Intraoperative view of ab externo trabeculotomy combined with lysis of iridocorneal adhesions and optical sector iridectomy. (A) A temporal 3-clock-hour conjunctival peritomy is created. (B) A thick temporal scleral flap is created, approximately one-third corneal diameter in width. (C) Schlemm's canal is incised radially. (D) After the catheter is threaded into the canal and the tip emerges from the sclerostomy, the two ends of the catheter are grasped with forceps and pulled to achieve lysis of iridocorneal adhesions. (E) Temporal iris tissue is grasped with a small-caliber toothed forceps and excised with iris scissors to create a broad, temporal optical iridectomy. (F) Conjunctiva is closed with two interrupted 8-0 polyglactin 910 sutures.