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Colored lenses are called the tinted lenses and it is also called sun lenses. The lens actually absorbs the tint color into the lens material. Tint density is defined as a percentage, where 0% is completely clear, and 100% permits no light to pass through (solid). A 10% to 20% tint is used for a “fashion” tint, and a 50% to 80% tint is used for outdoor protection from the sun.
