EXHIBIT 11

                       MENTOR CORPORATION AND SUBSIDIARIES
              STATEMENT REGARDING COMPUTATION OF PER SHARE EARNINGS
                    (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>

                                                                THREE MONTHS ENDED                      NINE MONTHS ENDED
                                                                   DECEMBER 31,                            DECEMBER 31,
                                                          

                                                              1995                1994               1995               1994
PRIMARY:
                                                                
<S>                                                       <C>                    <C>                  <C>            <C>         
PRIMARY EARNINGS                                          $  6,143               $  4,198             $  17,183      $  11,288  
                                                              

AVERAGE SHARES OUTSTANDING
                                                            24,746                 21,708                24,172         21,544

NET EFFECT OF DILUTIVE STOCK OPTIONS-- BASED
ON THE TREASURY STOCK METHOD USING
AVERAGE STOCK MARKET PRICE
                                                             1,981                    544                 1,682            440

                                                           
TOTAL SHARES FOR PRIMARY EARNINGS
                                                             6,727                 22,252                25,854         21,984
                                                            

                                                            
PRIMARY EARNINGS PER SHARE                                $    .23               $    .19             $     .66      $     .51
                                                                                             
                                                                                                              
                                                              

SUPPLEMENTAL AND FULLY DILUTED:

PRIMARY EARNINGS                                          $  6,143               $  4,198            $   17,183      $  11,288
                                                                                                       
 
INTEREST AND RELATED EXPENSES ON 6 3/4%
                DEBENTURES ELIMINATED
                                                                --                    279                   160            837

FULLY DILUTED EARNINGS                                    $  6,143               $  4,477            $   17,343      $  12,125
                                                                                                    

AVERAGE SHARES OUTSTANDING
                                                            24,746                 21,708                24,172         21,544

NET EFFECT OF DILUTIVE STOCK OPTIONS--BASED
ON THE TREASURY STOCK METHOD USING THE
HIGHER OF ENDING AND AVERAGE STOCK MARKET PRICES             1,981                    602                 1,682            616
                                                              

ADDITIONAL SHARES ISSUED IN ASSUMED CONVERSION OF 6 3/4%  
DEBENTURES AT 16.50 PER SHARE                                   --                  2,932                   250          2,932
                                                           

TOTAL SHARES FOR SUPPLEMENTAL/FULLY DILUTED                 26,727                 25,242                26,104         25,092

                                                            
SUPPLEMENTAL/FULLY DILUTED EARNINGS PER SHARE             $    .23               $    .18            $      .66      $     .48
                                                                                                            
                                             
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Note: In June 1995 the Company's 6 3/4% Sub-ordinated  Convertible Debenture was
converted into shares of Common stock. The Supplemental calculation is presented
in lieu of the fully diluted calculation for six months ended September 30, 1995
and assumes  the  conversion  took place at the  beginning  of the period.  This
calculation also adds interest  expense for the period,  net of tax, back to net
income.

Note: The shares  outstanding have been adjusted to reflect a two-for-one  split
of the  Company's  Common  Stock in the  form of a 100  percent  stock  dividend
effective September 27, 1995.