Surgery for glaucoma is performed in the operating room and is done to increase aqueous fluid outflow and lower eye pressure. These surgeries are done as an outpatient and are typically performed when medical or laser treatment has not adequately controlled a patient’s pressures although sometimes can be done as a primary treatment. Common procedures include traditional surgery such as trabeculectomy, Ex-Press® shunts and glaucoma drainage devices (tube shunts) as well as a group of surgeries collectively known as Micro-Invasive Glaucoma Surgery or MIGS. These are a group of procedures designed to lower IOP with a less invasive approach than traditional surgeries. Each patient is unique, and your doctor will discuss with you which procedure has the highest possible success rate with the least chance of complications for your particular glaucoma problem.