Oct 12, 2021 · The Snellen eye chart is the most common method used by eye doctors to measure visual acuity, which is how clearly a person can see. During an eye exam, patients …

ottom. Providers can display the Snellen chart with a projector or digital screen, allowing for letter alteration and line-by-line presentation to prevent memorization of letters and lines. The row of …

Jan 20, 2025 · The visual acuity test is used to determine the smallest letters you can read on a standardized chart (Snellen chart) or a card held 20 feet (6 meters) away. Special charts are …

If the patient can’t read the largest letter on the chart, stand in front of the chart and move your hand side to side and ask the patient if they can see your hand moving.

In the most familiar acuity test, a Snellen chart is placed at a standard distance: 6 metres. At this distance, the symbols on the line representing "normal" acuity subtend an angle of five …

Apr 7, 2025 · To perform the Snellen Eye Test, the person being tested should stand 20 feet (or 6 meters) away from the Snellen Chart in a well-lit room. If testing for a child or someone who …

Home use of this Snellen eye chart will help you determine the clarity of your distance vision. This can be useful to screen children for nearsightedness, which causes blurry distance vision.

Distance values for normal eyesight are marked in both U.S. Customary and metric units on the right side. On the left side are corresponding visual acuity numbers commonly used in …

Aug 13, 2025 · The test distance is usually 20 feet (6 meters), because at this distance light rays entering the eye are nearly parallel, minimizing the need for accommodation.

Oct 28, 2025 · The Snellen eye chart measures how well you can see without glasses from 20 feet away. Your vision result, like 20/20, shows how much you can see compared to normal …