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Color Blindness
Allows the user to see the world as color blind people see it. Checks by images and urls.
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Daltonize: For the color blind visitor the most amazing results may be the most mundane. I never before knew why people made such a big deal out of auroras and rainbows.
images for colorblind viewers.
How do babies see the world? Visit
Other sites worth visiting:
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Short facts on condition. Links to self-diagnostic test.
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Colorblind Facts and Selftest
Below is some quick facts about colorblindness. After you are done reading these facts make sure you take the "
Most colour impaired can see all colors. Very few color blind people can only see in black in white (less than 1%).
Color blindness is the inability to
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Pictures to approximate what the patient sees. Article about color problems, causes, and compensation with web design or browser settings.
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Color Vision, Color Deficiency
The subject of color usage on the web comes up once in a while, so I thought it might be useful to pull together some basic issues for people who might be interested in color. It is not a discussion of when and whether it is appropriate to use color at all, or of
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Includes chart, tables, and pictures.
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Colorblindness explained + On-line tests, including testing children
Discovering and Developing Talents
1. Explaining Color Deficiency
The human retina has cone cells which see
mainly red, green and blue. Other colors
are interpreted as mixtures of these . If the red and green cones are triggered,
then the brain thinks "yellow".
Computer monitors and
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A report from the Howard Hughes Medical Institute explains how the condition is inherited.
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Research and articles about the sense of vision. Learn more about how humans see, how the eye works, color blindness, and more. From the Howard Hughes Medical Institute.
Breaking the Code of Color
Color Blindness: More Prevalent Among Males
Breaking the Code of Color:
Some 10 million American menfully 7 percent of the male populationeither cannot distinguish red from green, or see red and green differently from most people. This is the commonest form
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Wikipedia article includes a simple diagnostic test, rates of incidence, causes, and types of deficiency.
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From Wikipedia, the free encyclopedia
"Colorblind" and "Colourblind" redirect here. For other uses, see
Classification and external resources
deficiency is the inability to perceive differences between some of the
that others can distinguish. It is most often of
nature, but may also occur
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to ID those who will progress to develop more severe retinal disease
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Please visit the Defeat Diabetes Foundation's new Web site at:
Color Vision Test Detects Diabetic Retinopathy
Automated tritan contrast threshold (TCT) assessment identifies
sight-threatening diabetic retinopathy before vision is lost.
Color vision often
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Arizona State University provides definitions and tests.
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Explanation of how we see colors. Learn what are rod cells. Why cone cells in the eye help humans perceive colors.
Words to know before you read
Ishihara test- Named after its inventor, this test is
used to detect your ability to see colors.
Photon- the smallest bit of light
Photoreceptor- the special type of cell in your eye that picks up
photons and then signals the brain. They are located in the retina
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Describes signs, testing, causes, types, and disadvantages. From the Optometric Physicians of Washington (OPW).
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Your eye care resource center from the Optometric Physicians of Washington (OPW).
by Marianne Deal Stephens Color Vision Deficiency, also called Colorblindness, affects 8% of boys and 0.5% of girls, or about 1 in 25 children. An affected child sees colors differently than most of his or her classmates or family members. Depending upon the type of Color Vision Deficiency, a
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Illustrates "how people with less than three types of cones can confuse different wavelengths."
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These pages contain a series of Java applets designed to illustrate how human photoreceptor cones are sensitive to different wavelenghts of light, and how people with less than three types of cones can confuse different wavelengths.
simulates normal, trichromatic vision.
simulates Protanopia, a
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