Often after cataract surgery, patients may experience a gradual blurring or filminess to their vision. They may feel their vision is not as sharp as it was when the surgery was initially done. This blurry vision can be caused by scar tissue which develops behind the lends implant and is known as posterior capsular opacification. This may occur weeks or years after cataract surgery. It can be treated with a procedure called YAG capsulotomy. It is a quick and safe laser procedure that removes this scar tissue and results in an immediate improvement in vision.