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  2. Ishihara test - Wikipedia

    en.wikipedia.org/wiki/Ishihara_Test

    The Ishihara test is a color vision test for detection of red–green color deficiencies. It was named after its designer, Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917. [2] The test consists of a number of Ishihara plates, which are a type of pseudoisochromatic plate.

  3. Color vision test - Wikipedia

    en.wikipedia.org/wiki/Color_vision_test

    An Ishihara test image as seen by subjects with normal color vision and by those with a variety of color deficiencies. A pseudoisochromatic plate (from Greek pseudo, meaning "false", iso, meaning "same" and chromo, meaning "color"), often abbreviated as PIP, is a style of standard exemplified by the Ishihara test, generally used for screening of color vision defects.

  4. Holmgren's wool test - Wikipedia

    en.wikipedia.org/wiki/Holmgren's_wool_test

    In Holmgren's wool test, the patient is asked to match coloured skeins of yarn to the samples in the box. [6] [7] At first, the patient is asked to select from the 40 skeins, 10 skeins that best match the light green master A. [2] From the remaining 30 skeins, the patient is then asked to select the 5 skeins that best match the red master C. [2] Lastly, the patient is asked to select 5 skeins ...

  5. Color blindness - Wikipedia

    en.wikipedia.org/wiki/Color_blindness

    In June 2020, India relaxed its ban on driver's licenses for the color blind to now only apply to those with strong CVD. While previously restricted, those who test as mild or moderate can now pass the medical requirements. [96] Australia instituted a tiered ban on the color blind from obtaining commercial driver's licenses in 1994.

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  7. Congenital red–green color blindness - Wikipedia

    en.wikipedia.org/wiki/Congenital_red–green...

    A red–green color blind subject will have decreased (or no) color discrimination along the red–green axis. This commonly includes the following colors of confusion: [citation needed] Cyan and gray; Rose-pink and gray; Blue and purple; Yellow and neon green; Red, green, orange, brown; Black and red (protans)

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  9. Farnsworth–Munsell 100 hue test - Wikipedia

    en.wikipedia.org/wiki/Farnsworth–Munsell_100...

    The Farnsworth–Munsell 100 Hue Color Vision test is a color vision test often used to test for color blindness.The system was developed by Dean Farnsworth in the 1940s and it tests the ability to isolate and arrange minute differences in various color targets with constant value and chroma that cover all the visual hues described by the Munsell color system. [1]