Glaucoma surgery is usually not done on both eyes at the same time, most notably because the onset of the condition in both eyes may not occur at the same time. On the other hand, in order to prevent postoperative infections and complications, the surgery will be chosen to be done at different times. Glaucoma causes elevated intraocular pressure and blurred vision. During an acute attack, the intraocular pressure needs to be controlled before surgical treatment. For safety reasons, surgery on one eye will be performed to minimize the risk of post-operative infections and complications. Surgery on both eyes will be performed 2 to 3 days apart, and the exact condition will vary from person to person. Glaucoma surgery may cause bleeding or infection during the operation, so for safety reasons, it is recommended to choose some more formal hospitals for treatment, follow the doctor’s instructions for post-operative care, and consult the doctor in time when discomfort occurs.