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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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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Everyone has one nostril that is larger than the other.
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Approximately 25% of all reported medication errors result from some kind of name confusion.