Most people are familiar with the term “cataract,” but not everyone can explain exactly what it is. We can begin by saying it is not a disease. Instead, it is a painless clouding of the eye lens, which is normally transparent enough to allow light rays to enter the eye and produce a sharp image on the retina. With cataracts, vision seems to be fuzzy or out of focus. Clouded eye lenses may also lead to double vision, glare from light sources, poor night vision, faded colors, increased nearsightedness, and a ghosting of images. Because other eye conditions can also produce these same symptoms, it is a good idea to have eyes examined when any of these symptoms prove bothersome. If your vision is only slightly blurry, a change in your eyeglass prescription may be all you need for a while. However, after changing your eyeglass prescription, if you are still not able to see well enough to do the things you like or need to do, you will need to consider cataract surgery. Risk factors that increase the risk of developing cataracts include age (70% of U.S. adults over age 75 have cataracts), cigarette smoking, long-term corticosteroid use, eye injuries, prolonged exposure to UV light, diabetes, and obesity.