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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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The average adult has about 21 square feet of skin.
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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.