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A test for visual acuity using a Snellen chart.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
A test for visual acuity in which the patient reads a Snellen chart at a certain distance with one eye, then with the other eye, and then with both eyes.
See also: Snellen, Herman
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