Posts Tagged ‘color blindness’
Ishihara Color Blind Test
Ishihara test is color blind test developed by Drs. Shinobu Ishihara. This test was first published in 1917 in Japan. Since then, these tests continue to be used throughout the world, until now.
Ishihara color blindness test consists of a sheet in which there are points with different colors and sizes. Colored points are arranged to form a circle. Color point was made so that the color blind people will not see the color differences are seen as normal people (pseudo-isochromaticism).
In normal people, in the circle would seem certain numbers or lines. But the color-blind people, who appeared on the circle will be different as seen by normal people.
Ishihara test is usually completed by an answer key for each share. The test results will be compared with one answer key. From here can be determined whether a person is normal or color blindness.
This test is usually done at the time we take care of able-bodied certificate.
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The Facts About Color Blindness
1. Color blindness is more common in one sex than men women. As many as 99% of a color-blind can not distinguish between green and red colors. Also found cases of patients who can not recognize the difference between red and green colors.
2. This eye defect is a genetic disorder inherited by the father or mother.
3. Has not been established regarding the number of patients, but a study says 8 -12% of European men are suffering from color blindness. While the percentage of European women of color blindness is 0.5 -1%. The level of color blindness in the other continents of course vary.
4. There is no way to treat color blindness, because he was not a disease but the visually impaired. It could be a color blind man would feel tortured by this state. Some companies set a requirement that workers should not color blind.
5. To determine whether a person suffering from color blindness, carried out tests using called Ishihara plates.
6. Laypeople often assume the physically color blind could only see black and white, like watching a silent movie in black and white. This assumption is wrong.
7. The bull was color blind. The impression generated red jump lead to the animal emotions, not by the color red itself.
8. In World War II, color blind soldiers sent to perform a particular mission. Their inability to see converted to green camouflage detect the opponent does.
9. Famous artists such as color blindness is Mark Twain, Paul Newman, Meat Loaf, Bing Cosby, Bob Dole.
10. Every person born color blind when first born.
11. Emerson Moser, senior crayon maker, admitted that he was blind green-blue color and not able to see color as a whole.
12. People with color blindness is always haunted by the question “is this color?”