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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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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.
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Excessive alcohol use costs the country approximately $235 billion every year.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.