Glossary of Eye Definitions and Glasses Terms

Want to discover all things eyewear? Find out more about your eyeglasses and sunglasses, word by word.


Transition lenses

Transition lenses are “photo-sensitive” lenses that darken when exposed to UV light, such as sunlight, and return to their translucent state once they are no longer exposed to UV rays. Transition glasses promote eye health by shielding eyes from 100% of harmful UV rays and there several different transition lens colors that are available on the market. Transition prescription glasses are available in different lens designs, and transition lens cost can add an additional $100 - $400 to the overall price of the glasses.

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