Patent ID: 6965385

Claim:
Method for demonstrating an effect of a particular spectacle frame and of virtual optical lenses fitted into this spectacle frame on an appearance of a spectacles wearer as it would be perceived by a virtual observer, comprising: (a) preparing at least one image of a face of the spectacles wearer such that the at least one image can be computer processed; (b) determining an arrangement of the particular spectacle frame in front of the eyes of the spectacles wearer, (c) projecting the at least one image of the face onto a plane by way of a computation of principal rays passing through a center of rotation of an eye of the virtual observer, thereby producing a planar image of the face in the plane, and (d) taking into account an optical power of a region, through which a principal ray passes, of each of the optical lenses virtually fitted in a respective lens rim, and an arrangement of the lenses in front of the eye in computing paths of principal rays which lie within lens rims of the spectacle frame or edges of the spectacle lenses, so that the virtual observer of the thus-produced planar image of the face with “worn” spectacles can assess a distortion of an eyes portion of the face by the spectacle lenses and therewith a quality of the spectacle lenses.