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What is a discoloration lens
Sep 11, 2017

Others are also called "photosensitive lenses". Because of the addition of silver halide chemicals in the lens, so that the original transparent colorless lenses, when exposed to strong light, will become colored lenses, to do protection, so is suitable for indoor and outdoor use at the same time.

Wearing glasses was once a symbol of wisdom and culture. Because modern society's television, computer and other inventions to protect the eyes from the potential threat, wearing glasses more and more people.

People who wear glasses are often jokingly called four eyes, which is a kind of impolite and disrespectful to those who wear glasses. In addition, the eyes of people who wear glasses often protrude outward.

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