Snellen Chart Definition

snĕlən
noun
A chart for testing visual acuity, usually consisting of letters, numbers, or pictures printed in lines of decreasing size that a patient identifies from a fixed distance.
American Heritage Medicine
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Origin of Snellen Chart

  • After Herman Snellen (1834–1908), Dutch ophthalmologist

    From American Heritage Dictionary of the English Language, 5th Edition

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Snellen chart