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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 ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Illicit drug use costs the United States approximately $181 billion every year.
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Persons who overdose with cardiac glycosides have a better chance of overall survival if they can survive the first 24 hours after the overdose.
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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.