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A reference value above which visual acuity is considered normal is called 6/6 vision, the USC equivalent of which is 20/20 vision: At 6 metres or 20 feet, a human eye with that performance is able to separate contours that are approximately 1.75 mm apart. [9] Vision of 6/12 corresponds to lower performance, while vision of 6/3 to better ...
Snellen chart is used to estimate visual acuity (last three rows are 20/15, 20/13 and 20/10) A Snellen chart is an eye chart that can be used to measure visual acuity . Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula developed by his professor ...
Vision (unaided) VA Visual acuity VA Dcc - VA Dsc Visual acuity with Distant chart with correctors Visual acuity with eye chart at Distant 20 feet (6 m) and with (cc: Latin cum correctore) correctors (spectacles); Dsc is without (sc: Latin sine correctore) correctors. See Visual_acuity#Legal_definitions: VA Nsc - VA Ncc
In the term "20/20 vision" the numerator refers to the distance in feet from which a person can reliably distinguish a pair of objects. The denominator is the distance from which an 'average' person would be able to distinguish —the distance at which their separation angle is 1 arc minute .
Myopia, or nearsightedness, is a vision condition where close objects look clear but far objects look blurry. This occurs when the shape of the eye causes light rays to bend and focus in front of ...
Visual acuity drastically decreasing (two levels or more), e.g.: 20/20 to 20/80 [11] Blurred vision: Those with nonexudative (dry) macular degeneration may be asymptomatic or notice a gradual loss of central vision, whereas those with exudative (wet) macular degeneration often notice a rapid onset of vision loss (often caused by leakage and ...
Even With 20/20 Vision, I Wear These Glasses Every Day. Trishna Rikhy. June 21, 2023 at 8:00 AM. Even With 20/20, I Wear These Glasses Every Day JOE LINGEMAN
Also, 20/20 vision already redirects to visual acuity, so I think 20/20 on its own should od the same. 91.125.182.19 00:12, 2 March 2011 (UTC) Support but make 20/20 a disambiguation page: I can imagine it's an extremely common typo for Twenty20 (a highly-viewed article) as well. 86.6.193.43 02:57, 4 March 2011 (UTC)
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