Patent ID: 8820928
Filing Date: 2014-09-02
Classification: C08G,C08L,G02B

Abstract:
1. A method of manufacturing a batch of silicone hydrogel contact lenses, comprising: providing polymerized silicone hydrogel contact lens bodies in contact lens mold assemblies, wherein a single polymerized silicone hydrogel contact lens body is provided in a single contact lens mold assembly, and each contact lens mold assembly comprises a first mold section having a concave optical surface for forming an anterior surface of the silicone hydrogel contact lens body and a second mold section having a convex optical surface for forming a posterior surface of the silicone hydrogel contact lens body, and the first mold section and second mold section are coupled together; separating the polymerized silicone hydrogel contact lens bodies from the contact lens mold assemblies to produce delensed contact lens bodies; washing the delensed contact lens bodies with an aqueous liquid free of volatile organic solvent to produce washed contact lenses; and sterilizing the washed contact lenses in sealed contact lens packages; wherein the batch so manufactured comprises at least twenty silicone hydrogel contact lenses, and the anterior surfaces of the sterilized contact lenses have clinically acceptable surface wettabilities such that less than five percent of the silicone hydrogel contact lenses have visually identifiable non-wetting spots when located on eyes of subjects, and wherein the non-wetting spots are discontinuities of the contact lens wearer's pre-lens tear film present on the anterior surface of the contact lens, and are visually identifiable during a slit lamp examination at a total magnification from about 6× to about 70×; wherein a polymerizable composition used to form the polymerized silicone hydrogel contact lens bodies comprises a siloxane monomer represented by formula (1): wherein m of formula (1) represents one integer from 3 to 10, n of formula (1) represents one integer from 1 to 10, R