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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.