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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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.