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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.
Medication errors are three times higher among children and infants than with adults.
Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.