Invention Grant
US07931369B2 Tinted lens and method of making same 有权
有色透镜及其制作方法

Tinted lens and method of making same
Abstract:
A lens and a method of making lenses suitable for color blindness correction are disclosed. The corrective lens may be formed of an optically transparent base material, which is tinted to the desired color for correction by immersion in a colorant dye. The color tinted lens is then tinted by a neutral tint dye to render the lens observable as a regular corrective lens. If desired, the dyes may be heated during immersion.
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