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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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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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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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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It is difficult to obtain enough calcium without consuming milk or other dairy foods.