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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.
Eight Ishihara charts for testing colour blindness, Europe, 1917-1959 Colour blindness is tested using these eight placards. They are known as Ishihara charts. They are named after their inventor, Japanese ophthalmologist Shinobu Ishihara (1897–1963). Each image consists of closely packed coloured dots and a number.
In the full 38 plate test it is found as plate 29, often rotated 180 degrees from what is shown. Gsuberland ( talk ) 13:06, 29 June 2021 (UTC) [ reply ] This appears to be the only plate referred to by this article that uses the 24 plate numbering, so I've changed it to say 29 and added a note about numbering discrepancies.
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"
Shinobu Ishihara (石原 忍, Ishihara Shinobu, September 25, 1879 – January 3, 1963) was a Japanese ophthalmologist who created the Ishihara color test to detect colour blindness. He was an army surgeon .
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