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What´S Color Blindness? Essay

1648 words - 7 pages

Colorblindness is a condition where areas on the eye cannot discriminate colors apart. Color determination is important in animals to conduct everyday tasks. With color vision defects come several different types of the condition that cause certain colors to not be detected within the subject. Colorblindness is usual caused through inheritance from the genetic chromosomes passed from parent to offspring in sex chromosomes, however colorblindness can be acquired through outside incidences. Colorblindness’ symptoms are, in general, when the affect persons clearly cannot distinguish color hues apart such as blues and yellows and reds and greens. Colorblindness can be diagnosed through tests ...view middle of the document...

The monochromacy condition is where the patient is fully colorblind and cannot distinguish between hues of colors and can only see differentlevels of light as in, black, white and gray. Rod monochromacy occurs when the gene from both parents is inherited, this happens in about one of every 30,000 people. Dichromacy however can tell color hues apart, the different types of dichromates types are protanopia, deuteranopia and trianopia. Pro- and deuteranopia have defects in the red and green hues. They struggle between the reds, greens and yellows however can discriminate between yellows and blues. Males get the defective gene from their mother and these males pass the gene to all daughters and no sons. Females tend to be carriers of the gene and receive it from both parents. Trianopia is the opposite, the can distinguish greens and reds but not yellows and blues. Trianopia affects one in every 15,000 to 50,000 depending in source and happens equally in males and females. Ones who suffer from trichromacy can distinguish between colors better but still remains abnormal. Trichromacy is divided into protanomaly and deuteranomaly, both are inherited the same as dichromacy. Trichromacy can range from severe cases of it to very mild cases, some mild cases do not even know they are affected. There is also another type o ftrichromacy, trianomaly, which is acquired and not inherited (University of Illinois).
Colorblindness happens when color-sensing granules have a defect in the nerve cells to the eye, the cells being called cones. They are found in a light sensitive are of eye tissue called the retina. If one of these pigments in the eye is missing, inactive or defective then one may have trouble determining between reds and greens or blues and yellows or even no ranges of colors at all, only degrees of light. Most color detection issue is related to the genetics and inheritance of the patient. Color distinguishing issues occur with the sex linked recessive X-chromosome gene and occur in 1 out of 10 men and not very often occur in women (U.S. national library of medicine). Color deficiency does not have to be genetic but can also be causes by disease and injury. Damage to the optic nerve or retina can cause color recognition loss along with such diseases as: macular degeneration, Alzheimer’s disease, Parkinson’s disease, multiple sclerosis, glaucoma alcoholism, leukemia, diabetes and sickle cell anemia. Various medications, old age and even chemical exposure can lead colorblindness (American Optometric Association).
Symptoms of being colorblind are fairly simple in context although a person may have it and not even know. They may only realize it when situations arise that cause confusion when colors are differentiated differently between people or colors are not distinguished at all. The affected person will however notice they have a color detection problem when they either see different shades of green and red, different shades of blue and yellow or...

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