Colourblind test

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four circles with different colors and sizes on the same circle, each containing various dots

The Ishihara color test is a test for color blindness. It was named after its designer, Dr. Shinobu Ishihara (1879-1963), a professor at the University of Tokyo, who first published his tests in 1917. It makes use of the peculiarity that in red-green blindness, blue and yellow appea

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the color chart for different colors in an image, with each one being colored by its own

Different types of colourblindness. About 9% of men and 0.5% of women are colourblind. The most common form is red-green colourblind (Protanopia) then blue-yellow colourblind (Tritanopia) and more rarely, people who see everything in shades of grey (Monochomacy). Strong tonal value contrast is important in data visualisation and visual imagery. For more information, go to Colourblind.org Follow @zena_oconnor and @the.colour.collective on Instagram

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an orange and yellow background with lots of small dots on the bottom half of it

The Ishihara color test is a test for color blindness. It was named after its designer, Dr. Shinobu Ishihara (1879-1963), a professor at the University of Tokyo, who first published his tests in 1917. It makes use of the peculiarity that in red-green blindness, blue and yellow appea

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