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or 20/20 (twĕn′tē-twĕn′tē, twŭn′tē-twŭn′tē)
Having normal visual acuity.

[From a method of testing vision by reading charts at a distance of 20 feet.]
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Noun1.20/20 - normal visual acuity, as measured by the ability to read charts at a distance of 20 feet
acuity, sharp-sightedness, visual acuity - sharpness of vision; the visual ability to resolve fine detail (usually measured by a Snellen chart)