Method of shaping an ophthalmic lens

A method of shaping an ophthalmic lens (20), the method comprising machining the edge face (23) of the lens (20) by means of at least one rotary tool having an axis, the axes of the tool and of the lens being movable relative to each other in rotation about a blocking axis (C) and in translation, both radially and axially, these freedoms of movement being controlled so that the edge face (23) of the lens presents a generally profiled shape that includes an engagement ridge (24) suitable for engaging in a bezel (11) of a rim (14) of an eyeglass frame (10), and first and second margins (26, 27) on either side of the engagement ridge (24);

• the method being characterized in that given a first longitudinal curve (28) of the first margin (26) and a second longitudinal curve (29) of the second margin (27), the edge face (23) of the lens (20) is machined in such a manner that, at each axial section (Si) of the lens (20), the traces (Q2i, Q3i) in said axial section (Si) of the first and second longitudinal curves (28, 29) of the two margins (26, 27) present respective first and second distances (T1i, T2i) from the blocking axis (C) of the lens (20), with the difference therebetween being a function, referred to as an “altitude difference function”, of the position of the plane (X) of the axial section (Si) under consideration along the edge face (23) of the lens (20), which function is not entirely uniform.