TORYS LLP                      23 Park Avenue           Andrew Beck
- ------------------             New York, New York       Direct Tel. 212.880.6010
NEW YORK   TORONTO             10017.3142               abeck@torys.com

                               TEL 212.880.6000
                               FAX 212.682.0200

                               www.torys.com



                                                        November 1, 2004


Securities and Exchange Commission
450 Fifth Street, NW
Washington, DC 20549
U.S.A.


Attention:  Ms. Peggy Fisher

            RE:  OCCULOGIX, INC. REGISTRATION STATEMENT ON FORM S-1, AMENDMENT
                 NO. 1 COMMISSION FILE NO. 333-118204 FILED ON OCTOBER 7, 2004


     On behalf of our client, OccuLogix, Inc. (the "Company"), we transmit for
your review Amendment No. 2 to the Registration Statement on Form S-1 (the
"Second Amended Form S-1") of the Company, which amends Amendment No. 1 to the
Registration Statement on Form S-1 (File No. 333-118204) (the "Amended Form
S-1") of the Company filed on October 7, 2004.

     The Second Amended Form S-1 reflects changes made in response to the
comment letter received from the Staff of the Securities and Exchange Commission
(the "Commission"), dated October 20, 2004 (the "Comment Letter"). The page
numbers referenced in the responses included in this letter refer to the
enclosed marked EDGAR submission of the Second Amended Form S-1. This letter
provides responses and supplemental information in response to the comments of
the Staff and is keyed to the headings and comment numbers contained in the
Comment Letter.

GENERAL

     1.   WE NOTE YOUR RESPONSE TO PRIOR COMMENT 7. PLEASE DISCUSS IN AN
          APPROPRIATE LOCATION IN THE FILING THE FACT THAT CERTAIN NEWSPAPER
          REPORTS CONTAIN ERRONEOUS INFORMATION REGARDING THE TIMING OF THE
          INTRODUCTION OF YOUR TREATMENT AND THAT POTENTIAL INVESTORS SHOULD NOT
          RELY ON THE REPORTED PROJECTIONS.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 10 to add a risk factor addressing the issue.




                                     - 2 -

PROSPECTUS SUMMARY - PAGE 1

     2.   WE NOTE THAT THE CLINICAL TRIAL DATA IS FROM LATE 2001. SINCE THE
          TRIAL HAS CONTINUED FOR ALMOST THREE YEARS, UPDATE THIS PARAGRAPH TO
          CLARIFY WHETHER SUBSEQUENT RESULTS ARE CONSISTENT WITH THOSE DESCRIBED
          HERE. WE NOTE YOUR PLAN TO COMPLETE ENROLLMENT AND SUBMIT ADDITIONAL
          DATA TO THE FDA BEFORE THE END OF 2004. WHILE WE UNDERSTAND THAT YOU
          MAY NOT HAVE ALL THE INFORMATION COMPLETED YET, YOU SHOULD BE ABLE TO
          PROVIDE SOME UPDATED DISCLOSURE ON THE RESULTS YOU HAVE SEEN TO DATE
          AND EXPLAIN HOW THEY COMPARE TO THE 2001 CLINICAL TRIAL DATA.

          The Company advises the Staff that the MIRA-1 study is a double
          blinded, placebo-controlled study and therefore the Company does not
          and is not permitted to know the updated results until the clinical
          portion of MIRA-1 is complete. In response to the Staff's comment, the
          Company has revised the disclosure on pages 1 and 45 to explain why
          the Company cannot provide an update of the MIRA-1 clinical results.

     3.   FOR THE PATIENTS WHO IMPROVED TO MEET THE 20/40 STANDARD, QUANTIFY HOW
          MUCH "WORSE THAN LEGAL DRIVING VISION" THEY WERE AT THE BEGINNING OF
          THE CLINICAL TRIAL.

          In response to the Staff's comment, the Company has revised the
          disclosure on pages 1 and 45.

     4.   WE NOTE THE ADDITIONAL DISCLOSURE REGARDING THE AGREEMENT WITH RHEO
          THERAPEUTICS, INC. EXPAND THE BUSINESS SECTION TO DISCUSS THE MATERIAL
          TERMS OF THE AGREEMENTS, AND FILE IT AS AN EXHIBIT. CONFIRM THAT THERE
          IS NO AFFILIATION BETWEEN THIS ENTITY AND THE REGISTRANT AND/OR ANY OF
          ITS AFFILIATES.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 61. The Company supplementally advises the Staff
          that there is no affiliation between RheoTherapeutics, Inc. and the
          Company or any of its affiliates.

     5.   WE REISSUE COMMENT 13 SINCE YOUR RESPONSE WAS NOT COMPLETE. DESCRIBE
          THE EXTENT OF THE AFFILIATION OF THE REGISTRANT WITH TLC VISION
          CORPORATION, INCLUDING THE COMMON DIRECTORS OF THE TWO COMPANIES, THE
          EQUITY OWNERSHIP OF YOUR CEO IN TLC VISION, AND OTHERS.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 2 and 46.



                                     - 3 -


     6.   WE NOTE YOUR RESPONSE TO PRIOR COMMENT 17. PLEASE STATE HERE THAT YOUR
          MARKETING ACTIVITIES HAVE BEEN LIMITED TO IDENTIFYING WHOM YOU WILL
          CHOOSE TO MARKET UPON OBTAINING FDA APPROVAL AND THAT YOU ARE NOT IN
          NEGOTIATION WITH ANY U.S. HEALTH CARE SERVICE PROVIDERS TO SUPPLY YOUR
          PRODUCT OR TO LICENSE YOUR TREATMENT.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 5.

     7.   WE REISSUE COMMENT 16. THE BENEFITS YOU LIST ON PAGE 3 AND ELSEWHERE
          SHOULD BE BALANCED WITH THE DISADVANTAGES. FOR EXAMPLE, WE NOTE THAT
          INDIVIDUALS HAD TO MEET CERTAIN SPECIFIC CRITERIA IN ORDER TO
          PARTICIPATE IN CLINICAL TRIALS. THE FIRST BULLET IMPLIES THAT EVERYONE
          WITH DRY AMD IS A POTENTIAL PATIENT. THE SECOND BULLET SHOULD MAKE
          CLEAR THAT YOU DID NOT FOLLOW PATIENTS IN THE CLINICAL TRIAL BEYOND
          ONE YEAR. THESE ARE JUST A FEW EXAMPLES - APPLY THE COMMENT TO EACH
          BULLET.

          In response to the Staff's comment, the Company has revised the
          disclosure contained on pages 3, 4, 50 and 51 to balance the benefits
          discussed with applicable disadvantages. The Company supplementally
          advises in respect to the Staff's comment on the first bullet in the
          "Our Solution" section that the criteria for the MIRA 1 study are not
          intended to be indicative of who may be treated with RHEO Therapy in
          the Dry AMD population. These criteria were chosen in order to ensure
          that the study would, to the maximum extent possible, illustrate the
          effect the treatment has on the patients, controlled to remove
          positive or negative external forces such as other conditions the
          patient has or drugs that the patient was taking that were not common
          among all patients in the trial.

     8.   WE NOTE YOUR RESPONSE TO COMMENT 21. EXPAND TO STATE THE NUMBER OF
          PATIENTS TREATED IN CANADA TO DATE.

          In response to the Staff's comment, the Company has revised the
          disclosure on pages 2 and 46.

     9.   WE NOTE YOUR RESPONSE TO COMMENT 23. ALSO DISCLOSE THEIR EQUITY
          INTERESTS IN TLC VISION.

          In response to the Staff's comments, the Company has revised the
          disclosure on pages 2 and 46.




                                     - 4 -

THE OFFERING - PAGE 6

     10.  IN AN APPROPRIATE LOCATION IN THE FILING, EXPLAIN IN REASONABLE DETAIL
          HOW YOU DETERMINED THE NUMBER OF SHARES TO ISSUE TO TLC VISION FOR ITS
          INTEREST IN OCCULOGIX, L.P., PARTICULARLY IN VIEW OF THE RELATED PARTY
          RELATIONSHIP. IF YOU OBTAINED AN INDEPENDENT APPRAISAL, DESCRIBE IT
          AND PROVIDE IT SUPPLEMENTALLY.

          In response to the Staff's comment, the Company supplementally advises
          that it believes that page 66 contains a reasonably detailed
          description of how the number of shares to be issued to TLC Vision was
          calculated. Furthermore, as part of the closing of this offering, the
          Company is in the process of obtaining the approval of a majority in
          interest of its stockholders (other than TLC Vision) to complete the
          Reorganization (including this issuance of shares to TLC Vision). The
          Company has revised the disclosure on page 7 to briefly refer to the
          basis for the calculation and has directed the reader to the more
          detailed discussion contained in the "Reorganization" section
          beginning on page 66. The Company has also supplementally provided a
          report prepared by an independent valuator commenting on the portion
          of the enterprise value of the Company attributable to OccuLogix, Inc.
          and OccuLogix, L.P. as Appendix A to this letter. The Company requests
          that the Staff return the copy of the valuator's report once you are
          finished with it.


RISK FACTORS - PAGE 9

     11.  WE NOTE YOUR RESPONSE TO COMMENT 25 AND REISSUE THE COMMENT. IN THE
          BEGINNING OF THIS SECTION, PLEASE ADD A RISK FACTOR DISCLOSING THAT
          YOUR AUDITOR RAISED SUBSTANTIAL DOUBT ABOUT YOUR ABILITY TO CONTINUE
          AS A GOING CONCERN. ALSO, PROVIDE YOUR MOST RECENT WORKING CAPITAL AND
          SHAREHOLDER EQUITY FIGURES.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 10.

WE DO NOT KNOW WHETHER WE WILL BE ABLE TO INCREASE OUR REVENUES - PAGE 9

     12.  EXPAND THE CAPTION TO MAKE CLEAR THAT ALL REVENUES SINCE JULY 2002
          HAVE BEEN DERIVED FROM SALES TO A RELATED PARTY.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 11.




                                     - 5 -


OUR SUPPLIERS MAY NOT HAVE SUFFICIENT MANUFACTURING CAPACITY - PAGE 14

     13.  EXPAND THIS RISK FACTOR TO DISCLOSE THAT YOU PLAN TO USE $12.5 MILLION
          TO $13.5 MILLION OF THE NET PROCEEDS TO STOCKPILE INVENTORY OF
          COMPONENTS FROM ASAHI, EVEN THOUGH YOU DO NOT INTEND TO MARKET THE
          PRODUCT COMMERCIALLY UNTIL LATE 2006, AT THE EARLIEST. ALSO DISCUSS
          THE RELATED EXCESS INVENTORY RISKS DESCRIBED ON PAGE 47. GIVEN THE
          ADVANCE NOTICE YOU HAVE, DISCUSS IN THE BUSINESS SECTION WHY YOU ARE
          NOT SEEKING AN ALTERNATIVE SUPPLIER WHEN ASAHI MEDICAL CAN NO LONGER
          SUPPLY THE FILTERS YOU NEED.

          In response to the Staff's comments, the Company has revised the
          disclosure on pages 16 and 59.

CONFLICTS OF INTEREST - PAGE 17

     14.  DISCLOSE THE EXTENT TO WHICH THE NAMED INDIVIDUALS HAVE EQUITY OR
          OTHER FINANCIAL INTERESTS IN TLC VISION.

          In response to the Staff's comments, the Company has revised the
          disclosure on pages 18 and 19.

     15.  ADD A SEPARATE RISK FACTOR TO DISCLOSE THAT THE REGISTRANT HAS ENTERED
          INTO A NUMBER OF RELATED PARTY TRANSACTIONS WITH SUPPLIERS, CREDITORS,
          SHAREHOLDERS, AND OTHER PARTIES, AND BRIEFLY DESCRIBE THEM.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 21.

     16.  ADD A SEPARATE RISK FACTOR TO DISCLOSE THE FINANCIAL IMPACT ON FUTURE
          OPERATIONS FROM THE STOCK OPTIONS YOU ISSUED IN LATE 2003, AND
          DISCLOSE THE NUMBER ISSUED TO INSIDERS AND THE OPTION EXERCISE PRICE.

          In response to the Staff's comments, the Company has revised the
          disclosure on pages 21 and 22.

     17.  ADD A SEPARATE RISK FACTOR TO DISCUSS THE FACT THAT SEVERAL OF YOUR
          DIRECTORS AND MANAGEMENT TEAM MEMBERS HAVE BEEN WITH THE REGISTRANT
          FOR ONLY A SHORT TIME.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 22.


                                     - 6 -


UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL DATA - PAGE 27

     18.  REVISE THE INTRODUCTORY PARAGRAPHS TO SPECIFICALLY TELL INVESTORS THAT
          THE INFORMATION PROVIDED HERE IS A SUMMARY AND TO REFER THEM TO THE
          DETAILED INFORMATION ON PAGES F-51 THROUGH F-59.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 30.

     19.  THE PRO FORMA FINANCIAL INFORMATION TABULAR PRESENTATION IS NOT
          COMPLETE. PLEASE REVISE TO COMPLETE THE INFORMATION. THIS COMMENT
          APPLIES ALSO TO THE DETAILED PRO FORMA INFORMATION FOUND ON PAGES F-51
          THROUGH F-53.

          The Company notes the Staff's comments, it will complete the pro forma
          financial information once the necessary pricing information is
          available.

     20.  REVISE YOUR PRO FORMA INFORMATION TO DISCLOSE PRO FORMA LOSS PER SHARE
          DATA AND THE NUMBER OF BASIC AND DILUTED SHARES ASSUMED OUTSTANDING.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 31.

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
OPERATIONS - PAGE 29

     RESULTS OF OPERATIONS - PAGE 31

     21.  WE NOTE THE REVISED DISCLOSURE ON PAGES 31 AND 32 IN RESPONSE TO PRIOR
          COMMENT 43. PLEASE CONSIDER MOVING YOUR DISCUSSION OF THE SIGNIFICANT
          CHANGES TO COMPONENTS OF WORKING CAPITAL TO APPEAR UNDER THE CAPTION
          LIQUIDITY AND CAPITAL RESOURCES TO BETTER EXPLAIN CASH FLOW FROM
          OPERATIONS.

          In response to the Staff's comment, the Company has revised the
          disclosure on pages 35 and 38.

     22.  WE REISSUE PRIOR COMMENT 46. PLEASE BREAK DOWN "GENERAL AND
          ADMINISTRATIVE EXPENSES" IN MORE DETAILED ITEMS AND QUANTIFY THEM IN
          THE SIX-MONTH AND YEAR-END COMPARISONS.

          In response to the Staff's comment, the Company has revised the
          disclosure on pages 36 and 37.

     23.  AT THE TOP OF PAGE 31, STATE HOW MANY EMPLOYEES AND HOW MANY EMPLOYEES
          AND DIRECTORS RECEIVED STOCK OPTIONS.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 34.




                                     - 7 -


     24.  PLEASE CLARIFY IF THE TOTAL COST OF STOCK OPTIONS GRANTED TO EMPLOYEES
          IN 2003 WAS $3,078,462 OR IF THE AMOUNT EXPENSED OR AMORTIZED DURING
          THE FIRST SIX MONTHS OF 2004 WAS $3,078,462. DISCUSS THE TREND OF THE
          STOCK OPTIONS GRANTS IN THE FUTURE.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 34.

     25.  RESPOND TO COMMENT 47 BY IDENTIFYING THE INDIVIDUALS AND QUANTIFY THE
          NUMBER OF SHARES TO EACH ON PAGE 31.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 34.

     26.  REFER TO PRIOR COMMENT 48. PLEASE DISCUSS THE LEVEL OF CLINICAL AND
          REGULATORY SPENDING IN THE FUTURE.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 35. The Company supplementally advises the Staff
          that it cannot know exactly what its future spending will be until it
          receives responses from the FDA regarding the MIRA-1 and polysulfone
          filter trials.

     LIQUIDITY AND CAPITAL RESOURCES - PAGE 33

     27.  REFER TO PRIOR COMMENT 53. IT IS STILL UNCLEAR IF YOUR PURCHASE ORDER
          PLACED WITH ASAHI MEDICAL IN JULY 2004 WAS MADE AS PART OF THE
          COMMITMENT DESCRIBED IN THE DISTRIBUTION AGREEMENT ENTERED IN JANUARY
          2002. PLEASE CLARIFY.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 39.

     RECENT DEVELOPMENTS - PAGE 38

     28.  REVISE THE RECENT DEVELOPMENTS SECTION TO INCLUDE A DISCLOSURE OF HOW
          THE EVENTS CONTEMPLATED IN THE REORGANIZATION WOULD HAVE IMPACTED YOUR
          RESULTS IN FISCAL 2003 AND THE 2004 INTERIM PERIOD, HAD THEY OCCURRED
          AT THE BEGINNING OF THESE PERIODS. AS MUCH AS POSSIBLE, HIGHLIGHT THE
          MATERIAL DIFFERENCES BETWEEN YOUR HISTORICAL RESULTS AND THE PRO FORMA
          SUMMARY PROVIDED ON PAGE 28.

          In response to the Staff's comment, the Company has revised the
          disclosure on pages 43 and 44.





                                     - 8 -

BUSINESS - PAGE 40

     OVERVIEW- PAGE 40

     29.  WE NOTE YOU RECEIVED HEALTH PROTECTION BRANCH APPROVAL IN CANADA IN
          2003 AND BEGAN LIMITED COMMERCIALIZATION OF YOUR RHEO SYSTEM THAT
          YEAR. PLEASE DESCRIBE WHAT THIS APPROVAL ALLOWS YOU TO DO IN CANADA.
          DISCLOSE WHETHER YOU NEED FURTHER GOVERNMENT APPROVAL OR CLEARANCE IN
          ORDER TO FULLY COMMERCIALIZE YOUR PRODUCT AND THERAPY.

          In response to the Staff's comment, the Company has revised its
          disclosure on page 45.

     30.  PLEASE DEFINE CE MARK APPROVAL.

          In response to the Staff's comment, the Company has revised its
          disclosure on page 46.

     OUR HISTORY AND MAJOR RELATIONSHIPS - PAGE 41

     31.  REFER TO PRIOR COMMENT 55. WE NOTE THAT YOU HAVE SUBSIDIARIES OTHER
          THAN OCCULOGIX, LP, SUCH AS OCCULOGIX HOLDING, INC., OCCULOGIX
          MANAGEMENT, INC., AND OCCULOGIX LLC. PLEASE BRIEFLY DESCRIBE THEIR
          BUSINESS AND YOUR AFFILIATION TO THEM.

          In response to the Staff's comment, the Company has revised the
          disclosure in the "Reorganization" section on pages 67 and 68. In the
          revised language, the Company has explained the relationship of its
          various subsidiaries.

     32.  IN VIEW OF THE COMPLEXITY OF YOUR CORPORATE STRUCTURE OVER THE YEARS,
          INCLUDE CHARTS TO EXPLAIN THE RELATIONSHIPS AND OWNERSHIP INTERESTS OF
          ALL THE RELATED PARTIES PRE- AND POST REORGANIZATION AND AFTER THE
          IPO. EXPLAIN THE BUSINESS PURPOSES FOR STRUCTURING YOUR ORGANIZATION
          THE WAY YOU HAVE IN THE PAST.

          In response to the Staff's comment, the Company has revised the
          disclosure in the "Reorganization" section to include charts and
          descriptions of the corporate structure pre- and post-Reorganization
          and post-IPO. The Company has also revised the disclosure in the
          "Reorganization" section on pages 67 and 68.




                                     - 9 -


     33.  ON PAGES 2 AND 4, YOU STATE THAT YOU HAVE EXCLUSIVE RIGHTS TO
          COMMERCIALIZE THE RHEO SYSTEM FOR OPHTHALMIC USES OR FOR USE IN
          TREATING AMD IN NORTH AMERICA AND THE CARIBBEAN. ON PAGE 41, HOWEVER,
          YOU STATE THAT YOU LICENSED YOUR RIGHTS FOR RHEO SYSTEM TO RHEOGENX
          BIOSCIENCES CORPORATION FOR NON-OPHTHALMIC USES. PLEASE RECONCILE HOW
          YOU COULD LICENSE RIGHTS FOR NON-OPHTHALMIC USES WHILE YOU ONLY
          POSSESSED RIGHTS FOR OPHTHALMIC USES. DESCRIBE THE TERMS OF THE
          LICENSING AGREEMENT AND NAME STOCKHOLDER WHO CREATED RHEOGENX
          BIOSCIENCES.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 46. The Company supplementally advises that the
          reason for the reference to non-ophthalmic rights in this section is
          because the license with Rheogenix covers more than just the rights
          granted under the Diamed and Asahi Medical distribution agreements.
          The license also covers related intellectual property. With respect to
          this intellectual property, the Company owns or has broader licenses
          to the rights (e.g., the trademarks, the owned patent (6,551,266), the
          licensed patent (6,245,038) or any know how) than just those covered
          by the Diamed and Asahi Medical distribution agreements, and therefore
          can sublicense this to third parties for uses outside the ophthalmic
          field. The Company also notes that the license covers after acquired
          rights and therefore would cover any non-ophthalmic rights granted by
          Diamed or Asahi Medical to the Company in the future.

     34.  PLEASE DISCLOSE THAT APHERESIS TECHNOLOGIES, INC. WAS SPUN OFF FROM
          YOU IN 2002 AND NAME THE PERSONS CONTROLLING THE COMPANY.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 47.

     CLINICAL STUDIES - PAGE 49

     35.  WE NOTE YOUR RESPONSE TO PRIOR COMMENT 29. PLEASE DESCRIBE THE MAJOR
          TERMS OF THE AGREEMENT WITH PROMEDICA INTERNATIONAL, INCLUDING THE
          COMPENSATION YOU AGREED TO PAY, AND FILE IT AS AN EXHIBIT.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 55 and has filed its agreement with Promedica
          International as an exhibit.

REORGANIZATION - PAGE 59

     36.  IN THE SECOND PARAGRAPH, CLARIFY WHETHER ANY SUBSIDIARY INCORPORATED
          TO CARRY ON THE CANADIAN BUSINESS WILL BE WHOLLY OWNED BY THE
          REGISTRANT.

          In response to the Staff's comment, the Company has revised the
          disclosure on pages 67 and 68.




                                     - 10 -

MANAGEMENT - PAGE 60

     OPTION GRANT TO CHAIRMAN - PAGE 65

     37.  STATE THE OPTION EXERCISE PRICE FOR THE OPTIONS AND DISCLOSE WHEN THEY
          BECOME EXERCISABLE.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 74.

CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS - PAGE 70

     38.  PLEASE DESCRIBE THE CONSULTING AGREEMENT WITH MR. HANS STOCK IN THE
          MANNER REQUIRED BY ITEM 404 OF REGULATION S-K. SEE F-19.

          In response to the Staff's comments, the Company has revised the
          disclosure on page 80.

     39.  ALSO DISCUSS NEW APHERESIS TECHNOLOGIES, AND IDENTIFY THE "CERTAIN
          STOCKHOLDERS OF THE COMPANY WHO CONTROL IT" AND THE AMOUNTS PAID TO IT
          FOR THE VARIOUS PURPOSES, AS NOTED ON PAGE F-20.

          In response to the Staff's comments, the Company has revised the
          disclosure on pages 80 and 81.

     40.  WE NOTE THE DISCLOSURE REGARDING A CONSULTANCY AND NON-COMPETITION
          AGREEMENT DESCRIBED ON PAGE F-21. SUPPLEMENTALLY IDENTIFY THE RELATED
          PARTY, AND DISCUSS HERE, OR EXPLAIN WHY YOU BELIEVE NO DISCLOSURE IS
          NECESSARY.

          The consultancy and non-competition agreement dated July 1, 2003 is
          between the Company and the Center for Clinical Research. Although the
          Company referred to the Center for Clinical Research as a related
          party for accounting purposes, the Center for Clinical Research does
          not meet the legal definition of a related party as it is not, and is
          not owned by, a director or executive officer of the Company, a
          greater than 5% shareholder or any member of the immediate family of
          any of the foregoing and therefore disclosure is not required by Item
          404 of Regulation S-K.

     41.  WE NOTE THE DISCLOSURE ON PAGE F-25. SUPPLEMENTALLY ADVISE WHO MAKES
          UP THE ENTITY "CREATED WITH THE SAME INVESTOR GROUP AS THE COMPANY".
          SPECIFICALLY IDENTIFY ANY INDIVIDUALS WHO ARE AFFILIATES OF THIS
          REGISTRANT. IDENTIFY THE EXECUTIVE REFERRED TO IN THE FOOTNOTE, ALSO.
          WE MAY HAVE FURTHER COMMENTS.

          In response to the Staff's comment, the Company has revised the
          disclosure on page 81.



                                     - 11 -


FINANCIAL STATEMENTS OF OCCULOGIX, INC. - PAGE F-2

NOTE 2. SIGNIFICANT ACCOUNTING POLICIES - PAGE F-8

     REVENUE RECOGNITION - PAGE F-8

     42.  WE NOTE YOUR SUPPLEMENTAL RESPONSE TO PRIOR COMMENT 93 AND THE RELATED
          REVISIONS. TO PROVIDE GREATER UNDERSTANDING FOR INVESTORS, PLEASE
          CONSIDER REVISING YOUR DISCLOSURE TO INCLUDE THE MORE SALIENT POINTS
          OF YOUR SUPPLEMENTAL RESPONSE.

          In response to the Staff's comment, the Company has revised the
          disclosure on page F-8.

     43.  WE SEE IN NOTE 4 TO THE OCCULOGIX L.P. FINANCIAL STATEMENTS ON PAGE
          F-49 THAT THE PARTNERSHIP ACQUIRES ALL OF ITS PRODUCTS FROM YOU AT
          COST PURSUANT TO THE SALES AGREEMENT. IF TRUE, PLEASE EXPLAIN WHY YOUR
          COST OF SALES WOULD NOT BE THE SAME AS YOUR REVENUES. REVISE THE
          FILINGS TO CLEARLY DISCLOSE ALL COMPONENTS OF REVENUE.

          The Company supplementally advises the Staff that it has established
          an amount which it believes is a reasonable estimation of its cost of
          the RHEO System. This estimated cost includes the cost of product
          which for the OctoNova pump may be subject to exchange rate
          fluctuations between the euro and the U.S. dollar. Also included in
          the estimated costs of the OctoNova pump is the estimated cost of
          calibration. Additional costs include freight, royalty fees and a 5%
          fee for warehousing and logistics support.

          The variance between the estimated cost of the product which is being
          used as the sale price and the actual cost of the product will be
          impacted primarily by the quantity of product sold to OccuLogix, L.P.

          The estimated cost assumes that sufficient product will be sold to
          OccuLogix, L.P. such that the minimum royalty payments required, under
          agreements with Mr. Hans Stock and Dr. Richard Brunner to license the
          applicable patent for the RHEO System, will not impact the cost.
          However, sales of the RHEO System to the Partnership have not been
          anywhere close to satisfying the annual $100,000 minimum payment
          required under the agreements with Mr. Stock and Dr. Brunner. The
          Company fully expenses the minimum royalty payments when made which is
          the primary reason that the cost of sales are greater than revenues.
          Also impacting the variance between revenues recorded and the actual
          cost of sales will be the differences between actual and estimated
          freight, actual and estimated conversion of U.S. dollar into euros to
          pay for Octo Nova pump purchases and the actual cost of commercial
          licensing in Canada as compared to the estimated cost of the RHEO
          System components to arrive at a sales value.




                                     - 12 -


     44.  REVISE THE STATEMENT OF OPERATIONS TO LABEL ALL REVENUES EARNED FROM
          THE PARTNERSHIP AS RELATED PARTY ON THE FACE OF THE STATEMENT.

          In response to the Staff's comment, the Company has revised the
          disclosure on page F-4.

NOTE 5. INVESTMENT IN PARTNERSHIP - PAGE F-15

     45.  WE NOTE YOUR RESPONSE TO COMMENT 95. PLEASE REVISE THE SECOND
          PARAGRAPH ON PAGE F-15 TO DISCLOSE YOUR REASONS FOR USING THE EQUITY
          METHOD TO ACCOUNT FOR YOUR INTEREST IN THE PARTNERSHIP.

          In response to the Staff's comment, the Company has revised the
          disclosure on page F-15.

     46.  IN LIGHT OF THE FACT THAT THE PARTNERSHIP IS YOUR PRIMARY CUSTOMER AND
          RHEO CLINIC INC. IS THE PARTNERSHIP'S PRIMARY CUSTOMER, TELL US AND
          REVISE THIS NOTE AND THE RELATED PARTY TRANSACTIONS NOTES ON PAGES
          F-18 AND F-49 TO DISCLOSE THE AMOUNT OF RHEO CLINICS REVENUES THAT
          WERE EARNED FROM SALES OF THE RHEO SYSTEMS TO INDEPENDENT THIRD
          PARTIES. DISCLOSE A SIMILAR MEASURE IN YOUR BUSINESS AND MD&A
          DISCUSSIONS.

          In response to the Staff's comment, the Company has revised the
          disclosure on pages 33 and 46.

FINANCIAL STATEMENTS OF OCCULOGIX L.P. - PAGE F-41

     47.  REVISE THE STATEMENT OF OPERATIONS TO SEPARATELY PRESENT AND LABEL ALL
          REVENUES AND THE RELATED COST OF SALES EARNED FROM THE RHEO CLINIC
          INC. AS RELATED PARTY TRANSACTIONS ON THE FACE OF THE STATEMENT.

          In response to the Staff's comments, the Company has revised the
          disclosure on page F-43.

PRO FORMA INFORMATION OF OCCULOGIX, INC. - PAGE F-51

     48.  WE RECOGNIZE YOUR REVISION IN RESPONSE TO PRIOR COMMENT 100. HOWEVER,
          WE RE-ISSUE OUR COMMENT. AS REQUESTED, PLEASE PROVIDE AN INTRODUCTORY
          PARAGRAPH TO THE PRO FORMAS THAT CLEARLY OUTLINES THE INFORMATION YOU
          ARE PRESENTING, INCLUDING A CLEAR DESCRIPTION OF THE TRANSACTIONS AND
          THE DATE AT WHICH YOU ASSUME THE TRANSACTIONS OCCUR FOR EACH OF THE
          PRO FORMA STATEMENTS OF OPERATIONS AND THE PRO FORMA BALANCE SHEET.
          THESE INTRODUCTORY PARAGRAPHS SHOULD APPEAR JUST PRIOR TO THE
          PRESENTATION OF THE ACTUAL PRO FORMA FINANCIAL STATEMENTS.

          In response to the Staff's comment, the Company has revised the
          disclosure on page F-51.




                                     - 13 -


     49.  WE ARE RE-ISSUING PRIOR COMMENT 101. PLEASE COMPLETE THE PRO FORMA
          ADJUSTMENTS.

          The Company notes the Staff's comments, it will complete the pro forma
          adjustments once the necessary pricing information is available.

PART II

RECENT SALES OF UNREGISTERED SECURITIES - PART II-1

     50.  WE HAVE REVIEWED THE SCHEDULE YOU PROVIDED IN RESPONSE TO PRIOR
          COMMENT 102, BUT THE INFORMATION IS UNCLEAR, ESPECIALLY FOR THE AWARDS
          GRANTED IN 2004.

          (A)  PLEASE REVISE TO CLARIFY IN EACH INSTANCE WHETHER YOU GRANTED
               OPTIONS OR WARRANTS, OR ISSUED COMMON STOCK OR PREFERRED STOCK
               FOR CASH, UPON THE EXERCISE OF WARRANTS OR OPTIONS, AS
               CONSIDERATION FOR SERVICES OR AS PART OF A DEBT OR PREFERRED
               STOCK CONVERSION.

               In response to the Staff's comments, the Company has revised the
               disclosure contained in Appendix D of our previous response and
               attached it as Appendix B to this letter.

          (B)  IN ADDITION TO PROVIDING THE EXERCISE PRICE, INCLUDE THE
               ESTIMATED FAIR VALUE AT GRANT DATE AND THE AMOUNT OF ANY
               COMPENSATION EXPENSE OR UNEARNED COMPENSATION YOU RECORDED.

               In response to the Staff's comments, the Company has revised the
               disclosure contained in Appendix D of our previous response and
               attached it as Appendix B to this letter.

          (C)  FOR STOCK OR STOCK BASED AWARDS GRANTED TO NON-EMPLOYEES,
               INDICATE WHETHER YOU RECORDED THE FAIR VALUE OF THE SERVICES OR
               THE FAIR VALUE OF THE EQUITY INSTRUMENT AND, IF SO, HOW YOU
               DETERMINED THAT VALUE - E.G., OPTION-PRICING MODEL.

               In response to the Staff's comment, the Company has revised the
               disclosure on page F-32.

          (D)  TELL US WHEN YOU BEGAN HOLDING DISCUSSIONS WITH YOUR
               UNDERWRITERS.

               The Company supplementally advises that it began discussions with
               the underwriters in March 2004.





                                     - 14 -


          (E)  WE WILL NOT CONCLUDE OUR EVALUATION OF YOUR RESPONSE UNTIL YOU
               HAVE INCLUDED AN OFFERING PRICE IN THE FILING.

               The Company notes the Staff's comment, the prospectus will be
               amended to include offering price information as soon as it is
               available.

     51.  FOR OPTIONS GRANTED DURING THE TWELVE MONTHS PRIOR TO THE DATE OF THE
          MOST RECENT BALANCE SHEET, PLEASE DISCLOSE THE FOLLOWING IN NOTE 13 TO
          YOUR FINANCIAL STATEMENTS:

          (A)  FOR EACH GRANT DATE, THE NUMBER OF OPTIONS GRANTED, THE EXERCISE
               PRICE, THE FAIR VALUE OF YOUR COMMON STOCK, AND THE INTRINSIC
               VALUE (IF ANY) PER OPTION.

               In response to the Staff's comment, the Company supplementally
               advises that the 1,352,500 options granted in December 2003,
               represent the only options granted in the twelve months prior to
               June 30, 2004 and since Note 13 adequately discusses these
               options no further disclosure is believed to be required.

          (B)  WHETHER THE VALUATION WAS CONTEMPORANEOUS OR RETROSPECTIVE.

               In response to the Staff's comment, the Company has revised the
               disclosure on page F-32.

          (C)  IF THE VALUATION SPECIALIST WAS A RELATED PARTY, PLEASE DISCLOSE
               THAT FACT.

               In response to the Staff's comment, the Company has revised the
               disclosure on page F-32.

     52.  SINCE YOUR VALUATION WAS RETROSPECTIVE, WE BELIEVE THAT THESE
          DISCLOSURES WOULD BE HELPFUL TO AN INVESTOR SINCE CHANGES IN YOUR
          METHODOLOGIES AND ASSUMPTIONS COULD HAVE A MATERIAL IMPACT UPON YOUR
          FINANCIAL STATEMENTS. PLEASE REVISE TO PROVIDE THE FOLLOWING
          DISCLOSURES IN MD&A:

          (A)  THE AGGREGATE INTRINSIC VALUE OF ALL OUTSTANDING OPTIONS BASED ON
               THE MIDPOINT OF THE ESTIMATED IPO PRICE RANGE.

               In response to the Staff's comment, the Company has revised the
               disclosure on pages 34 and 35.

          (B)  DISCUSS THE SIGNIFICANT FACTORS, ASSUMPTIONS AND METHODOLOGIES
               USED IN DETERMINING FAIR VALUE FOR THOSE OPTIONS GRANTED DURING
               THE TWELVE MONTHS PRIOR TO THE DATE OF THE MOST RECENT BALANCE
               SHEET.

               In response to the Staff's comment, the Company has revised the
               disclosure on pages 34 and 35.





                                     - 15 -


          (C)  DISCUSS EACH SIGNIFICANT FACTOR CONTRIBUTING TO THE DIFFERENCE
               BETWEEN THE FAIR VALUE AS OF THE DATE OF GRANT AND THE ESTIMATED
               IPO PRICE FOR OPTIONS GRANTED DURING THE TWELVE MONTHS PRIOR TO
               THE DATE OF THE MOST RECENT BALANCE SHEET.

               In response to the Staff's comment, the Company has revised the
               disclosure on pages 34 and 35.

          (D)  DISCLOSE THE VALUATION METHOD USED AND THE REASONS WHY YOU CHOOSE
               THAT METHOD.

               In response to the Staff's comment, the Company has revised the
               disclosure on pages 34 and 35.

     If you would like to discuss any of our responses to the comments, or if
you would like to discuss any other matters, please telephone the undersigned at
(212) 880-6010 or Adam Armstrong at (416) 865-7336.


                                                    Yours truly,



                                                    Andrew J. Beck

AJB/bt

cc:    Elias Vamvakas, OccuLogix, Inc.
       David Chaikof, Torys LLP
       Marjorie Sybul Adams, Piper Rudnick LLP