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.
10 Symptoms of Cataracts: Know the Signs. 10 Symptoms of Cataracts: Know the Signs. A cataract signifies the clouding of the eye lens which naturally affects clarity of vision. In most cases, cataracts develop slowly and may not affect eyesight very significantly. However, they soon begin impacting vision and if left untreated, may even cause blindness.