Patent ID: 7454264

Claim:
A method of controlling an edger device for edging an ophthalmic lens blank, comprising the steps of: providing a lens blank having first and second opposite major surfaces, and a peripheral edge therebetween; providing an edger device having a cutting mechanism for forming a bevel in the peripheral edge; providing a central processing unit operably associated with the edger device for controlling operation of the cuffing mechanism; and transmitting processing instructions from the central processing unit to the edger device, wherein the processing instructions comprise: a) forming a bevel in a peripheral edge of a lens blank, the peripheral edge having a portion lying on a first plane and the bevel having an apex extending outwardly from the first plane; b) forming a step in the peripheral edge intermediate the apex and an interface between the peripheral edge and the second major surface, the step having a base lying on a second plane spaced from and parallel to the first plane.