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English definition of “twenty-twenty vision”

twenty-twenty vision

noun [U] uk   /ˌtwen.tiˌtwen.tiˈvɪʒ.ən/ us    /-t̬iˌtwen.t̬i-/ (also 20/20 vision)
perfect sight, especially as measured by a standard test: The optician told me I had twenty-twenty vision.Eyesight, glasses and lensesUsing the eyesThe eye and surrounding areaOptics, microscopy and lasers
(Definition of twenty-twenty vision from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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