Provided is a silicone contact lens having surface hydrophilicity and surface lubricity. The silicone contact lens includes, on its surface, a graft polymer chain derived from a branched polyoxyethylene compound represented by the formula (1): ##STR00001##
where n represents from 3 to 1,150, a represents 0 or 2, and R.sup.1 represents a hydrogen atom or a methyl group.

The invention provides a production method of a polymer compound having a constitutional unit represented by the formula (3-1) and a constitutional unit represented by the formula (3-2), which contains a step of reacting a compound represented by the formula (1) and a compound represented by the formula (2) in the presence of a transition metal complex, a base and an organic solvent having a peroxide amount of 15 ppm by weight or less: ##STR00001## wherein Ar.sup.1 and Ar.sup.2 represent a divalent aromatic hydrocarbon group, a divalent heteroaromatic group, a group represented by the formula (4) or the like; X.sup.1 represents a bromine atom or the like; X.sup.2 represents B(OH).sub.2, a borane residue, a borate ester residue or the like; ##STR00002## wherein Ar represents a divalent aromatic hydrocarbon group, a divalent heteroaromatic group or the like, Ar represents an aryl group or a monovalent heteroaromatic group, m represents an integer of 0-2.

The invention provides a production method of a polymer compound having a constitutional unit represented by the formula (3-1) and a constitutional unit represented by the formula (3-2), which contains a step of reacting a compound represented by the formula (1) and a compound represented by the formula (2) in the presence of a transition metal complex, a base and an organic solvent having a peroxide amount of 15 ppm by weight or less:

##STR00001## wherein Ar.sup.1 and Ar.sup.2 represent a divalent aromatic hydrocarbon group, a divalent heteroaromatic group, a group represented by the formula (4) or the like; X.sup.1 represents a bromine atom or the like; X.sup.2 represents B(OH).sub.2, a borane residue, a borate ester residue or the like;

##STR00002## wherein Ar represents a divalent aromatic hydrocarbon group, a divalent heteroaromatic group or the like, Ar represents an aryl group or a monovalent heteroaromatic group, m represents an integer of 0-2.

Provided is a silicone contact lens having surface hydrophilicity and surface lubricity. The silicone contact lens includes, on its surface, a graft polymer chain derived from a branched polyoxyethylene compound represented by the formula (1):

##STR00001##

where n represents from 3 to 1,150, a represents 0 or 2, and R.sup.1 represents a hydrogen atom or a methyl group.