METHOD OF CREATING A VISIBLE MARK ON LENS USING A LEUCO DYE

摘要

The present invention relates to a method for manufacturing a contact lens having a visible mark including the steps of (i) curing a hydrogel having reactive components including a leuco dye and a silicone component to form the contact lens and (ii) activating the leuco dye in at least a portion of said contact lens to change the color of the leuco dye to create the visible mark; wherein the leuco dye contains at least one methacrylate, acrylate, or styrene functional group, and the leuco dye polymerizes with the silicone component during the curing step.