Laser surgery is an advanced technique used for glaucoma treatment. It is a powerful beam of light with a very small spot, and depending on the intensity of the beam, it is able to cause small burns or penetrations of the eye tissue. The beam passes through all layers of the eye and is focused precisely on the eye where it is to be treated. Laser iris perforation replaces peripheral iridotomy, and laser trabeculoplasty provides a means of treating open-angle glaucoma, allowing a large number of patients with early glaucoma to avoid surgery. The advantages of laser treatment for glaucoma are that it is fast, convenient, less painful for the patient, can be performed on an outpatient basis, the amount is easily controlled, and the laser treatment can be repeated several times. The laser has a precise point of action, little damage to adjacent tissues, mild postoperative reactions, quick recovery, few complications, and is safe and effective. If the laser surgery fails, it does not affect the effect of further filtering surgery or other surgical treatment. However, it is not a once and for all thing, because glaucoma can only be controlled but not cured. It is important to see a glaucoma surgeon for regular outpatient review to maintain lifelong useful vision as much as possible.