SECURITIES & EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             ----------------------

                                  SCHEDULE 13G
                                 (Rule 13d-102)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED
                              PURSUANT TO 13d-2(b)

                                (Amendment No. )*

                               MENTOR CORPORATION
                                (Name of Issuer)

                    Common Shares, $0.10 par value per share
                         (Title of Class of Securities)


                                    587188103
                                 (CUSIP Number)


                                November 20, 2007
             (Date of event which requires filing of this statement)


     Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

     [ ]  Rule 13d-1(b)
     [x]  Rule 13d-1(c)
     [ ]  Rule 13d-1(d)





                              (Page 1 of 15 Pages)
---------------
     *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 purposes 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).





CUSIP No. 587188103                 13G                Page 2 of 15 Pages



-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            HealthCor Management, L.P.

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
            20-2893581
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0

SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    2,159,691
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    2,159,691
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            2,159,691
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            6.4%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            PN
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                 13G                Page 3 of 15 Pages



-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            HealthCor Asssociates, LLC

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
            20-2891849
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0

SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    2,159,691
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    2,159,691
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            2,159,691
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            6.4%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            OO - limited liability company
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                 13G                Page 4 of 15 Pages


-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            HealthCor Offshore, Ltd.

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            Cayman Islands
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0

SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    1,370,769
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    1,370,769
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            1,370,769
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            4.0%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            OO - limited company
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                 13G                Page 5 of 15 Pages



-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            HealthCor Hybrid Offshore, Ltd.

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            Cayman Islands
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0

SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    330,197
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    330,197
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            330,197
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            1.0%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            OO - limited company
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                 13G                Page 6 of 15 Pages


-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            HealthCor Group, LLC

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
            51-0551771
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0

SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    399,034
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    399,034
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            399,034
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            1.2%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            OO - limited liability company
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                 13G                Page 7 of 15 Pages


-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            HealthCor Capital, L.P.

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
            51-0551770
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0

SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    399,034
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    399,034
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            399,034
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            1.2%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            PN
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                 13G                Page 8 of 15 Pages


-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            HealthCor, L.P.

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
            20-3240266
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0

SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    399,034
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    399,034
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            399,034
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            1.2%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            PN
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                 13G                Page 9 of 15 Pages


-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            HealthCor Strategic, LLC

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
            20-2891864
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            Delaware
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0

SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    59,691
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    59,691
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            59,691
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            0.2%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            OO - limited liability company
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                 13G                Page 10 of 15 Pages


-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            Arthur Cohen

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            United States
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0

SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    2,159,691
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    2,159,691
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            2,159,691
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            6.4%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            IN
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                 13G                Page 11 of 15 Pages


-----------------------------------------------------------------------------
     (1)    NAMES OF REPORTING PERSONS
            Joseph Healey

            I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
-----------------------------------------------------------------------------
     (2)    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP **
                                                                  (a)  [X]
                                                                  (b)  [ ]
-----------------------------------------------------------------------------
     (3)    SEC USE ONLY
-----------------------------------------------------------------------------
     (4)    CITIZENSHIP OR PLACE OF ORGANIZATION
            United States
-----------------------------------------------------------------------------
NUMBER OF      (5)  SOLE VOTING POWER
                    0
SHARES         --------------------------------------------------------------

BENEFICIALLY   (6)  SHARED VOTING POWER
                    2,159,691
OWNED BY       --------------------------------------------------------------

EACH           (7)  SOLE DISPOSITIVE POWER
                    0
REPORTING      --------------------------------------------------------------

PERSON WITH    (8)  SHARED DISPOSITIVE POWER
                    2,159,691
-----------------------------------------------------------------------------
     (9)    AGGREGATE AMOUNT BENEFICIALLY OWNED
            BY EACH REPORTING PERSON
            2,159,691
-----------------------------------------------------------------------------
     (10)   CHECK BOX IF THE AGGREGATE AMOUNT
            IN ROW (9) EXCLUDES CERTAIN SHARES **                       [ ]
-----------------------------------------------------------------------------
     (11)   PERCENT OF CLASS REPRESENTED
            BY AMOUNT IN ROW (9)
            6.4%
-----------------------------------------------------------------------------
     (12)   TYPE OF REPORTING PERSON **
            IN
-----------------------------------------------------------------------------
                     ** SEE INSTRUCTIONS BEFORE FILLING OUT!





CUSIP No. 587188103                  13G                 Page 12 of 15 Pages

Item 1(a).     Name of Issuer:
               Mentor Corporation

Item 1(b).     Address of Issuer's Principal Executive Offices:
               201 Mentor Drive, Santa Barbara, California 93111

Item 2(a, b, c).     Name of Person Filing:

               (i) HealthCor Management, L.P., a Delaware limited partnership;
               Carnegie Hall Tower, 152 West 57th Street, 47th Floor, New York,
               New York 10019;

               (ii) HealthCor Associates, LLC, a Delaware limited liability
               company, Carnegie Hall Tower, 152 West 57th Street, 47th Floor,
               New York, New York 10019;

               (iii) HealthCor Offshore, Ltd., a Cayman Islands limited company,
               Carnegie Hall Tower, 152 West 57th Street, 47th Floor, New York,
               New York 10019;

               (iv) HealthCor Hybrid Offshore, Ltd., a Cayman Islands limited
               company, Carnegie Hall Tower, 152 West 57th Street, 47th Floor,
               New York, New York 10019;

               (v) HealthCor Group, LLC, a Delaware limited liability company,
               Carnegie Hall Tower, 152 West 57th Street, 47th Floor, New York,
               New York 10019;

               (vi) HealthCor Capital, L.P., a Delaware limited partnership,
               Carnegie Hall Tower, 152 West 57th Street, 47th Floor, New York,
               New York 10019;

               (vii) HealthCor, L.P., a Delaware limited partnership, Carnegie
               Hall Tower, 152 West 57th Street, 47th Floor, New York, New York
               10019;

               (viii) HealthCor Strategic, LLC, a Delaware limited liability
               company, Carnegie Hall Tower, 152 West 57th Street, 47th Floor,
               New York, New York 10019;

               (ix) Joseph Healey; Carnegie Hall Tower, 152 West 57th Street,
               47th Floor, New York, New York 10019; and

               (x) Arthur Cohen, 12 South Main Street, #203 Norwalk, Ct 06854.
               Both Mr. Healey and Mr. Cohen are United States citizens.

               The persons at (i) through (x) above are collectively referred to
               herein as the "Reporting Persons".

Item 2(d).     Title of Class of Securities: common stock, par value $0.01 per
               share (the "Common Stock")

Item 2(e).     CUSIP Number:  587188103

Item 3.               Not applicable.





CUSIP No. 587188103                  13G                 Page 13 of 15 Pages

Item 4.   Ownership.

             The information required by Items 4(a) - (c) is set forth in Rows 5
             - 11 of the cover page for each Reporting Person hereto and is
             incorporated herein by reference for each such Reporting Person.

             Collectively, HealthCor, L.P., Healthcore Offshore, Ltd., HealthCor
             Hybrid Offshore, Ltd. and HealthCor Strategic, LLC (each a "Fund"
             and together, the "Funds") are the beneficial owners of a total of
             2,159,691 shares of the Common Stock of the Issuer. By virtue of
             its position as the investment manager of the Funds, HealthCor
             Management, L.P. may be deemed a beneficial owner of all the shares
             of Common Stock owned by the Funds. HealthCor Associates, LLC is
             the general partner of HealthCor Management, L.P. and thus may also
             be deemed to beneficially own the shares of Common Stock that are
             beneficially owned by the Funds.

             HealthCor Group LLC is the general partner of HealthCor Capital,
             L.P., which is in turn the general partner of HealthCor, L.P.
             Accordingly, each of HealthCor Captial L.P. and HealthCor Group,
             LLC may be deemed to beneficially own the shares of Common Stock
             that are beneficially owned by HealthCor, L.P.

             As the Managers of HealthCor Associates, LLC, Arthur Cohen and
             Joseph Healey exercise both voting and investment power with
             respect to the shares of Common Stock reported herein, and
             therefore each may be deemed a beneficial owner of such Common
             Stock.

             Each of the Reporting Persons hereby disclaims any beneficial
             ownership of any such Shares in excess of their actual pecuniary
             interest therein.


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 [ ].

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





CUSIP No. 587188103                13G                Page 14 of 15 Pages

Item 10.  Certification.

             By signing below I certify that, to the best of my knowledge and
             belief, the securities referred to above were not acquired and are
             not held for the purpose of or with the effect of changing or
             influencing the control of the issuer of the securities and were
             not acquired and are not held in connection with or as a
             participant in any transaction having that purpose or effect.

Exhibits:

Exhibit I: Joint Acquisition Statement, dated as of November 29, 2007.





CUSIP No. 587188103                13G                Page 15 of 15 Pages

                                 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:  November 29, 2007

                                  HEALTHCOR MANAGEMENT, L.P., for itself and
                                  as manager on behalf of (i) HEALTHCOR
                                  OFFSHORE, LTD., (ii) HEALTHCOR HYBRID
                                  OFFSHORE, LTD. and (iii) HEALTHCOR STRATEGIC,
                                  LLC

                                  By: HealthCor Associates, LLC, its general
                                      partner


                                      By: /s/ Steven J. Musumeci
                                      -------------------------------
                                      Name:  Steven J. Musumeci
                                      Title: Chief Operating Officer


                                  HEALTHCOR CAPITAL L.P., for itself and as
                                  manager on behalf of HEALTHCOR L.P.

                                  By: HealthCor Group, LLC, its general partner

                                      By: /s/ Steven J. Musumeci
                                      -------------------------------
                                      Name:  Steven J. Musumeci
                                      Title: Chief Operating Officer


                                    HEALTHCOR ASSOCIATES, LLC

                                    By: /s/ Steven J. Musumeci
                                    ------------------------------
                                    Name:  Steven J. Musumeci
                                    Title: Chief Operating Officer

                                    HEALTHCOR GROUP, LLC

                                    By: /s/ Steven J. Musumeci
                                    ------------------------------
                                    Name:  Steven J. Musumeci
                                    Title: Chief Operating Officer


                                    /s/ Joseph Healey
                                    ------------------------------
                                    JOSEPH HEALEY, Individually


                                   /s/ Arthur Cohen
                                   ------------------
                                   ARTHUR COHEN, Individually





                                    EXHIBIT 1

              JOINT ACQUISITION STATEMENT PURSUANT TO RULE 13d-1(k)

         The undersigned acknowledge and agree that the foregoing statement on
Schedule 13G is filed on behalf of each of the undersigned and that all
subsequent amendments to this statement on Schedule 13G shall be filed on behalf
of each of the undersigned without the necessity of filing additional joint
acquisition statements. The undersigned acknowledge that each shall be
responsible for the completeness and accuracy of the information concerning the
others, except to the extent that he or it knows or has reason to believe that
such information is inaccurate.

Dated:   November 29, 2007

                                  HEALTHCOR MANAGEMENT, L.P., for itself and
                                  as manager on behalf of (i) HEALTHCOR
                                  OFFSHORE, LTD., (ii) HEALTHCOR HYBRID
                                  OFFSHORE, LTD. and (iii) HEALTHCOR STRATEGIC,
                                  LLC

                                  By: HealthCor Associates, LLC, its general
                                      partner


                                      By: /s/ Steven J. Musumeci
                                      -------------------------------
                                      Name:  Steven J. Musumeci
                                      Title: Chief Operating Officer


                                  HEALTHCOR CAPITAL L.P., for itself and as
                                  manager on behalf of HEALTHCOR L.P.

                                  By: HealthCor Group, LLC, its general partner

                                      By: /s/ Steven J. Musumeci
                                      -------------------------------
                                      Name:  Steven J. Musumeci
                                      Title: Chief Operating Officer


                                    HEALTHCOR ASSOCIATES, LLC

                                    By: /s/ Steven J. Musumeci
                                    ------------------------------
                                    Name:  Steven J. Musumeci
                                    Title: Chief Operating Officer

                                    HEALTHCOR GROUP, LLC

                                    By: /s/ Steven J. Musumeci
                                    ------------------------------
                                    Name:  Steven J. Musumeci
                                    Title: Chief Operating Officer


                                    /s/ Joseph Healey
                                    ------------------------------
                                    JOSEPH HEALEY, Individually


                                   /s/ Arthur Cohen
                                   ------------------
                                   ARTHUR COHEN, Individually