The method includes the steps of: providing spectacles including a template eyeglass having a mounting portion inserted in a groove of an arc and being to be replaced by a prescription eyeglass having a step-back portion with the same conformation as the mounting portion; providing a set of visible marks on the template eyeglass independently of the arc; having an outline editor providing a visualization of the template eyeglass provided with the visible marks; determining through observation of the spectacles the locationwith respect to the visible marksof points of the arc from which the template eyeglass projects; entering on the provided visualization the so determined locations of the points of the arc; and outputting from the editor the data representative of an edited outline based on the point locations so entered on the provided visualization, whereby the edited outline is the outline of the shoulder.

A method for producing an instruction for bevelling an ophthalmic lens, with a view to mounting same in a framework of a spectacle frame into which a bevelled display lens is initially fitted. The method includes the steps of: a) acquiring a correction parameter relative to the play between the framework and the display lens; b) capturing a surface image of the display lens previously removed from the framework; c) determining, on the surface image, an initial contour (C0) of the display lens; d) calculating a corrected contour (C1), by correcting the initial contour according to the correction parameter; and e) deriving the bevelling instruction according to the corrected contour.

A controller 240 that gives an instruction of edging a spectacle lens, to a lens edger based on frame shape data outputted from a spectacle frame measuring machine, includes: recognition parts 240a, 240b that recognize a positional relation between a groove shape of the spectacle frame whose frame shape data is measured, and a measurement reference point being a reference when measuring the frame shape data, and a positional relation between a beveling instruction reference point being a reference when a beveling instruction is given to the lens edger and a bevel shape obtained by the beveling; and a beveling amount correcting part 240d that corrects a beveling amount when giving an instruction of beveling to the lens edger based on each positional relation recognized by the recognition parts 240a, 240b, so that the bevel shape is fitted into the groove shape.

A method of preparing an ophthalmic lens (30) to be fitted into a surround of a spectacle frame, includes: acquiring a longitudinal profile (50) of the surround; centering the longitudinal profile; acquiring the geometry of at least one part of an optical face of the ophthalmic lens; calculating a treatment setpoint for treating the ophthalmic lens; and treating the ophthalmic lens. The acquiring operation includes a step of calculating the bidimensional coordinates of a plurality of measurement points (Pi, Pi) situated along two distinct longitudinal strands (51, 52) which are chosen in such a way that they define between them a band which extends along the longitudinal profile, and a step of examining the ophthalmic lens to acquire the tridimensional coordinates for the measurement points with a view to calculating the treatment setpoint.