Glossary of Eye Definitions and Glasses Terms

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


Bifocal Lenses

Bifocal lenses are eyeglasses that provide two different lens powers, correcting vision at both long and short distances. Bifocals are commonly used to help the eye adjust vision to focus on objects that are close once it begins to lose the ability to transition focus due to age-related conditions like presbyopia. Bifocal glasses are all typically designed in the same way, with a small portion of the bottom of the lenses crafted for short-distance vision correction.

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