Ophthalmic device molds and related methods

摘要

Ophthalmic device molds made from a first portion of a molding surface formed from a first polymer and a second portion of the molding surface formed from a second polymer are described. When combined, the first portion and the second portion of the molding surface form an entire molding surface suitable for molding an entire surface, such as an anterior surface or a posterior surface of an ophthalmic device. Methods of manufacturing ophthalmic devices using these molds, including contact lenses, are also described.

主权项

1. A method of manufacturing an ophthalmic device, comprising:
(a) placing a polymerizable composition comprising at least one hydrophilic monomer in direct contact with an entire molding surface configured to cast mold an anterior or posterior surface of an ophthalmic device; and (b) curing the polymerizable composition in direct contact with the entire molding surface to form a polymerized reaction product comprising a polymeric ophthalmic device body,wherein a first polymer is used to form a first portion of said molding surface configured to mold the entire anterior or posterior surface of an ophthalmic device, a second polymer is used to form a distinct second portion of said molding surface configured to mold the entire anterior or posterior surface of an ophthalmic device and, when combined, the distinct first and second portions form the entire said molding surface configured to mold the entire anterior or posterior surface of an ophthalmic device; wherein the first polymer comprises at least one vinyl alcohol copolymer which is not an ethylene-vinyl alcohol copolymer and wherein the second polymer comprises polypropylene.