Monomer, polymer, and ocular lens and contact lens each obtained therefrom

摘要

A monomer as represented by general formula (a) or (a') below, with which a polymer having high oxygen permeability and transparency and suited to an ophthalmic lens is obtained, is provided. Suitable monomers have the formula: wherein A is a siloxanyl group; R¹ and R² are H or methyl groups; R³ is a substituted group that is selected from the group consisting of alkyl groups with 1 to 20 carbon atoms that may be substituted and aryl groups with 6 to 20 carbon atoms that may be substituted; m indicates an integer of 0 to 200.