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“Don’t make me read, make me understand “
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Color Blindness
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Color Blindness
The normal human retina contains two kinds of light sensitive cells: the
rod cells (active only in low light) and the cone cells (active in normal
daylight and responsible for color perception).
Normally, there are three kinds of
cones (each one sensitive to a
specific range of wavelengths):
"red" cones (64%)
"green" cones (32%)
"blue" cones (2%)
The different kinds of inherited color blindness result from partial or
complete loss of function of one or more of the different cone systems.
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Different Types of Color Blindness
• Monochromacy: occurs when two or all three of the cone pigments are
missing and color and lightness vision is reduced to one dimension.
– Total color blindness
• Dichromacy: occurs when only one of the cone pigments is missing and
color is reduced to two dimensions.
– Partial color blindness
red-green
blue-yellow
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Total Color Blindness
Also known as rod monochromacy, complete achromatopsia, and
typical monochromacy.
A rare, non-progressive inability to distinguish any colors as a
result of absent or nonfunctioning retinal cones.
See everything as white, black, or some shade of gray
Typically caused by a missense mutation (a switched amino acid)
in the CNGB3 gene.
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Thanks
Submitted by
Rakesh
Shimla
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“Don’t make me read, make me understand “
www.makemegenius.com– Full of ingredients to make your child a genius.
Copyright of www.makemegenius.com, for more videos ,visit us.