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Did you know?
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 longest a person has survived after a heart transplant is 24 years.
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Excessive alcohol use costs the country approximately $235 billion every year.
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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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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.


