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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The FDA recognizes 118 routes of administration.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.