Patent ID: 7044598

Claim:
An ophthalmic lens comprising a polymer and a rhodamine derivative in its discolored state, in which the polymer is obtained by a polymerization of a polymerizable composition of monomers, which contains an alkyl (meth)acrylate as an essential component thereof, and the polymerization of the polymerizable composition of monomers is carried out while the rhodamine derivative is contained in the composition, wherein the rhodamine derivative in the polymer is capable of developing a color by an irradiation of a light, and wherein said rhodamine derivative is a compound represented by the following formula (I), wherein each of X and Y is independently selected from the group consisting of NH 2 , NHMe, NHEt, NMe 2 and NEt 2 ; Z is selected from the group consisting of H, CH 2 ═C(CH 3 )COO—, CH 2 ═C(CH 3 )COO(CH 2 )n—, and CH 2 ═C(CH 3 )COO(CH 2 )n—O—; and n represents an integer of 1–6.