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Abstract

High refractive index copolymers suitable for use in ophthalmic devices are disclosed. The copolymers comprise a) two or more monomers of the structure: ##STR1## wherein: X is H or CH.sub.3 ; m is 0-10; Y is nothing, O, S, or NR wherein R is H, CH.sub.3, C.sub.n H.sub.2n+1 (n=1-10), iso-OC.sub.3 H.sub.7, C.sub.6 H.sub.5, or CH.sub.2 C.sub.6 H.sub.5 ; Ar is any aromatic ring which can be unsubstituted or substituted with H, CH.sub.3, C.sub.2 H.sub.5, n-C.sub.3 H.sub.7, iso-C.sub.3 H.sub.7, OCH.sub.3, C.sub.6 H.sub.11, Cl, Br, C.sub.6 H.sub.5, or CH.sub.2 C.sub.6 H.sub.5 ; a crosslinking monomer having a plurality of polymerizable ethylenically unsaturated groups, and b) a total of about 5 mole % or less of one or more monomers of the structure: ##STR2## wherein: X is H or CH.sub.3 ; W is --CH.sub.3 or (CH.sub.2.dbd.C(--X)--C(.dbd.O)--); and n is such that the weight average molecular weight is approximately 600-1000 if W is --CH.sub.3 and approximately 400-1000 if W is (CH.sub.2.dbd.C(--X)--C(.dbd.O)--).

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First Claim