Patent ID: 9164294
Filing Date: 2015-10-20
Classification: B24B,B29D,G02C

Abstract:
1. Method for manufacturing spectacle glasses, comprising: prefabricating a blank without cutting, the prefabricated blank having a front side not to be finished and an opposite back side, the front side and the back side of the prefabricated blank having at least one optical focus in common; finishing the back side of the prefabricated blank with a CNC machine, wherein the finishing comprises calculating a prescription surface on the basis of a prescription of a person, the prescription describing the vision defects of a left and a right eye of the person, and machining the back side to the prescription surface, such that after the machining, the machined back side and the front side of the prefabricated blank together form a first prescription lens and a second prescription lens within the prefabricated blank, wherein the first and second prescription lenses each comprise an upper edge and a lower edge, and wherein the upper edges or the lower edges are arranged closer to each other, within the prefabricated blank, than the other of the upper edges and the lower edges; and making first and second spectacle glasses by separating the first prescription lens from the second prescription lens, respectively, and by adapting a contour of the first prescription lens and the second prescription lens to a given spectacle frame, wherein focal points of the first spectacle glass correct the vision defect of the left eye of the person and focal points of the second spectacle glass correct the vision defect of the right eye of the person.