Glossary of Eye Definitions and Glasses Terms

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


Visual Acuity

Visual acuity, meaning the eye’s ability to distinguish details at a standard distance, is measured through a visual acuity test often used to diagnose common refractive errors and detect changes in vision over time. In an eye acuity test, the patient is asked to read lines from a chart at a distance covering one eye at a time to assess their refractive error for a more precise diagnosis.

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