A composition for an intraocular lens comprising, an organopolysiloxane (A) having a viscosity of 10,000 cp or below and comprising at least one unsaturated aliphatic group, an organopolysiloxane (B) comprising at least three hydrogenated silyl units and a platinum compound; wherein the platinum compound based on its platinum content constitutes 10-200 ppm by weight of the composition. The composition provides a homogeneous intraocular lens even when it is injected into a crystalline capsule through a slender tube such as an injection needle.