What is croup? Croup is a fairly common respiratory condition in children usually caused by a viral infection or allergic reaction. Croup affects the windpipe (trachea), the bronchi (airways to the lungs), and the larynx (voice box).
However, as the cataract continues to become denser, vision also becomes more cloudy, and stronger glasses or contact lenses will no longer improve sight. Cataracts typically develop gradually and are usually not painful or associated with any eye redness or other symptoms unless they become extremely advanced.
cataracts more commonly occur as people age and when it is to the point that the person can't see well the cataract is removed and a new lens is put in. it sounds like your doctor didn't explain what it is very well so here check this out you can learn a lot about cataracts through this link.