X-ray vision may be the exclusive property of Superman, but these days a lot of older people have pretty sharp focus, too, thanks to the revolution in diagnosis and treatment of cataracts. In 1984, almost a quarter of all adults 65 and older had a hard time reading a newspaper because of vision problems; by 2010, that number dropped to less than 10 percent!
A cataract is caused by a clouding of the lens, and by age 80, half of all North Americans traditionally have cataracts or have had cataract surgery. What causes cataracts? Your lenses are made of water and proteins. As you age, the proteins can clump together, making it harder to see. Diabetes, smoking and chronic exposure to sunlight also increase the risk.
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