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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.
Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
There are 60,000 miles of blood vessels in every adult human.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.