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  2. Snellen chart - Wikipedia

    en.wikipedia.org/wiki/Snellen_chart

    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 ...

  3. MNREAD acuity chart - Wikipedia

    en.wikipedia.org/wiki/MNREAD_acuity_chart

    The MNREAD acuity chart or Minnesota low vision reading chart is a text based chart used to measure near visual acuity in people with normal or low vision. [1] It can also be used to measure maximum reading speed, critical print size and the reading accessibility index of a person. [2] Digital and printed types of charts are available. [3]

  4. Eye chart - Wikipedia

    en.wikipedia.org/wiki/Eye_chart

    For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision, while the ETDRS chart is designed for use at 4 meters. [16] There is often also a need to test a subject's vision at near or occupational tasks (such as reading or computer use).

  5. Landolt C - Wikipedia

    en.wikipedia.org/wiki/Landolt_C

    Landolt C optotypes in various sizes and orientations Golovin–Sivtsev table. The Landolt C, also known as a Landolt ring, Landolt broken ring, or Japanese vision test, is an optotype: a standardized symbol used for testing vision.

  6. Humphrey visual field analyser - Wikipedia

    en.wikipedia.org/wiki/Humphrey_Visual_Field_Analyser

    For example, P <2% means that less than 2% of the population have vision loss worse than measured [19] Pattern standard deviation (PSD): Derived from the pattern deviation and thus highlights focal loss only. A high PSD, indicating irregular vision, is therefore a more useful indicator of glaucomatous progression, than the MD [3]

  7. Even With 20/20 Vision, I Wear These Glasses Every Day - AOL

    www.aol.com/lifestyle/even-20-20-vision-wear...

    Even With 20/20, I Wear These Glasses Every Day JOE LINGEMAN "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Shop Now $130 caddislife.com

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