Contact lens and process for preparing the same

Details Contact lens and process for preparing the same Contact lens and process for preparing the same

B - Operations, Transporting

29

D

18/106

B29D 11/00 (2006.01) C08F 8/12 (2006.01) C08J 7/12 (2006.01) G02B 1/04 (2006.01)

Patent

CA 1182614

Abstract of the Disclosure A water-absorptive contact lens is prepared by polymerizing a monomer mixture containing a monomer having a ketalized glycitol and a hydrophilic monomer and/or a hydrophobic monomer, and after forming the resulting copolymer into a contact lens, if necessary, treating the copolymer having a shape of contact lens with an acid to convert the ketal groups into hydroxyl groups. The contact lens has excellent oxygen permeability and affinity for the eye and can be worn continuously for a long period of time.

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