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Did you know?
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.
Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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