Patent ID: 9028064
Filing Date: 2015-05-12
Classification: B29D,G02C,Y10T

Abstract:
1. A method of fabricating a lens comprising: (a) forming a lens from a material of relatively open molecular structure; (b) first, tinting the lens to a desired corrective color with an ophthalmic dye, wherein the ophthalmic dye is heated to obtain a heated ophthalmic dye and the lens is immersed in the heated ophthalmic dye so that the heated ophthalmic dye penetrates the lens molecular structure; and (c) second, dyeing the lens with a neutral dye that transmits about 60% or more of incident light across the visible spectrum, wherein the neutral dye is heated to obtain a heated neutral dye and the lens is immersed in the heated neutral dye so that the heated neutral dye penetrates the lens molecular structure, such that the neutral dye is concentrated primarily at surface regions adjacent exterior surfaces of the lens, and provides the lens with a neutral color appearance.