Definition of twenty-twenty in English:

twenty-twenty

Syllabification: twen·ty-twen·ty
(also 20/20)

adjective

  • Denoting vision of normal sharpness.
    More example sentences
    • ‘I took you to the optometrist and she said that you had perfect twenty-twenty vision… I don't understand machines these days… ‘she mumbled to herself and walked back out.’
    • They slowly faded into the lenses, leaving only crystalline images, better than twenty-twenty vision.
    • For example we could make sure they had something as simple as twenty-twenty vision, or something as complicated as great strength.

Origin

the Snellen fraction for normal visual acuity (see Snellen test).

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