Patent ID: 8820925

Claim:
A hydrogel contact lens, comprising: a hydrogel lens body which is the reaction product of a polymerizable composition, the polymerizable composition comprising one or more monomers, at least one crosslinker that crosslinks the one or more monomers during polymerization, and at least one polymer of 2-methacryloyloxyethyl phosphorylcholine, wherein said one or more monomers and at least one crosslinker form a first polymer component and wherein said at least one polymer of 2-methacryloyloxyethyl phosphorylcholine is physically entangled with said first polymer component in the hydrogel lens body, wherein the at least one polymer of 2-methacryloyloxyethyl phosphorylcholine is present in the hydrogel lens body such that the at least one polymer of 2-methacryloyloxyethyl phosphorylcholine is released from the lens for at least eight hours based on in vitro testing, and the at least one polymer of 2-methacryloyloxyethyl phosphorylcholine is a copolymer of 2-methacryloyloxyethyl phosphorylcholine and n-butylmethacrylate.