twenty-twenty
English Thesaurus
1. normal visual acuity, as measured by the ability to read charts at a distance of 20 feet (noun.cognition)
hypernym | : | acuity, sharp-sightedness, visual acuity, |
definition | : | sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart) (noun.cognition) |
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