Patent ID: 9625616
Date: 2017-04-18
CPC Classifications: B29D,C08L,G02B

Claim:
1. A method of manufacturing a silicone hydrogel contact lens comprising: curing a polymerizable composition comprising a siloxane monomer and a hydrophilic monomer to form a cured silicone hydrogel contact lens; hydrating the cured silicone hydrogel contact lens; extracting the hydrated silicone hydrogel contact lens with an extraction liquid comprising an aqueous solution of a single organic solvent selected from ethyl lactate, or ethylene carbonate, or propylene carbonate, or propylene glycol, or butanediol, to make an extracted silicone hydrogel contact lens; removing organic solvent from the extracted silicone hydrogel contact lens to make an ophthalmically-acceptable lens; and packaging the ophthalmically-acceptable lens, wherein: