Patent ID: 7763693

Claim:
A curable composition consisting of: (1) 0.1 to 20 parts by weight of a silicon compound having a silanol group or a functional group capable of forming a silanol group upon hydrolysis and no radically polymerizable group, (2) 100 parts by weight of a radically polymerizable monomer having a polymerizable group selected from the group consisting of (meth)acryloyl group, (meth)acryloyloxy group, (meth)acryloylamino group, (meth)acryloylthio group, vinyl group, allyl group and styryl group, (3) 0.01 to 20 parts by weight of a photochromic compound, and (4) at least one optional component selected from the group consisting of a radical polymerization initiator, a curing catalyst for the silicon compound, a surfactant, an antioxidant, a radical scavenger, an ultraviolet light stabilizer, an ultraviolet light absorber, a release agent, a color protection agent, an antistatic agent, a fluorescent dye, a dye, a pigment, a perfume and a plasticizer, wherein the radically polymerizable monomer includes a radically polymerizable monomer having an epoxy group in the molecule.