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Did you know?
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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.
Did you know?
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.