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Snellen test |
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Snellen test [′snel·ən ‚test] (medicine) A test for visual acuity presenting letters, numbers, or letter E's in various positions, with the symbols varying in size; if the smallest are read at a distance of 20 feet (6 meters), vision is recorded as 20/20, or normal. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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They also perform the standardized Snellen test, during which the patient covers one eye at a time and identifies letters on a chart from 20 feet away. |
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