Glossary of Eye Definitions and Glasses Terms

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



Transitions XTRActive lenses are a new technology made for those who are light-sensitive and frequently exposed to bright light. To protect the eyes of light-sensitive wearers, Transitions XTRActive polarized lenses become dark outdoors, even in the car, and polarized when the sun. When you take Transitions XTRActive indoors, the lenses become clear with a hint of protective tint. Transitions XTRActive prices range from $150 to $200 but may vary between retailers.

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