A person taking the test covers one eye from 6 metres or 20 feet away, and reads aloud the letters of each row, beginning at the top. The smallest row that can be read accurately indicates the visual …

If a patient reads the 20/200 line that means they can read at 20 feet the letters that people with "normal" vision can read at 200 feet. So at 20/200, your visual acuity is very poor.

Oct 11, 2021 · Download this printable Snellen chart to do your own vision screening. Just print the chart, hang it up on a wall, measure the proper distance from it and start reading.

Visual acuity is your ability to see clearly and correctly. The Snellen eye test chart is the most common way providers test your vision during an eye exam.

Oct 28, 2025 · Snellen and other well-known eye charts are used to measure visual acuity, which refers to how well you can see without glasses or contacts. The results are used to determine if you need …

Apr 7, 2025 · The Snellen Test is a widely used eye test that measures visual acuity, which is the sharpness or clarity of vision. This test is often conducted by optometrists and ophthalmologists to …

Mar 22, 2025 · A Snellen test uses a chart with different sizes of letters or forms to evaluate your visual acuity — that is, the sharpness of your vision. The test shows how accurately you can see from a …

Feb 14, 2024 · Facts and history about the eye testing chart. The most commonly used eye chart is known as the Snellen chart. It usually shows 11 rows of capital letters.

Assess binocular and monocular visual acuity. This calculator is intended as a convenient screener for visual acuity to be used on a mobile device and should not be used as a replacement for in-office …

May 15, 2025 · Discover how the Snellen Eye Chart helps measure your visual acuity. Learn what those letters mean and why regular eye tests are essential.