METHOD OF OPTIMIZING A SUPPORT MATERIAL FOR AN OPERATION OF SURFACING OF A LENS BLANK

A method of preparing a lens blank (BLA) for a further operation of surfacing of said lens blank wherein the lens blank is fastened to a support (SUPP) which includes a support base (BASE) and a support material (MAT) via which the lens blank is fastened to the support base. The support material is arranged to define a support material shape having a circular periphery. The operation of surfacing is configured to transform the lens blank into a surfaced lens having a surfaced lens shape at the end thereof. The method is implemented using a processing module and comprises: - determining the surfaced lens shape based on input data, - based on the surfaced lens shape, determining a maximum diameter of said support material shape as a function of a predetermined maximum thickness defining the maximum thickness of the support material which is allowed to be cut into during the surfacing of the lens blank, - choosing a diameter (D) for the support material shape inferior or equal to said maximum diameter for further fastening of the lens blank to the support by forming the support material so that the support material shape has a diameter corresponding to the chosen diameter.