there are 1000005000 kinds of blindnesses
Look at rainbows
Color blindness is most often a genetic disorder, but it can be acquired due to illness, eye/brain/nerve damage, or chemicals. People with this condition tend to see a limited range of colors; a rare...
night blindness is when some ones eyes are so weak, they cant see in the dark
Depends .. If the subject is blind from birth then He sees no color because he knows none
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How the Color Blindness Gene Is Transferred
Color Blindness and Vision
Learn about Color Blindness