sharp-sightedness

Noun
  1. Sharpness of vision;
    The visual ability to resolve fine detail (usually measured by a Snellen chart) (synset 105663412)
    is a type of: sight, vision, visual modality, visual sense - the ability to see; the visual faculty
    subtypes:
    • 20/20, twenty-twenty - normal visual acuity, as measured by the ability to read charts at a distance of 20 feet
    • oxyopia - unusually acute vision
    same as: acuity, visual acuity
  2. Lively attentiveness (synset 104671985)
    is a type of: attentiveness - the trait of being observant and paying attention
    same as: alertness, on the qui vive

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