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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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Medication errors are more common among seriously ill patients than with those with minor conditions.
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There are 60,000 miles of blood vessels in every adult human.
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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.