Defective Vision is a type of eye disorder in which the patient is unable to view far off things clearly. In medical terms this condition is also known as myopia or short sightedness. Defective vision is nothing but a state in which the visual images come to focus in frontage of the retina of the eye. But due to imperfection in the refractive media of the eye it results defective vision of distant objects.
Defective vision is a very common eye disorder and it mainly attacks elder people. Main indications of Defective vision are Blurred vision, watering of eyes, itching in eyes, Mild headache, Heaviness in the eyes etc. Other known reasons of defective vision are improper eating habits, mental strain, and inappropriate blood supply, reading in weak or dim light, extreme watching of TV etc. Short sightedness, or myopia, is a vision problem experienced by about one-third of the population. Defective vision sufferers have trouble in seeing objects at a distance like reading highway symbols, but can they can see up-close tasks like reading or sewing. It is a very common condition. For defective eye treatment intake of vitamin A is of maximum importance because it improves vision.
One of the key categories of defective vision is color blindness. It is an optical imperfection resulting in the failure to colors differentiation. Color blindness is generally a hereditary sex-linked feature. Most of the people suffering with defective color vision are only partly color-blind especially to red and green, i.e., they have imperfect skill to differentiate reddish and greenish shades.
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