Patent ID: 8556419

Claim:
A method of preparing an ophthalmic lens ( 20 ) for mounting in a surround ( 11 ) of an eyeglass frame ( 10 ), the method comprising: an acquisition step of acquiring a first longitudinal profile ( 12 ) of said surround ( 11 ) and an orientation parameter of said first longitudinal profile ( 12 ) relative to a horizon line (A 2 ) or to a verticality line (A 3 ) of said surround ( 11 ) about an orientation axis (A 1 ) that is substantially perpendicular to a mean plane of said surround ( 11 ); and an edging step of edging the ophthalmic lens ( 20 ) with an engagement ridge ( 24 ) being formed on its edge face ( 23 ), the ridge being generally profiled with a desired section and extending along a second longitudinal profile ( 25 ) that is derived from the first longitudinal profile ( 12 ) and whose orientation relative to the ophthalmic lens ( 20 ) about said orientation axis (A 1 ) is derived from said orientation parameter; wherein the method includes a determination step of determining at least one singular portion (Z 1 -Z 56 ) of the second longitudinal profile ( 25 ) as a function of said orientation parameter; and in that during the edging step, the engagement ridge ( 24 ) is formed so as to present a section that is reduced in width or in height over said singular portion (Z 1 -Z 56 ).