| abstract |
(57) [Summary] [Object] An object of the present invention is to provide an ophthalmic lens material having high oxygen permeability, excellent impact resistance, and excellent transparency. [Structure] A polysiloxane macromonomer having three polymerizable groups, containing a urethane bond at the end and in the segment, and having a shape in which the molecule extends radially in three directions, and can be copolymerized therewith It is composed of a copolymer with a monomer having an unsaturated double bond. |