BabelNet

bn:00000080n

Noun Concept

Categories: Medical signs, Optometry, Ophthalmology, Visual perception

twenty-twenty 20/20

Normal visual acuity, as measured by the ability to read charts at a distance of 20 feet WordNet 3.0

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Normal visual acuity, as measured by the ability to read charts at a distance of 20 feet WordNet 3.0 & Open English WordNet

IS A

WordNet 3.0 & Open English WordNet

twenty-twenty, 20/20

Wikipedia Redirections

20/20