Bevel Edgers shape ophthalmic lens blanks at an optical dispensary, most dispensers have a mechanical pattern bevel edger lens grinder machine for grinding a lens blank to the final shape required to mount the lens within a particular glasses frame. In accordance with this practice, lens blanks are provided with the proper prescription to remedy the visual impairment of the person that is to wear the glasses. The selected lens blank is then mounted in the lens grinder bevel edger machine where it is cut to the shape required to fit the frames the finished lens is to be mounted on under control of a correspondingly dimensioned mechanical pattern.