YAG laser treatment, also known as a posterior capsulotomy, is a laser treatment for patients who have had cataract surgery. The YAG laser treatment helps eliminate any scar tissue, thus restoring your vision back to normal.   Approximately 50% of people who undergo cataract surgery will eventually need a YAG laser treatment since the clouding/scarring is a part of the eye’s normal healing process.  Occasionally patients experience some clouding in their vision months after cataract surgery due to scarring behind the lens capsule.