Lenses from polymeric derivatives of acrylic and methacrylic acids

Abstract From the Canadian patent

An object of the invention is a lens made from a non-hydrophilic acrylate or methacrylate polymer or copolymer and designated for application in a water medium inside a human eye or on its surface, i.e. an intraocular or contact lens the originally, non-hydrophilic surface layer of which was additionally hydrophilized by a partial hydrolysis or sulfonation in such a way, that the gradient of swelling results where the swelling continuously changes from its maximum on the very surface to the minimum in the non-swelling core unaffected by hydrophilization. In this way light reflexes are removed or at least substantially reduced as well as the tendency to the surface growth of cells, …