Patent ID: 8460056

Claim:
A shaper device ( 200 ) for shaping an ophthalmic lens ( 20 ), the device comprising: a blocking support ( 202 , 203 ) for blocking the ophthalmic lens on a blocking axis (A 7 ); a shaper tool ( 210 , 212 ) for shaping the ophthalmic lens, the tool being movable relative to said blocking support ( 202 , 203 ); an electronic or computer unit ( 251 ) for controlling the position of said shaper tool ( 210 , 212 ) relative to said blocking support ( 202 , 203 ); and a man/machine interface ( 252 ) connected to said electronic or computer unit ( 251 ) and including a display screen ( 253 ) and input means ( 254 , 255 ) for inputting numerical values; wherein said electronic or computer unit ( 251 ) is adapted to display on said display screen ( 253 ) at least three so-called “offset” fields ( 301 - 304 ) for inputting numerical values via said input means ( 254 , 255 ), said fields being displayed simultaneously or in succession, and then for generating a control setpoint for said shaper tool ( 210 , 212 ) relative to said blocking support ( 202 , 203 ) for shaping the ophthalmic lens ( 20 ) so as to form an engagement ridge ( 26 ) on its edge face ( 23 ), which ridge presents, in each axial section (S′ i ) of the ophthalmic lens ( 20 ), a profile (P′ i ) having front and rear ends that present respective first and second distances (L 1 i , L 2 i ) from the blocking axis (A 7 ) with the difference between said distances being a so-called “offset” function that is not entirely uniform around the edge face of the ophthalmic lens ( 20 ), and that depends on the numerical values input into each of the offset fields ( 301 - 304 ).