"D is a divalent linking group, and G is a reactive functional group selected from the group consisting of...http://www.google.ca/patents/US7781496?utm_source=gb-gplus-sharePatent US7781496 - Intraocular lens made from a polymer of an aryl(alkyl) (meth)acrylate in which the aryl ring is substituted by a hydrophilic group: carboxy acid, mono-, di- or trihydroxyalkyl, or carboxamide; a C1-10 (meth)ac" . . . .