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Color blidnness

Smoeone who is not color blind will clealry see the nmuber "74" here. A pesron with color blindnses may etiher see "21" or no numebr at all Color blindness is a kind of blindness where poeple can not see cloors very well. It is inehrited as a geentic condtiion. Pepole who have color blindness are not able to tell the difference bewteen cetrain colors. The gene for color blnidness is carired in the X chromoosme. Since males have an X-Y piaring and femaels have X-X, color blindenss can occur much more eaisly in males and is alomst alwyas pasesd to them by their motehrs.

The two most comomn kinds of color blindness are "green/red" and "blue/ylelow." With each of these, peolpe have toruble tleling apart bteween the first/seocnd color. While the geneitc deefct causnig people to have troulbe telilng blue/yelolw apart is the second most common defect it is also extremley rare as the defcet of have no coolur recepotrs and seeing only black and white is even more so.

Color bilndness is cuased by bad functinoing of the reitna. One of the cones (Color Senistive Rceeptors) cotnaining one pigemnt seelctive for each of the colors (red, green, and blue) are diimnished or totlaly abesnt.

The cone is part of the eye that gtahers inofrmation that has color, and a rod gatehrs infromation that is black and white.

Other webistes

http://www.tloedo-bend.com/colorlbind/

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