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Some Causes For Human Blindness (Essay Sample)


For this rough draft, write a brief but detailed essay about your topic. The essay should include the introduction, body, conclusion. Your essay should be at least 2 or 3 doubled-spaced pages 500-700 words and include a minimum of two sources to support your essay.


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What Causes Blindness
There are two kinds of blindness. Clinical blindness and total blindness. Total blindness is whereby the individual cannot totally see anything even light and the individual lives in total darkness. Clinical blindness is defined as the visual impairment that cannot be reversed by corrective eyewear such as glasses or contact lens CITATION Mau14 \l 1033 (Duffy, 2014). It is different from legally blind which means that a person needs a corrective lens in one eye to accommodate their central visual acuity to 20/200 or a lower number CITATION Mau14 \l 1033 (Duffy, 2014). There are varied causes of blindness. Here below are some of the main causes of blindness; clinically and total blindness.
This is one of the main reasons that cause normal sighted individuals to go blind. About half a million people in the world are blind as a result of eye injuriesCITATION Daw14 \l 1033 (Aghadoost, 2014). Any injury that damages the optical nerve or eye muscles that move the eyeball cause blindness. Other injuries are accidental or unavoidable i.e. During surgeries when doctors are carrying out complicated surgeries on an eye or parts of the brain i.e. Removal of tumors or cancerous tissues. In other instances, the eyeball or the eye muscles are damaged when they suffer a shock from an object.
Diseases and other genetic conditions are another major cause of blindness. One of the leading diseases that cause blindness is cancer. Other diseases that because blindness include; Glaucoma which refers to a condition that damages the optic nerves. Refractive errors which are defined as the inability of

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