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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
Terry Winters, Color and Information.
How to calculate monthly mortgage payments at varying amortization periods (Question 1)