As life goes on, we all start to notice certain changes that are a natural part of aging. Maybe our joints aren't as flexible as before, or our hearing just isn't what it used to be. Our vision, too, may be less sharp than it once was.
One cause of impaired eyesight later in life is cataracts. A cataract is a clouding of the lens in the eye. People with cataracts may notice cloudy vision or halos around lights when driving at night. If left untreated, cataracts can greatly limit vision. In fact, some people with severe cataracts may only be able to tell the difference between light and dark.
Cataracts are common in older adults. About half of all Americans will either have cataracts or have had cataract surgery by the time they reach age 80.