Patent ID: 6383419
Filing Date: 2002-05-07
Classification: B29C,B29D,Y10S

Abstract:
A method of cast molding a contact lens, the method comprising the steps of:providing a first contact lens mold section; providing a molding apparatus and an insert tool adapted to be fixed to the molding apparatus at a plurality of different rotational orientations relative to the molding apparatus; fixing, at one of a plurality of different rotational orientations relative to the molding apparatus, the insert tool to the molding apparatus and producing a second mold in the molding apparatus with the insert tool fixed to the molding apparatus, wherein the second mold section includes a contour which corresponds to a toric optical zone of a contact lens; removing the second mold section from the molding apparatus and the insert tool; thereafter assembling the first and second mold sections; providing a contact lens precursor material between the first mold section and the second mold section; polymerizing the contact lens precursor material between the first and second mold sections to produce a contact lens product; and removing the contact lens product from the first and second mold sections.