Patent ID: 8419183

Claim:
A method of preparing an ophthalmic lens ( 10 ) for mounting in a rim ( 21 ) of an eyeglass frame ( 20 ), the method comprising the steps of: acquiring a frame of reference of the ophthalmic lens ( 10 ) defined at least by a first centering point (P 1 ) and by a first orientation direction ( 11 ); acquiring firstly a frame of reference of the rim ( 21 ) of the eyeglass frame ( 20 ) defined at least by a second centering point (Pc) and by a second orientation direction ( 32 ), and secondly a longitudinal profile ( 30 , 30 ′) that is representative of the shape of the rim ( 21 ) and that is identified in the frame of reference of the rim ( 21 ); and putting the frames of reference of the ophthalmic lens ( 10 ) and of the rim ( 21 ) of the eyeglass frame ( 20 ) into coincidence, by positioning the two centering points (P 1 , Pc) relative to each other and by orienting the two orientation directions ( 11 , 32 ) relative to each other in such a manner as to define the position and the orientation of the longitudinal profile ( 30 , 30 ′) in the frame of reference of the ophthalmic lens ( 10 ); wherein the method includes a step of acquiring a curvature parameter (alpha curve ) or a curvature compensation parameter (dtheta) relating to the camber of the eyeglass frame ( 20 ), and in that the relative orientation of the two orientation directions ( 11 , 32 ) is determined as a function of said acquired curvature (alpha curve ) or curvature compensation (dtheta) parameter.