The best period of surgery for acute closed angle glaucoma is related to the patient’s condition. In the early stage when there is no major attack, there will be sore and sleepy nose and sometimes iris vision, iris laser incision can be performed to improve the structure of the angle of the atrium to avoid future glaucoma attacks. When there is an acute attack of glaucoma, if the intraocular pressure cannot be controlled faster, an anterior chamber puncture surgery should be performed to lower the intraocular pressure to normal as soon as possible to reduce the damage to the optic nerve. If the intraocular pressure has been controlled to normal, the next step is to look at the atrial angle, if it is still open, at this time, laser surgery can be done; if the atrial angle is closed more than 1/2, external filtration surgery is done. Surgery should be done when the inflammation in the eye is under control, i.e., when the eye is more stable, not red, and the cornea is not edematous, then external filtration surgery is more appropriate. So there are different treatment options for different disease progression. Some people have an acute attack in one eye, and an iris laser perforation in the other eye to address the crowded structure of the atrial angle, which can prevent an acute attack of glaucoma.