An ocular lens material comprising a copolymer prepared by polymerization with
heating of a monomer mixture and/or with irradiating a monomer mixture with ultraviolet
ray by means of a molding method, the monomer mixture containing a polysiloxane
macromonomer A, a Si-containing alkyl methacrylate B, a hydrophilic monomer C comprising
NVP as C-1 and another hydrophilic monomer C-2, another monomer D and a crosslinkable
monomer E comprising a crosslinkable monomer E-1 containing at least one group
selected from acryloyl group, vinyl group and allyl group, and methacryloyl group,
and a crosslinkable monomer E-2 containing at least two methacryloyl groups as
main components, wherein (A+B)/C (weight ratio) is 30/70 to 70/30, A/B is 25/75
to 75/25, C-1/C-2 is 50/50 to 100/0, the amount of D is 0 to 20% by weight in the
monomer mixture, which has high oxygen permeability, high mechanical strength,
excellent surface wettability and low surface frictional property.