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Most of us see our world in color. We enjoy looking at a lush green lawn or a red rose in full bloom. If you have a color vision defect, you may see these colors differently than most people.
There are three main kinds of color vision defects. Red-green color vision defects are the most common. This type occurs in men more than in women. The other major types are blue-yellow color vision defects and a complete absence of color vision.
Most of the time, color blindness is genetic. There is no treatment, but most people adjust and the condition doesn't limit their activities.
'''Color blindness''' 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 might also occur because of eye, nerve, or brain damage, or due to exposure to certain chemicals. The English chemist John Dalton in 1794 published the first science paper on the subject, "Extraordinary facts relating to the vision of colours", after the realization of his own color blindness; because of Dalton's work, the condition is sometimes called '''Daltonism''', although this term is now used for a type of color blindness called ''deuteranopia'' (see below). Color blindness is usually labeled as a disability; however, in select situations color blind people have advantages over people with a full color range. Color blind hunters are better at picking out prey against a confusing background, and the military have found that color blind soldiers can sometimes see through camouflage that fools everyone else. Monochromats may have a minor advantage in dark vision, but only in the first five minutes of dark adaptation [http://vision.psychol.cam.ac.uk/jdmollon/papers/hudibras.pdf]. Image:TestTriGamma165.png|frame|right|If you can't see this ... [ Read More ]
Color Blind - View concert photos, learn interesting John Mayer facts, browse the discography, or download audio or video.
Today's Window Fashions - Wood blinds retailer offering a wide variety of colors and styles.
Styling Shades - Offers a variety of mini blinds with scenes in a variety of colors, sizes, and designs.
Color Vision Store - Offers products on color blindness diagnosis and educational materials on color blindness.
Battery Indicator Light Solution for Color Blind Users - Offers solution for color red-green color deficient users to to read battery indicator light.
B/W Lines - Lines, also known as color balls for monochrome display or color blind people.
Corneal Asia Pacific Co Limited. - ChromaGen for color blindness and dyslexia.
WhatColor - A PC Tool For Colorblind People - Software designed for those people with partial or total color blindness. It identifies a color of the pixel on the screen of the PC. It tells not only RGB values, but also the name of the color of the point.
Colorblind Web Site Filter - View your actual web pages through the eyes of visitors with three different types of color blindness.
Vischeck - Allows the user to see the world as color blind people see it. Checks by images and urls.