Cataracts
A cataract is opacity that develops in the eye's envelope or in its crystalline lens. Derived from the word "cataracta" which is a Latin word for "waterfall" and "kataraktes" which means "to wash down" in Greek. The eye lens work like camera lens. The light is focused into the retina at the back of the eyes. The lens aids the focus of the eyes letting the eyes observe clearly. The crystalline lens of the eyes is primarily made up of water and protein. The protein is naturally bonded together so that light may pass through. Cataract is formed when that bond modifications and the molecules of protein are clump together. These clumps block the light entering the lens. As we age these clumps grow bigger and cloudier. Researchers are not certainly why the eye lens alteration as we age, thus forming cataracts. Although not common, cataract also springs up on young persons. These are sometimes caused by eye trauma, prescription drugs or incessant medical conditions. However they have identified some risk reasons of which can cause cataract. These include the long-term exposure to ultraviolet light, secondary effects of diseases such as myotonic, dystrophy, diabetes and Wilson's disease. Fetal exposure to radiation, alcohol and abuse of materials during pregnancy add a high risk factor. Smoking is one of the main risk factor of cataract. Long term alcohol use leads to the development of cataract; this is because alcohol can lead to vitamin deficiency. Vitamin C and vitamin E insufficiency are said to may have linked to the development of cataract. Eye infection also is a main risk. A tumor may cause modifications that will often lead to cataract development. Cataracts are categorized into three types because the eye lens comprises of three components. These are the nucleus or the center lens, the lens cortex or the periphery, and the membrane that envelops the lens or the capsule. Nuclear Cataract The the bulk common cataract found among older patients. This type of cataract develops in the nucleus. Nuclear cataract can take years to develop. Cortical Cataract This type of cataract forms in the peripheral area or the lens cortex area. Cortical cataract is average among patients who are diabetic. If left untreated it will sooner or later extend its spores into the center. Subcapsular Cataract Subcapsular cataract develops at the back of the lens area and sometimes in the center. Rapid symptoms can eventuate in just over month's period. In the early stages of cataract, cataracts tend to obtain in the way of with the vision. Causing blurred or hazy vision, however this can be ameliorated by using new glasses, magnification, adequate lighting, strong bifocals or any other visual aid. But if the symptom worsens, making it hard to do everyday activities such as driving, reading or working it may need to be surgically removed by your ophthalmologist. |
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