After cataract surgery, some people notice cloudiness (sometimes called aftercataract) after several months or years. In some people, it can become very dense and cause as much or more vision loss as the original cataract.
A laser is used to cut a hole in the clouded back lining of the lens capsule to allow light to pass through the membrane to the retina at the back of the eye. The YAG laser posterior capsulotomy reduces glare and improves vision. It lets light pass through cloudy regions of the lens capsule that may develop after cataract surgery.