Urdu Meanings, Pronounciation and Synonyms:
20 by 20
(Pronunciation -تلفظ سنیۓ )
US: 
Slow
Normal
Noun: 20 by 20
| 1. 20 by 20 [ Synonyms: twenty-twenty] | |
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Normal visual acuity, as measured by the ability to read charts at a distance of 20 feet
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