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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.
The Ishihara color test is the test most often used to detect red–green deficiencies and most often recognized by the public. [1] Some tests are clinical in nature, designed to be fast, simple, and effective at identifying broad categories of color blindness. Others focus on precision and are generally available only in academic settings. [56]
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 .
An Ishihara test image as seen by subjects with normal color vision and by those with a variety of color deficiencies. The diagnosis of congenital red–green color blindness is usually inferred through psychophysical testing. These color vision tests test detect the color vision phenotype, and not the subject genotype, so are unable to ...
While the disability of color blindness is considered minor, the use of color in safety systems excludes the color blind from many occupations. Screening for color blindness in these occupations is accomplished with color vision tests, often the Ishihara test. There is no cure for color blindness, but management of color vision may be possible ...
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Ishihara colour test: A color perception test for red-green color deficiencies. 1917 Liver function test: Groups of blood tests that give information about the state of a patient's liver N/A Lumbar puncture: Cerebrospinal fluid (CSF) collection to confirm or exclude conditions 1891 Mantoux test: Tuberculosis screening tool. 1890 Pap smear
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