Patent ID: 8097190

Claim:
A hard-coated and multi-coated optical lens comprising: (a) polymerizable compounds consisting of (i) about 30% to about 60% by weight of a mixture of isophorone diisocyanate and hexamethylene diisocyanate in a molar ratio from 0.1112:1 to 2.3343:1, and (ii) about 40% to about 70% by weight of pentaerythritol tetrakis(3-mercaptopropionate), or a mixture of pentaerythritol tetrakis(3-mercaptopropionate) and pentaerythritol tetrakis(mercaptoacetate); and (b) additives comprising about 0.005% to about 6% by weight of a UV absorber, about 0.001% to about 5% by weight of a release agent and about 0.01% to about 5% by weight of a polymerization initiator, based on the total weight of the polymerizable compounds (a); wherein the composition has a solid refractive index (nD) of about 1.53 to about 1.57, and an Abbe number of about 35 to about 48; wherein the hard-coating comprises a silane compound and one or more colloidal metal oxides; and wherein the multi-coating comprises one or more anti-reflective layers.