Color Blindness Essay

1517 Words Jun 20th, 2012 7 Pages
1st period

Color Blindness Color blindness is the inability to see certain colors in the usual way; also called a color vision problem. A color vision problem can change your life. It makes it harder to learn and read, and you may not be able to have certain careers. Many young children get teased because of their condition, and few will believe what they are told. But people with color blindness can and have learned to make up for their problems seeing color. Color blindness affects a good amount of people, although exact proportions are different among ethnic groups. For example, in Australia it occurs in about eight percent of males and about point four percent of females. Isolated groups with a little gene pool
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Men are carrying just one X chromosome, so they will either not have it or do have it. Color blindness is most commonly inherited from mutations on the X chromosome but the chromosomes have shown there are many mutations; mutations capable of causing the condition to originate from at least 19 different chromosomes and 56 different genes (as shown online at the OMIM database at John
Hopkins University). Another possible advantage might result from the presence of a tetra chromic female. With an X-chromosome, females, who are heterozygous often, have at least four types of cones in their retina. It is possible that this affords them an extra dimension of color vision. Any recessive gene that continues at five percent is generally said as having some evolutionary advantage over the long term, such as camouflage.

At one time the U.S. Army found that color blind people could spot "camouflage" colors that fooled those with normal color vision. ( “Copyright © 1992-2012, Gianni A. Sarcone, Archimedes-Lab.org. Used with permission"; http://www.archimedes-lab.org/colorblindnesstest.html) There is no safe treatment of color blindness for humans. However, there are special contact lenses and glasses that may help people with it to tell the difference between similar colors. There are a few ways to test if a person is color blind. The most used way to tell is the Ishihara plates test. (Buckner, Robert;

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