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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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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.