Patent ID: 7540609

Claim:
A polymerizable composition comprising α-ω-bis(methacryloyloxyethyl iminocarboxy ethyloxypropyl)-poly(dimethylsiloxane)-poly(trifluoropropylmethylsiloxane)-poly(ω-methoxy-poly(ethyleneglycol)propylmethylsiloxane), N-vinyl-N-methylacetamide, methylmethacrylate, ethylene glycol dimethacrylate, allyloxy alcohol, and a free radical initiator, which when formed into a lens body has an equilibrium water content of from about 40% to about 65% by weight, characterized in that at least one of the following conditions are met: (i) about 34 percent by weight α-ω-bis(methacryloyloxyethyl iminocarboxy ethyloxypropyl)-poly(dimethylsiloxane)-poly(trifluoropropylmethylsiloxane)-poly(ω-methoxy-poly(ethyleneglycol)propylmethylsiloxane), (ii) about 46 percent by weight N-vinyl-N-methylacetamide, (iii) about 17 percent by weight methylmethacrylate, (iv) about 0.5 percent by weight ethylene glycol dimethacrylate, and (v) about 1 percent by weight allyloxy alcohol.