Contact lens having a smooth surface layer of a hydrophilic polymer

摘要: A contact lens comprising a silicone polymer or copolymer core and hydrophilic surface grafted to the is formed by contacting with free radical polymerizable precursor in liquid state subjecting high dose of ionizing radiation for short period. The dose, time temperature are controlled produce an optically clear forming smooth silicone, preventing substantial migration into localized concentration on surface.