Colour Blindness shows discontinuous variation . What does this mean?
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Color blindness is an often misunderstood condition. Many assume because of its name that “color blind” means a person can only see in black and white. In actuality, the vast majority of people with color blindness do see color, but they see a much narrower range of color. It is estimated that a person with normal color vision can see up to 1 million distinct shades of color, but a person who is color blind may see as few as just 10 thousand colors (1% of the normal range).
Images that simulate color blindness, like the ones in this blog, can give an impression to people with normal color vision what it might be like to see the world through the eyes of a color blind person, however these simulations actually fail to give a realistic understanding of the actual first person experience.
So, what are the actual effects of color blindness on vision? The primary symptom that color blind people experience is color confusion. Put simply, color confusion is when someone mistakenly identifies a color, for example calling something orange when it is actually green.
Some commonly confused colors include:
enchroma-gray.pngProtan
Color Blindnessenchroma-pink.pngNormal
Color Vision
enchroma-blue.pngProtan
Color Blindnessenchroma-purple.pngNormal
Color Vision
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Color Blindnessenchroma-green.pngNormal
Color Vision
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Color Blindnessenchroma-red.pngNormal
Color Vision
If we examine the above list of color confusions in more detail, we might notice there is a pattern: all of these colors contain some amount of either red or green in their shades. For example purple consists of blue combined with red, orange is a blend of red and yellow, pink is a blend of white and red, etc. This pattern is why color blindness is sometimes also called “red-green color blind” or “green deficient” or “red deficient”.
Color Blindness Definition
Color blindness is caused by a change or reduction of sensitivity of one or more of the light-sensitive cone cells in the eye. The human eye contains millions of cone cells which work together to translate light into neural signals that are transmitted along the optic nerve to the brain, resulting in the sensation of color vision. The most common type of color vision deficiency is called “red-green color blindness” which occurs when the green and red sensitive cone cells’ sensitivities overlap more than they are supposed to. Instead of seeing green and red as distinct colors, the person sees them as being very similar, thus the resulting color confusion and other frustrations
Explanation:
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