Bausch-lomb Incorporated

Richard J Fleenor

Kenneth L Opdyke

An improved method for generating a toric surface on a molding tool for forming contact lens molds comprises:

Method of generating a toric surface on a molding tool

An improved method for generating a toric surface on a molding tool for forming contact lens molds comprises: providing a tool which comprises an elongated body and a molding portion at one end of the tool, wherein the molding portion comprises a surface which is substantially spherical; applying a force to the elongated body so as to distort the spherical surface of the molding portion; machining a substantially spherical curve in the distorted surface while maintaining the applied force; and releasing the applied force, wherein the spherically cut surface assumes a toric shape upon release of the applied force.

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Stafford, NY, United States of America

Richard J Fleenor