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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 longest a person has survived after a heart transplant is 24 years.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.