Patent ID: 6630083
Filing Date: 2003-10-07
Classification: B29C,B29D,B29K,B29L,G02B

Abstract:
A method for producing spectacle lenses comprising the steps of: a.) exposing to low intensity ultraviolet light a mold assembly comprising a mold half and an optical preform and a surface-forming effective amount of a resin comprising reactive groups, the low intensity WV light exposure carried out under conditions suitable to convert at least about 50 percent or more of the resin reactive groups; and b.) exposing, subsequently, the resin to high intensity UV light under conditions suitable to substantially complete through curing of the resin and lens formation, wherein the low intensity ultraviolet light is about 1 to about 5 mW/cm2 at about 300 to about 450 nm and the high intensity ultraviolet light is about 500 to about 1500 mW/cm2 at about 300 to about 450 nm.