Glossary of Eye Definitions and Glasses Terms

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


Add power glasses

What does ADD mean on eye prescriptions? The ADD eye prescription value refers to the additional lens power required to help your eyes focus for reading. For people with presbyopia or who require vision correction at multiple distances, your eye care provider will apply to ADD prescription to glasses used for reading or bifocal and progressive lenses. ADD power glasses prescriptions usually fall between +0.5 and +3.5.

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