Color blindness, or color vision deficiency, in humans is the inability to perceive differences between some or all colors that other people can distinguish. It is most often of genetic nature, but may also occur because of eye, nerve, or brain damage, or due to exposure to certain chemicals.
Color blindness is usually classed as disability; however, in selected situations color blind people may have advantages over people with normal color vision.
The most frequent forms of human color blindness result from problems with either the middle or long wavelength sensitive cone systems, and involve difficulties in discriminating reds, yellows, and greens from one another. They are collectively referred to as "red-green color blindness", though the term is an over-simplification and somewhat misleading. Other forms of color blindness are much more rare. They include problems in discriminating blues from yellows, and the rarest forms of all, complete color blindness or monochromacy, where one cannot distinguish any color from grey, as in a black-and-white movie or photograph.
2007-02-13 01:31:57
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answer #1
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answered by Mr L 2
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unable to dfifferantiate between colors. eg. Blue Green colorblindness. it is genetic. Tests for color blindness - Ishihara charts. Charts representing diagrams made up of diff color circles and u need to identify the figure. Tests are carried out by certain liscensing authorities like for Driving liscence where a color blind person cannot differantiate between light signals.
2007-02-13 02:05:52
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answer #2
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answered by Arch 2
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individuals with colorblindness are not able to differentiate between different colors.
2007-02-13 01:21:20
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answer #3
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answered by salam 2
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A color blind person is unable to differentiate between colors as he lacks cone cells which are present in the eyes.
2007-02-13 01:20:06
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answer #4
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answered by Chigorin 2
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