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Dr Shinobu Ishihara introduced in 1917 the most well known color blindness test. Each of his tests consists of a set of colored dotted plates, showing either a number or a path. Since then this is the most widely used color vision deficiency test and still used by most optometrists and ophthalmologists.

Color vision deficiency seems to occur in about 8% to 12% of males of European origin and about 0.5% of females. Total CVD (seeing in only shades of gray) is extremely rare. Another rare form of CVD called unilateral dichromacy affects people who have one normal eye and one colorblind eye. There is no treatment for color vision deficiency, nor is it usually the cause of any significant disability. Most color deficient persons compensate well for their defect. At one time the U.S. In fact, a reduction in color signals makes the differences in texture and brightness more apparent.

This is the most famous test. It is known, that even people with normal color vision sometimes struggle with this test. This is not the full test, but just a few picked.

Take a look below to see how you are doing: