Twenty-twenty
Of sharp-sightedness. May also be referred to as 20/20.
Normal visual acuity, as measured by the ability to read charts at a distance of 20 feet.
This concept's ID is @1~30800
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Of sharp-sightedness. May also be referred to as 20/20.
Normal visual acuity, as measured by the ability to read charts at a distance of 20 feet.
This concept's ID is @1~30800