Of course. I have problems distinguishing between certain shades of green/brown/red and blue/purple. For example, I couldn't say for sure what color the band at the top of the "What is your answer" page is, but unless I'm very much mistaken, Yahoo! appears in bright red.
2007-02-27 02:37:38
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answer #1
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answered by Paul The Rock Ape 4
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When we see different colors, we are perceiving differences in the light that is reaching our eyes. The way we see different colors is something like the way we hear different sounds as being "low" or "high." This is called pitch, and it corresponds to the frequency of the sound.
The keys on the left side of a piano keyboard make low-frequency sounds, for example, and the frequency of the sound gets higher as one plays keys further to the right. There is a similar order to the colors we see.
The colors of every rainbow always appear in the same order: red, orange, yellow, green, blue, indigo, and violet. The different colors in each part of the rainbow correspond to a different wavelength of light. Reddish colors are long in wavelength and bluish colors are shorter. And just as there are many notes on the piano, there are many wavelengths of light corresponding to different colors.
How Does the Eye Normally See Colors?
Think of your eye as a camera. The front of the eye contains a lens that focuses images on the inside of the back of the eye. This area, called the retina, is covered with special nerve cells that react to light.
For more on the different parts of the eye, see the article called The Amazing Human Eye.
These retinal nerve cells include the rods and cones. The rods and cones react to light because they contain pigments that change when light strikes them.
The cones are responsible for color vision. There are several kinds of pigments present in three types of cone cells. Some cones react to short-wavelength light, others react to medium wavelengths, and others react to higher wavelengths.
There is only one kind of pigment in the rods, and it reacts the same way to any wavelength of light. The rods do not have anything to do with color vision; however, they are very sensitive to light and allow us to see at night.
When the rods and all the types of cones are working together, the eye sees all possible colors. It is something like the way a painter can mix just a few colors together and make paint of every possible color.
What Is Color Blindness?
If there is some problem with the pigments in the cones, the eye will not see colors in the usual way. This is called color deficiency or color blindness.
If just one pigment is missing, the eye might have trouble seeing certain colors. Red-green colorblindness - where red and green might look the same - is the most common form of colorblindness, followed by blue-yellow colorblindness.
In some eyes, none of the pigments are present in the cones, so the eye does not see color at all. This most severe form is known as achromatopsia.
What Causes Color Blindness?
Color blindness is a genetic condition that only rarely occurs in women, but affects about 1 out of every 10 men to some degree. When someone is colorblind, it is usually because their eyes do not make all the pigments needed for color vision.
Does Color Blindness Cause Other Health Problems?
The kind of color blindness that is present at birth does not lead to additional vision loss or total blindness. But because the cone cells of the retina are also used to see fine details, people who are colorblind tend to have vision that is less sharp. The rod cells also tend to be "overloaded" by bright light, so tinted eyeglasses often help color-blind people to see better.
If you think you have a problem with color vision, you should schedule an appointment with an eye doctor right away. The doctor will be able to tell you whether you are seeing colors properly and what to do if you are not.
Reviewed by the doctors at The Cleveland Clinic Cole Eye Institute.
2007-02-27 10:07:54
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answer #2
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answered by InLoveandWar 4
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Color blindness is just a term in a common speech which describes all types of color vision deficiencies. These range from mild problems where one can't distinguish certain shades of color to complete color blindness (monochromacy) where one sees only in "grayscale".
Red-green is the most common form of color blindness, whereas it doesn't mean, that affected people can not see those colors or see them in gray. They just can't distinguish certain shades of this colors, like seeing in the dawn.
2007-03-02 17:03:35
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answer #3
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answered by Colblindor 2
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well I am assuming that you mean color deficient. There are very few people who are color blind and actually see only black and white. Most people that have problems with colors have problems with certain shades of certain colors. Most common are red and green
2007-02-27 10:23:12
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answer #4
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answered by idoc4u2 3
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Yes, my cousin is color blind with red and green. I think I might be color blind with the colors blue and black.
2007-02-27 10:07:45
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answer #5
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answered by ray91_91 2
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hi, yea im colour blind and i see quite a few colours, red, green and greyish.
apparently the colours i think are red could be yellow or pink (i wouldnt know, never seen them obvioulsy)
the colours i see as green can be blue yellow, brown
its not just one colour for each, theres light red, green and dark red etc
hope this helps!
2007-02-27 10:09:18
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answer #6
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answered by Emz 1
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Yes, it is possible to see some colors if colorblind. There are many different degrees of being colorblind. For example, my uncle is colorblind and he can see every color except magenta.
2007-02-27 10:11:54
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answer #7
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answered by spiderswol 1
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oh deffinitley. generally poeple who are color blind only have trouble distinguishing between certain colors. Like red and orange. You normally see full color excpt for your problem color, and if your problem color were orange whereever there were ornage you would just see grey.
2007-02-27 10:07:14
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answer #8
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answered by coffeelover 3
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yes, my uncle can't tell red and green, but he does know most other colors
2007-02-27 10:07:40
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answer #9
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answered by pixie 4
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Uh-yeah,. That's what colored blind is- can't see red or green.
2007-02-27 10:08:09
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answer #10
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answered by Bzetta 1
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