Abstract: Provided is an optical lens formed by integrally molding a lens part that is an optically effective portion and has a light incidence/emission surface, and a lens edge part that is an optically ineffective portion and has a surface thereof except the light incidence/emission surface. The lens edge part includes a non-transparent region in part or all thereof, the lens part and the lens edge part include a thermoplastic resin, and the non-transparent region in the lens edge part contains a total of 0.1-5 mass % of one or more of a black dye and a black pigment.

Abstract: A detergent for a contact lens comprising 40 to 80% by weight of fine particles of a water-soluble compound which has a salt value of at most 0.65 and a solubility in water of 3 to 30 at 30.degree. C. and at most 40 at 60.degree. C., with the product of the salt value and the solubility at 30.degree. C. being at most 10, and 100% of which passes a JIS standard sieve of a nominal size of 75 .mu.m, and 60 to 20% by weight of a pasting agent containing as a major component an aqueous dispersion of a gel composed of an acrylic acid compound having a recurring unit represented by the general formula (I): ##STR1## wherein R.sub.1 represents hydrogen atom and/or methyl group, R.sub.2 represents at least one member selected from hydrogen atom, sodium atom, potassium atom, lithium atom, NH.sub.