...eather Channel - here certain colors just can not be distinguished on their eather maps. Also, maps in general because of the color coding on the legends. Bi-color and tri-color LEDs Light Emitting Diodes Is that gloing indicator light red, yello, or green Traffic lights, and orst of all, Caution lights Color blind people alays kno the position of the colors on the traffic light - in most states, Red on top, Yello in the center, Green or is that blue on the bottom. It isnt good hen e go to a city or state here they put traffic lights horizontal - it takes a couple of days to get used to that one! But caution lights present an entirely different problem. In this situation there is only one light no top or bottom, no right or left, just one light that is either red or yello - but hich is it Getting in the sun ith your girlfriend So, youre out in the boat or on the beach ith your girlfriend and soaking up the rays. But I cant tell until far too late if Im getting red - or if she is. If I can tell its red, by that time its fire engine red and a painful sunburn is already present. Color observation by others Look at those lovely pink floers on that shrub. My reply, looking at a greenish shrub hat floers Purchasing clothing Ive got some really neat colors of clothes. Not everyone appreciates them like I do though they seem to think the colors are strange. I just dont kno hy! Kids and crayons Color vision deficiencies bother affected children from the earliest years. At school, coloring can become a difficulty hen one has to take the blue crayon -and not the pink one- to color the ocean. Test strips for hard ater, pH, simming pools, etc. A color blind person is generally unable to interpret some chemical reactions see that litmus paper turns red by acid identify a material by the color of its flame such as lead blue or potassium purple interpret the chemical testing kits for simming pool ater, test strips for hard ater, soil or ater pH tests - all of hich rely on subtle color differences and a band of similar colors to compare against. Cooking and foods hen cooking, red deficient individuals cannot tell hether their piece of meat is ra or ell done. Many can not tell the difference beteen green and ripe tomatoes or beteen ketchup and chocolate syrup. Some food can even look definitely disgusting to color deficient individuals. For example, people ith a green deficiency cannot possibly eat spinach hich to them just look like co pat. They can hoever distinguish some citrus fruits. Oranges seem to be of a brighter yello than that of lemons. Are you earing lipstick Many color blind people cannot tell hether a oman is earing lipstick or not. More difficult to handle for some is the inability to make the difference beteen a blue-eyed blonde and a green-eyed redhead. Clinical information about color blindnessCones color sensitive receptors containing single visual pigments selective for red, green, and blue light, are present in the normal human eye. Disturbances of color vision ill occur if the amount of pigment per cone is reduced or if one or more of the three cone systems are absent. Although defective color vision may be acquired as a result of another eye disorder, the vast majority of color blind cases are hereditary - present at birth. The gene for this is carried in the X chromosome. Since males have an X-Y pairing and females have X-X, color blindness can occur much more easily in males and is typically passed to them by their mothers. Color blindness is rooted in the chromosomal differences beteen males and females. Females may be carriers of color blindness, but males are more commonly affected. Color blindness is a malfunction of the retina, hich converts light energy into electircal energy that is then transmitted to the brain. This conversion is accomplished by to types of photoreceptor cells in the retina rods and cones. The cones are responsible for encoding color. Each cone contains structures or visual pigments sensitive to one of three avelengths of light red, green, and blue. Normal persons are able to match all colors of the spectrum by mixtures of only three fundamental color sensitivities. Hence, the huge variety of colors e perceive stems from the cone cells response to different compositions of avelengths of light. Defects in color vision occur hen one of the three cone cell color coding structures fails to function properly. One of the visual pigments may be present and functioning abnormally, or it may be absent altogether. For practical purposes, all color-deficient individuals have varieties of red or green deficiency. Blue deficiencies are very rare. Color deficient patients are not completely red or green blind. Compared to persons ith normal color vision, they have some trouble differentiating beteen certain colors, but the severity of the color deficiency is variable. Color blindness is normally diagnosed through clinical testing. See the HYPERLINK http.toledo-bend.comcolorblindIshihara.html Ishihara color test - the one most common test used Although there is no treatment for color blindness, most color deficient persons compensate ell for their defect and may even discover instances in hich they can discern details and images that ould escape normal-sighted persons. At one time the U.S. Army found that color blind persons can spot camouflage colors here those ith normal color vision are fooled by it. Ho color blindness orksThe human eye sees by light stimulating the retina a neuro-membrane lining the inside back of the eye. The retina is made up of hat are called Rods and Cones. The rods, located in the peripheral retina, give us our night vision, but can not distinguish color. Cones, located in the center of the retina called the macula, are not much good at night but do let us perceive color during daylight conditions. Many people think anyone labeled as colorblind only sees black and hite - like atching a black and hite movie or television. This is a big misconception and not true. It is extremely rare to be totally color blind. There are many different types and degrees of colorblindness, really they are color deficiencies since virtually no one is truly blind to all colors. People ith normal cones and color vision are able to see all the different colors and subtle mixtures of them by using cones sensitive to one of three avelength of light - red, green, and blue. A mild color deficiency is present hen one or more of the three cones functions poorly. A more severe color deficiency is present hen one of the cones does not function at all or is missing. Protanomaly one out of 100 males Protanomaly is referred to as red-eakness, an apt description of this form of color deficiency. Any redness seen in a color by a normal observer is seen more eakly by the protanomalous vieer, both in terms of its coloring poer saturation, or depth of color and its brightness. Red, orange, yello, yello-green, and green, appear somehat shifted in hue hue is ...
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