CAST MOLDING TORIC CONTACT LENSES

摘要

A system and a method of cast molding toric contact lenses permits aligning first and second mold sections at multiple rotational positions. Each mold section includes a set of alignment features that engage with complementary alignment features on the other mold section.

主权项

1. A contact lens mold assembly comprising:
a first contact lens mold section and a second contact lens mold section which are alignable at multiple rotational positions with respect to one another and each of which includes a molding surface; the molding surface of one of the first and second mold sections shaped to provide a molded contact lens with a stabilization feature, and the molding surface of the other of the first and second mold sections shaped to provide a molded contact lens with an optical zone having a cylindrical optical correction; the molding surface of one of the first and second mold sections including an anterior contact lens-molding surface, and the molding surface of the other of the first and second mold sections including a posterior contact lens-molding surface; the first mold section includes a first set of rotational alignment features disposed angularly symmetrically on a circumference surrounding the first mold section lens-molding surface, and the second mold section includes a second set of rotational alignment features disposed angularly asymmetrically on a circumference surrounding the second mold section lens-molding surface.