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Snellen Chart

Snellen eye chart

Adapted from the National Eye Institute, U.S. National Institutes of Health. Available online: http://www.nei.nih.gov

A Snellen chart is used to test far vision. It has several rows of letters. The letters on the top line are the largest; those on the bottom line are the smallest. You stand 20 ft (6 m) from the chart, cover one eye, and read the smallest row of letters you can see on the chart.

Current as of: January 24, 2022

Author: Healthwise Staff
Medical Review:
Kathleen Romito MD - Family Medicine
Anne C. Poinier MD - Internal Medicine
Adam Husney MD - Family Medicine
Christopher J. Rudnisky MD, MPH, FRCSC - Ophthalmology

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