Patent ID: 8109631
Filing Date: 2012-02-07
Classification: B29D,G02C

Abstract:
1. A method for manufacturing an ophthalmic progressive addition lens with customized design features adapted to a wearer, the method comprising the following steps: /a/ a providing step of a lens substrate; /b/ a modifying step in which a first target virtual lens is provided and modified so as to obtain a second target virtual lens, the second target virtual lens having a design feature parameter substantially equal to a customized design feature parameter, wherein a “virtual lens” is a lens which does not exist in reality such as a computer generated lens and whose front and rear faces are numerically defined, and which is used to perform optical or surface calculations or which results from such calculations; /c/ an optimizing step in which an optimized trial virtual lens is obtained by optimizing a trial virtual lens in such a manner that the optimized trial virtual lens has optical characteristics which are substantially equal to the characteristics of the second target virtual lens; and /d/ a manufacturing step of the ophthalmic progressive addition lens from the lens substrate according to the optimized trial virtual lens.