| abstract |
Contact lens of a hydrogel composition containing a physiologically acceptable aqueous solution and water-insoluble but water-swellable polymer composition from a polymerizable mixture containing: n (1) polymerizable monoester of acrylic and/or methacrylic acid and polyhydric alcohol; n (2) an alkyl acrylate and/or alkyl methacrylate and/or vinyl ester; n (3) heterocyclic N-vinyl compound containing carbonyl functionality adjacent to nitrogen in the ring; n (4) divinyl benzene and/or divinyl toluene. |