shares at the time Hatch exercises his outstanding options to
purchase shares of 20/20, and TLC is willing to do so on the terms and
conditions set forth below.


                                      -1-


      NOW THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties, intending to be
legally bound, agree to the following terms:

      1. Ratification of Option. The parties hereto ratify and confirm the
Option Agreement, as amended by the First Amendment and Second Amendment and
acknowledge that it is in full force and effect.

      2. Share Exchange. In the event Hatch exercises his options to purchase
20/20 stock pursuant to the Option Agreement on or before March 1, 1999, then
immediately upon the exercise of such option, TLC agrees to issue TLC stock in
exchange for the 20/20 stock purchased by Hatch, at an exchange ratio of .37517
shares of TLC stock for each share of 20/20 stock and Hatch agrees to accept
such exchange of TLC stock, subject to the provisions of paragraphs 3 and 7
below. In the event any Options are not exercised on or before March 1, 1999,
then the obligations of TLC and Hatch under this paragraph 2 shall be null and
void with respect to such Options. The parties are entering into this Agreement
in connection with a transaction described in Section 424(a) of the Internal
Revenue Code in order to retain the status of the Options as qualified incentive
stock options.

      3. Adjustment of Option Shares and Change in Capital Structure.

            a. This Agreement shall not affect in any way the right or power of
      TLC or its stockholders to make or authorize any or all adjustments,
      recapitalizations, reorganizations or other changes in TLC's capital
      structure or its business, or any merger or consolidation of TLC, or any
      issuance of bonds, debentures, preferred or prior preference stock ahead
      of or affecting the common stock or the rights thereof, or the dissolution
      or liquidation of TLC, or any sale or transfer of all or any part of its
      assets or business, or any other corporate act or proceeding, whether of a
      similar character or otherwise.

            b. If TLC shall effect a subdivision or consolidation of shares or
      other capital readjustment, the payment of a stock dividend, or other
      increase or reduction of the number of shares of the common stock
      outstanding, without receiving compensation therefor in money, services or
      property, then (1) the number, class, and per share price of shares of
      common stock to be exchanged hereunder shall be appropriately adjusted in
      such a manner as to entitle Hatch to receive upon exercise of an Option,
      for the same aggregate cash consideration, the same total number and class
      of shares as he would have received had Hatch exercised his Option in full
      immediately prior to the event requiring the adjustment; and (2) the
      number and class of shares then reserved for issuance hereunder as a
      result of Options outstanding shall be adjusted by substituting for the
      total 


                                      -2-


      number and class of shares of common stock then reserved that number and
      class of shares of common stock that would have been received by the owner
      of an equal number of outstanding shares of each class of common stock as
      the result of the event requiring the adjustment.

            c. After a merger of one or more corporations with TLC or after a
      consolidation of TLC and one or more corporations, Hatch shall, at no
      additional cost, be entitled upon exercise of an Option to receive
      pursuant to this Agreement in lieu of the number and class of shares as to
      which he would be entitled to exchange pursuant to paragraph 2 hereof, the
      number and class of shares of stock or other securities to which Hatch
      would have been entitled pursuant to the terms of the agreement of merger
      or consolidation if, immediately prior to such merger or consolidation,
      Hatch had been the holder of record of the number and class of shares of
      common stock equal to the number and class of shares as to which he would
      be entitled under paragraph 2 hereof.

            d. Except as previously expressly provided, neither the issuance by
      TLC of shares of stock of any class, or securities convertible into shares
      of stock of any class, for cash or property, or for labor or services
      either upon direct sale or upon the exercise of rights or warrants to
      subscribe therefor, or upon conversion of shares or obligations of TLC
      convertible into such shares or other securities, nor the increase or
      decrease of the number of authorized shares of stock, nor the addition or
      deletion of classes of stock, shall affect, and no adjustment by reason
      thereof shall be made with respect to, the number, class or price of
      shares of common stock then subject to this Agreement.

            e. Adjustment under the preceding provisions of this section will be
      made by the Board of Directors of TLC in good faith, whose determination
      as to what adjustments will be made and the extent thereof will be final,
      binding, and conclusive.

      4. Authorization and Reservation of Shares. During the term of this
Agreement, TLC will at all times have authorized and reserved a sufficient
number of shares of its common stock to provide for the rights to exchange as
provided for herein. TLC represents and warrants that (i) all stock issued to
Hatch in exchange for 20/20 stock shall be validly issued, fully paid and
non-assessable, and (ii) such stock shall be free of restrictions on
transferability imposed by 20/20 or TLC other than the provisions of paragraph 7
hereof and the terms and conditions of the Holdback Agreement (defined in
paragraph 7), provided however, that, subject to the provisions of paragraph 6
hereof and the terms and conditions of the Registration Rights Agreement
(defined in paragraph 6), such stock may be subject to restrictions on
transferability imposed by applicable law.


                                      -3-


      5. No Fractional Share or Scrip. No fractional shares or scrip
representing fractional shares shall be issued hereunder. Any fractional shares
shall be rounded to the nearest whole share such that fractions of .50 and
greater shall be rounded up to the next whole share and fractions of less than
 .50 shall be rounded down. 

      6. Registration Rights Agreement. TLC acknowledges and agrees that the TLC
shares issuable to Hatch pursuant to this Agreement (a) shall be included as
part of the shares that are subject to that certain Registration Rights
Agreement dated concurrently herewith between TLC and the shareholders of 20/20
(the "Registration Rights Agreement"), and (b) shall be included in any
obligation of TLC to register shares of former 20/20 shareholders on the Toronto
Stock Exchange pursuant to the TLC Exchange Agreement.

      7. Holdback Agreement. The parties acknowledge and agree that the TLC
shares to which Hatch may be entitled pursuant to this Agreement are subject to
the terms and conditions of that certain Holdback Agreement dated concurrently
herewith between TLC and the shareholders of 20/20 (the "Holdback Agreement")
and that any TLC shares issued to Hatch pursuant to this Agreement shall be
subject to the terms and conditions of the Holdback Agreement. In the event TLC
is entitled to indemnification under the Holdback Agreement prior to a time that
Hatch has exercised all of his Options, then the exchange ratio set forth in
paragraph 2 hereof shall be modified so that the number of TLC shares that Hatch
receives pursuant to this Agreement upon exercise of an Option shall be adjusted
so that upon the exercise of an Option, Hatch receives the number and class of
shares of stock or other securities to which Hatch would have been entitled
pursuant to the terms of the Holdback Agreement if, immediately prior to the
exercise of such Options, Hatch had been the holder of record of the number and
class of shares of common stock equal to the number and class of shares as to
which he would be entitled under paragraph 2 hereof. Hatch acknowledges that she
is an "Insider" for purposes of the Holdback Agreement. TLC agrees that in the
event Hatch's employment agreement with TLC is terminated for any reason prior
to the time that all of his stock is released from the Holdback Agreement, then
TLC shall release at least a sufficient amount of Hatch's stock from the
Holdback Agreement so that she can use the stock to pay the tax liability on any
deferred compensation that Hatch receives pursuant to Hatch's deferred
compensation agreement with 20/20 as a result of such termination and on capital
gain from the sale of the stock.

      8. Miscellaneous. This Agreement shall be governed by and construed under
the laws of the State of Maryland. This Agreement shall be binding upon and
benefit the parties hereto and their respective successors, heirs, personal
representatives and assigns. The titles of the sections and subsections of this
Agreement are for convenience only and are not to be considered in construing
this Agreement. This Agreement does not entitle Hatch to any voting rights or
other rights as a shareholder of TLC with respect to any shares that are the


                                      -4-


subject matter hereof prior to the exercise of the Options as provided for
herein. All notices required or permitted to be given under this Agreement shall
be in writing and shall be delivered in person, by telecopy, by express courier
or by certified mail, return receipt requested, postage prepaid.

            IN WITNESS WHEREOF, the parties have signed this Agreement as of the
date first set forth above.

                                          TLC:

                                          TLC The Laser Center, Inc.

                                          By: /s/ Ronald J. Kelly
                                              ----------------------------------
                                              Ronald Kelly, Vice President


                                          HATCH:


                                              /s/ Eric J. Hatch
                                              ----------------------------------
                                              Eric J. Hatch

Acknowledged and Agreed To:

20/20 Laser Centers, Inc.


By: /s/ Gary F. Jonas
    -----------------------


                                      -5-