Surgical technique

Our surgical technique was almost identical to that used in our previous study, with the exception of the exclusion of the cataract surgery [17]; in short, trabeculotomy was performed on the nasal side with a Kahook Dual Blade using the ab interno approach via a 2.4 mm temporal corneal incision. Blood reflux was confirmed in all cases intraoperatively and they were washed out with viscoelastic material at the end of the surgery. A topical antibiotic (moxifloxacin) and a corticosteroid (betamethasone sodium phosphate) were administered to the patient 4 times per day postoperatively; in addition, a miotic agent (pilocarpine hydrochloride) was provided to the patient 3 times per day. A miotic agents was also used for 5 times in 2 hours before the surgery. The doses of the drugs were tapered as the postoperative course advanced. On average, they were used for a month. Betamethasone was followed by fluorometholone for another month according to postoperative inflammation. IOP-lowering medications were stopped at the time of the surgery and were re-started based on the decision of the surgeon.