A Cataract is a clouding of the lens of the eye. The normally clear aspirin-sized lens of the eye starts to become cloudy. The result is much like smearing grease over the lens of a camera. It impairs normal vision.
There are many causes of cataracts including cortisone medication, trauma, diabetes, many other diseases and simply aging. Cataracts will affect almost all people if they are fortunate enough to live long enough. The symptoms of cataracts include double or blurred vision and unusual sensitivity to light and glare. The ideal treatment for cataracts is surgical implantation of a new lens. Wearing sunglasses can help prevent cataracts.
Symptoms of developing cataracts include double or blurred vision, sensitivity to light and glare (such as bright sun or auto headlights), less vivid perception of color, and frequent changes in eye-glass prescriptions. As the cataract grows worse, stronger glasses no longer improve sight, although holding objects nearer to the eye may help reading and close-up work. The pupil, which normally appears black, may undergo noticeable color changes and appear to be yellowish or white.
Because most cataracts associated with aging develop slowly, many patients may not notice their visual loss until it has become severe. Some cataracts remain small and never need treatment, others grow more quickly and progressively larger. Only when a cataract seriously interferes with normal activities is it time to consider surgery, doctors say. People who depend on their eyes for work, play and other activities may want their cataracts removed earlier than those whose needs are less demanding.
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