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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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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.
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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.