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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 war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
Did you know?
Excessive alcohol use costs the country approximately $235 billion every year.
Did you know?
People about to have surgery must tell their health care providers about all supplements they take.
Did you know?
The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.