Patent ID: 6649722
Filing Date: 2003-11-18
Classification: C08F,G02B,Y10S

Abstract:
An ophthalmic lens comprising a polymeric material that has an oxygen permeability of about 45 to about 150 Dk units and a hydrated water content of about 20 to about 55 weight percent, the polymeric material being comprised of a co-polymer of:(a) a hydrophilic monomer; (b) a hydrophobic aromatic or aliphatic monomer or a mixture thereof in an amount effective to provide said copolymer with an increased oxygen permeability; (c) a tris(siloxy)silyl group-containing monomer; (d) a fluorinated monomer containing about 3 to about 20 fluorine atoms and 4 to about 20 carbon atoms per monomer molecule, in an amount effective to provide said copolymer with an increased water content at equilibrium hydration; and (e) an amount of cross-linker sufficient to provide a stress at break value of about 0.003 to about 30 N/mm2, elongation at break of about 25 to about 3000 percent and a modulus value of about 0.001 to about 10 N/mm2.