Behind the colored part of your eye (the iris) sits a tiny lens. This lens is normally clear when you are younger. However, as you age this lens starts to get cloudy. Once the lens gets cloudy it is called a cataract. As cataracts progress and get cloudier, they start to cause visual issues. They cause your vision to become blurry, make colors appear duller, and cause you to be more sensitive to glare from lights, such as headlights from cars.
Cataracts are typically monitored every 6 to 12 months until they become advanced. Once they have progressed to the point that they are significantly affecting your vision, they are removed surgically. Cataract surgery is very safe, causes little-to-no pain, and you are able to go home the same day as the procedure.