Many cataract surgery patients experience cloudy vision months or years after the cataract procedure.  This condition, sometimes called a secondary cataract or opacified posterior capsule, occurs when the normally clear posterior capsular membrane (which holds the lens in place) becomes cloudy.  A laser treatment called YAG capsulotomy is performed to treat this cloudiness, allowing light to once again reach the retina.  This procedure is quick and painless, and is usually covered by your health provider.