Patent ID: 7848843

Claim:
An eyeglass lens processing apparatus for processing a peripheral edge of an eyeglass lens based on target lens shape data, comprising: a mode setting unit which shifts a processing mode to a two-step processing mode in which a cup for attaching the lens to a chuck axis is changed from a large diameter cup to a small diameter cup on the way of processing; a roughing path data computing unit for computing first roughing path data larger than the target lens shape data by a predetermined finishing margin, and second roughing path data having a radius vector larger by at least Δa than at least radius vector data of the large diameter cup based on the first roughing path data and the radius vector data of the large diameter cup, Δa being a length set to avoid processing interference between a roughing tool and the large diameter cup; and a processing controller for roughing the peripheral edge of the lens attached to the large diameter cup based on the second roughing path data in response to a processing start signal, thereafter stopping the processing and further resuming the processing, wherein the processing controller performs, when a processing resuming signal is inputted, processing control of either finishing the peripheral edge using a finishing tool after roughing the peripheral edge of the lens replaced with the small diameter cup based on the first roughing path data using the roughing tool, or finishing the peripheral edge based on finishing path data using the finishing tool without roughing.