Abstract: The present application discloses a polymeric plastic material suitable for contact lenses. It is made from a monomer having the formula ##EQU1## wherein n is 2 or 3, in the substantial absence of diunsaturated and polyunsaturated monomers. The mixture subjected to polymerization may also contain as an additional comonomer a compound having the formula ##EQU2## wherein R is hydrogen or CH.sub.3, and R' is a lower alkyl group, or a group (C.sub.2 H.sub.4 O).sub.m H where m is an integer of at least 1. The application also discloses a post-heating or post-curing step, the machining of the plastic into contact lenses followed by washing in dilute alkali to neutralize any residual acid material within the plastic, followed in turn by heating in normal saline or isotonic solution to make the lens compatible with the eyeball.

Abstract: A polymeric plastic material suitable for contact lenses, dental liners and other prosthetic devices, intrauterine devices, and other devices to be used in or in the treatment of the body. It is made from a monomer having the ##STR1## wherein n is 2 or 3, polymerized with polyvinyl pyrrolidone or polyvinyl pyrrolidone/vinyl acetate copolymer. The application also discloses procedures for making contact lenses, dental liners, and intrauterine devices from such polymeric material.