Cataracts are the most common age-related occurrence in eyes. The lens becomes thicker and stiffer and appears yellow and cloudy. Eventually it may turn white, changing the colour of the pupil. A cataract may cause your vision to become fuzzy in a progressive fashion and may also be the cause of disabling glare. Once a cataract affects vision too much, a cataract removal operation is generally advised.  This decision is usually made in consultation with an ophthalmologist. The operation is almost always done under local anaesthetic. Once the cataract has been removed an artificial lens is put in to replace it. It is relatively short procedure and an overnight stay in hospital is not required.