File:Ishihara colour blindness test, London, England, 1948 Wellcome L0058975.jpg
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editIshihara colour blindness test, London, England, 1948 | |||
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Ishihara colour blindness test, London, England, 1948 |
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Description |
Used to test for colour blindness, this test is named after its inventor, Shinobu Ishihara (1897–1963), a Japanese ophthalmologist. Each image is made up of a series of closely packed coloured dots and includes a number. The patient is asked to identify the number or image that they can see. By using the range of charts, the type of colour blindness a patient has can be identified. There are three types of colour blindness: daltonism – inability to distinguish reds from greens (the most common type); monochromatism –where all colours appear as shades of one colour; and total colour-blindness. Ishihara devised his test in 1917 and is still used today. publisher: H. K. Lewis & Company Limited Place made: London, Greater London, England, United Kingdom Wellcome Images |
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Source/Photographer |
https://wellcomeimages.org/indexplus/obf_images/2b/03/98b13461c74c9d886b8367aeb439.jpg
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Short title | L0058975 Ishihara colour blindness test, London, England, 1948 |
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Author | Wellcome Library, London |
Headline | L0058975 Ishihara colour blindness test, London, England, 1948 |
Copyright holder | Copyrighted work available under Creative Commons Attribution only licence CC BY 4.0 http://creativecommons.org/licenses/by/4.0/ |
Image title | L0058975 Ishihara colour blindness test, London, England, 1948
Credit: Science Museum, London. Wellcome Images images@wellcome.ac.uk http://wellcomeimages.org Used to test for colour blindness, this test is named after its inventor, Shinobu Ishihara (1897–1963), a Japanese ophthalmologist. Each image is made up of a series of closely packed coloured dots and includes a number. The patient is asked to identify the number or image that they can see. By using the range of charts, the type of colour blindness a patient has can be identified. There are three types of colour blindness: daltonism – inability to distinguish reds from greens (the most common type); monochromatism –where all colours appear as shades of one colour; and total colour-blindness. Ishihara devised his test in 1917 and is still used today. publisher: H. K. Lewis & Company Limited Place made: London, Greater London, England, United Kingdom made: 1948 Published: - Copyrighted work available under Creative Commons Attribution only licence CC BY 4.0 http://creativecommons.org/licenses/by/4.0/ |
IIM version | 2 |