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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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People about to have surgery must tell their health care providers about all supplements they take.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Medication errors are more common among seriously ill patients than with those with minor conditions.