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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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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.