Causes of Visual Impairment

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People from childhood learn the world through vision, thanks to vision a person perceives surroundings. That is why it is very important to preserve vision in good condition and take care of it all life long. However, there are situations when it may be impaired. The main causes of visual impairment include spinal problems, contamination of the body, psychological factors and various diseases (Subramanian, 2014). Diseases cause violations in various systems of the body, one of the possible stages is blurred vision. Most dangerous eye diseases are of infectious venereal nature. Bacteria and viruses primarily influence nervous system. Impaired vision is a direct consequence of the problems in visual nerve centers. This research paper examines the five causes of vision loss: Cataracts, Glaucoma, Diabetic Retinopathy, Refractive Error, and Age related macular degeneration. Cataract Cataract is one of the most common eye diseases among the elderly. Cataract is an ophthalmic disease associated with clouding of the eye's lens and causing different degrees of visual disturbances up to the total loss of vision. In some cases, the disease can develop under the influence of external factors, such as under the influence of radiation or as a result of certain diseases, particularly diabetes. The majority of cataracts is a natural result of aging. Physically, clouding of the lens is caused by the denaturation of the protein, which is part of the organ. Cataracts occur at any age. There
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