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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?
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Did you know?
There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.
Did you know?
The FDA recognizes 118 routes of administration.