Patent ID: 8132909

Claim:
A method of preparing an ophthalmic lens ( 120 ) for mounting in a surround ( 110 ) of an eyeglass frame ( 100 ), the surround ( 110 ) presenting a generally profiled shape with an inside face ( 114 ) provided with a first engagement ridge or groove ( 111 ) and lying between a rear margin ( 116 ) for being turned towards the face of the wearer of the eyeglass frame ( 100 ) and an opposite front margin ( 115 ), the method comprising: a first acquisition step of acquiring the three-dimensional shape of an acquired longitudinal profile (P 1 ) running along said inside face ( 114 ); and a step of shaping the ophthalmic lens ( 120 ) so as to form on its edge face a second engagement ridge or groove ( 123 ) extending along a deduced longitudinal profile (P 3 ) of three-dimensional shape that is calculated as a function of the shape of said acquired longitudinal profile (P 1 ); wherein the method includes a second acquisition step of acquiring a geometrical characteristic (H 1 ) relating to the position of the first engagement ridge or groove ( 111 ) relative to said front and/or rear margin ( 115 and/or 116 ) in an axial direction substantially perpendicular to a general plane of the eyeglass frame ( 100 ), and in that the shape of the deduced longitudinal profile (P 3 ) is also calculated as a function of said geometrical characteristic (H 1 ).