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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?
Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
Did you know?
People about to have surgery must tell their health care providers about all supplements they take.
Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.