Fully polymerized UV blocking silicone hydrogel lens

摘要

A substantially fully copolymerized UV blocking hydrogel lens demonstrating sufficient blocking of UV light to meet at least FDA Class II specifications for UV blocking formed from a reaction mixture comprising at least NVP and one other comonomer and a free-radical polymerizable, substituted or unsubstituted, Bis O-hydroxy benzophenone is provided herein.

主权项

1. A UV blocking contact lens blocking more than 70% UVA light and 95% UVB light, containing entrained PVP and having a water content of 42.3% to 59.1% when fully hydrated, wherein the lens is formed from a reaction mixture comprising at least N-vinylpyrrolidone and at least one other comonomer and a free-radical polymerizable, substituted or unsubstituted, Bis O-hydroxybenzophenone, wherein PVP is formed in situ during cure of the reaction mixture.