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English: Ishihara Plate for testing on Deuteranopia. Edible with Ikscape the File offers many options for creation of other plates. It contains special Layers facilitating editing. Based on and . Colors chosen with support from Java-Program "Color Oracle"
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.
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.
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An Ishihara test image as seen by subjects with normal color vision and by those with a variety of color deficiencies. The main method for diagnosing a color vision deficiency is in testing the color vision directly. The Ishihara color test is the test most often used to detect red–green deficiencies and most often recognized by the public. [1]
For example, the Ishihara test and other Pseudoisochromatic plates require a direct comparison (and therefore discrimination) of foreground and background colors to be able to read the embedded number/character. Arrangement tests such as the Farnsworth D-15 also requires comparison of adjacent colors to be able to arrange them in a meaningful ...
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A plate from the Ishihara test. Color blindness (color vision deficiency) is the decreased ability to see color or differences in color. It can impair daily color tasks such as selecting ripe fruit or choosing clothing, as well as safety-related tasks such as interpreting traffic lights. While the disability of color blindness is considered ...
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