A cataract is a clouding of the normally clear lens of your eye. For people who have cataracts, seeing through cloudy lenses is a bit like looking through a frosty or fogged-up window. Clouded Vision caused by cataracts can make it more difficult to read, drive a car (especially at night) or see the expression on a friend's face.
Most cataracts develop slowly and don't disturb your eyesight early on. Over time, cataracts will eventually interfere with your vision.
At first, brighter lights and eyeglasses can help you deal with cataracts. However, if the impaired vision interferes with your usual daily activities, you might need cataract surgery. Cataract surgery is considered a safe and effective procedure.