Secondary cataract surgery, also known as YAG laser capsulotomy, treats clouding of the lens capsule that can occur months or years after cataract surgery. This condition is sometimes referred to as a “secondary cataract,” though it is not a true cataract. Patients undergo an eye exam to confirm that capsule clouding is the cause of vision changes. The procedure is performed in an outpatient setting and does not require anesthesia beyond numbing eye drops. During the procedure, a laser is used to create a small opening in the cloudy capsule, allowing light to pass clearly to the retina. The treatment is painless and typically takes only a few minutes. Vision improvement is often immediate, and patients can resume normal activities shortly after the procedure.