A cataract is a clouding of the normally clean lens of your eye. For people who have cataracts, seeing thru cloudy lenses is a piece like searching through a frosty or fogged-up window.
Clouded vision resulting from cataracts could make it more hard to study, drive a vehicle (in particular at night time) or see the expression on a chum's face.
Most cataracts broaden slowly and do not disturb your eyesight early on. However with time, cataracts...