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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 human body produces and destroys 15 million blood cells every second.
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Women are 50% to 75% more likely than men to experience an adverse drug reaction.
Did you know?
If you could remove all of your skin, it would weigh up to 5 pounds.
Did you know?
The longest a person has survived after a heart transplant is 24 years.

