Patent ID: 6848969

Claim:
A process to machine spectacle lenses using a spectacle lens-machining machine, the process comprising the steps of: positioning a rough-cast lens on a holder of the spectacle lens-machining machine, the rough-cast lens having an optical surface and an edge; machining at least one of the optical surface and the edge of the rough-cast lens in accordance with spectacle lens-machining values stored in a control device, the machining including a machining process selected from the group consisting of edge machining, grinding, prismatic machining, prismatic cutting, peripheral edge grinding, and polishing, the spectacle lens-machining values being determined in accordance with at least one of predetermined optical values and shape-related values of the rough-cast lens; checking a position of the rough-cast lens on the holder during the machining of the rough-cast lens to determine whether the rough-cast lens displaces on the holder, the checking being performed using a sensor; determining a displacement value of the rough-cast lens if the checking step determines that the rough-cast lens displaces on the holder; and updating the spectacle lens-machining values stored in the control device in accordance with the displacement value of the rough-cast lens during the machining of the rough-cast lens.