Patent ID: 7368072

Claim:
A method for producing a contact lens comprising a photochromic pupillary region comprising: a) adding a volume of a first polymerizable monomer composition comprising a first viscosity and a photochromic amount of at least one photochromic material to a concave member of a casting mold comprising a concave member having a pupillary region and a convex member, said volume being sufficient to produce a photochromic pupillary region in an at least essentially cured contact lens; b) adding a volume of a second polymerizable monomer composition comprising a viscosity at least 300 centipoise less than said first polymerizable monomer composition to the concave member of the casting mold, the total volume of the first and second polymerizable monomer composition being sufficient to produce an at least essentially cured contact lens; c) affixing the convex member to the concave member of the casting mold; and d) at least essentially curing the polymerizable composition in the casting mold; wherein the extent of photochromic activity in the contact lens body is less than 50 percent of the lens body area.