Patent ID: 6659609
Filing Date: 2003-12-09
Classification: G02C

Abstract:
A device for determining eyeglass lens centering data when a client takes a position in front of a mirror with an already-selected eyeglass frame comprising:a housing which is height-adjustable by means of a lift column, the housing supporting a digital video camera in which the objective lens together with a mirror and a light source is located in the region of the front panel of the housing and including a digital computer connected to the digital video camera, and a superposable frame mountable on the eyeglass frame, the superposable frame including a sighting device with a scale from which the tilting of the eyeglasses is readable, the computer monitoring a head position of the client and tilting of the eyeglasses which is displayed on a monitor screen, the superposable frame has calibration points at a predetermined spacing which matches an average distance between the eyes, and the computer sequentially determines a position of the calibration points on the monitor screen after freezing an image of the client by controlling the individual calibration points by causing an enclosure to appear box automatically on the screen, which box determines a brightness center point of the calibration points, a position of two reflection points of a light source on a cornea of the client imaged on the monitor screen with the enclosure, and determine a position of the two reflection points of the light source on the cornea imaged on the monitor screen using the enclosure.