Cataracts are among the most common eye problems and are generally associated with aging. A cataract is the clouding of the lens inside the eye. Untreated, cataracts can lead to difficulty reading, driving or engaging in other day-to-day activities. In severe cases, cataracts can even lead to blindness. The good news is that vision loss related to cataracts is reversible. Almost 25.7 million Americans 40 or older suffer from cataracts, and that number is expected to grow 50% by 2032.