Snellen test

noun

Medical Definition of Snellen test

: a test for visual acuity presenting letters of graduated sizes to determine the smallest size that can be read at a standard distance

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“Snellen test.” The Merriam-Webster.com Medical Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/medical/Snellen%20test. Accessed 21 January 2020.

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