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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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Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
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The longest a person has survived after a heart transplant is 24 years.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.