EMBEDDED CONTACT LENS WITH A HIGH REFRACTIVE INDEX INSERT THEREIN

Abstract: the invention provides a composite material suitable for making hydrogel contact lenses and especially diffractive inserts to be embedded in hydrogel contact lenses. a composite material of the invention has a relatively high refractive index (ri) and is composed of a hydrogel material and high ri nanoparticles which are distributed in the polymer matrix of the hydrogel material and present in an amount sufficient high to provide the composite material with a high ri but sufficient low to provide the composite material with a light transmissibility of 85% or greater in the range between 450 to 700 nm.

Inventor(s): Ya-Wen Chang, Steve Yun Zhang

CPC Classification: G02C7/049 ({Contact lenses having special fitting or structural features achieved by special materials or material structures})

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