Patent ID: 8167680

Claim:
A method of edging an ophthalmic lens ( 31 ), the method comprising: turning the lens ( 31 ) about a first axis of rotation (A 2 ) and working on an edge face of the lens ( 31 ) by one of a beveling grindwheel and a cutter ( 34 ; 341 ) provided with one of a beveling groove and a chamfer ( 92 ) and mounted to rotate about a second axis of rotation (A 4 ; A 42 ), wherein while machining the edge face ( 300 ) of the lens with one of the beveling grindwheel and the cutter ( 34 ), the second axis of rotation (A 4 ; A 42 ) and the first axis of rotation (A 2 ) are moved dynamically relative to each other in at least one degree of freedom to adjust an orientation of a tangent to a curve of the working portion of one of the beveling groove and the chamfer ( 92 ) relative to the first axis (A 2 ), this relative movement being controlled as a function of an angle of rotation (T) of the lens ( 31 ) about said first axis of rotation (A 2 ), in such a manner that during machining of each portion of the edge face of the lens ( 31 ), said tangent remains parallel to the tangent (T 1 , T 2 , T 3 ) to the curve of the bevel desired on said portion of the edge face ( 300 ).