Laser iridotomy is a surgical procedure used to treat angle-closure glaucoma. This laser procedure is also performed in patients who are at risk for angle-closure glaucoma. As with many medical conditions, it is preferable to treat patients at risk and thereby avoid vision loss. Using a laser, a small hole is made in the iris to create a new pathway for the aqueous fluid to drain from your eye. The new drainage hole allows the iris to fall back into its normal position, restoring the balance between fluid entering and leaving your eye and lowering the eye pressure. The surgery is performed by your ophthalmologist on an outpatient basis, usually in his or his office. Your eye will be numbed with eye drops. A contact lens is placed on your eye to precise guide for the laser. A hole about the size of a pinhead is made in your iris. The actual procedure will only take a few minutes. You should have someone drive you home afterwards.