To obtain a contact lens having good fitting feeling and without lowering the wettability even when the lens is used for a long time by graft- polymerizing a specified hydrophilic compd. to the surface of the lens for eyes by using water-soluble peroxide as a catalyst.
A lens for eyes is immersed in a hydrophilic compd. soln. containing water-soluble peroxide to carry out graft polymn. As for a hydrophilic graft monomer, polyethyleneglycol mono(meth)acrylate, polypropylenglycol mono(meth)acrylate or glycerol mono(meth)acrylate are used. An 0.01 to 90 wt.% aq. soln. of these hydrophilic graft monomers is prepared and the lens for eyes is immersed in the aq. soln. to carry out graft polymn. At the time of the graft polymn., water-soluble peroxide is used as a graft polymn. initiator. As for the water-soluble peroxide to be used as a concrete example, ammonium persulfate, potassium persulfate, sodium persulfate and peroxy-potassium sulfate can be used.
SAKURAI JUNKO
UNO KENJI
