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  2. Visual acuity - Wikipedia

    en.wikipedia.org/wiki/Visual_acuity

    [31] Most observers may have a binocular acuity superior to 6/6; the limit of acuity in the unaided human eye is around 6/3–6/2.4 (20/1020/8), although 6/3 was the highest score recorded in a study of some US professional athletes. [32]

  3. Visual impairment - Wikipedia

    en.wikipedia.org/wiki/Visual_impairment

    Worldwide for each blind person, an average of 3.4 people have low vision, with country and regional variation ranging from 2.4 to 5.5. [79] By age: Visual impairment is unequally distributed across age groups. More than 82% of all people who are blind are 50 years of age and older, although they represent only 19% of the world's population.

  4. Snellen chart - Wikipedia

    en.wikipedia.org/wiki/Snellen_chart

    The largest letter on an eye chart often represents an acuity of 6/60 (20/200), the value that is considered "legally blind" in the US. Many individuals with high myopia cannot read the large E without glasses, but can read the 6/6 (20/20) line or 6/4.5 (20/15) line with glasses. By contrast, legally blind individuals have a visual acuity of 6/ ...

  5. Peripheral vision - Wikipedia

    en.wikipedia.org/wiki/Peripheral_vision

    In terms of visual acuity, "foveal vision" may be defined as vision using the part of the retina in which a visual acuity of at least 20/20 (6/6 metric or 0.0 LogMAR; internationally 1.0) is attained. This corresponds to using the foveal avascular zone (FAZ) with a diameter of 0.5 mm representing 1.5° of the visual field (although often ...

  6. A new surgery can give legally blind people 20/20 vision - AOL

    www.aol.com/news/2016-12-15-a-new-surgery-can...

    A new surgery can give legally blind people 20/20 vision. Rachel Reeves. Updated December 15, ... almost all patients went from having an average of 20/1290 vision to 20/20 vision! Even more ...

  7. Eye problems but 20/20 vision? Zeeland practice aims to ... - AOL

    www.aol.com/eye-problems-20-20-vision-085707680.html

    The practice opened five years ago. For premium support please call: 800-290-4726 more ways to reach us

  8. Visual perception - Wikipedia

    en.wikipedia.org/wiki/Visual_perception

    This is different from visual acuity, which refers to how clearly a person sees (for example "20/20 vision"). A person can have problems with visual perceptual processing even if they have 20/20 vision. The resulting perception is also known as vision, sight, or eyesight (adjectives visual, optical, and ocular, respectively).

  9. Near visual acuity - Wikipedia

    en.wikipedia.org/wiki/Near_visual_acuity

    Near visual acuity or near vision is a measure of how clearly a person can see nearby small objects or letters.Visual acuity in general usually refers clarity of distance vision, and is measured using eye charts like Snellen chart, LogMAR chart etc. Near vision is usually measured and recorded using a printed hand-held card containing different sized paragraphs, words, letters or symbols.