Fig. 1

Trabeculo-canalectomy procedures. a Dissecting a rectangular superficial scleral flap of 4 × 4 mm and in 1/2 scleral thickness at the superior limbus into the transparent cornea. b Locating Schlemm’s canal. Black arrows indicate the broken end of Schlemm’s canal. c Inserting the corneal scissors into the broken end of Schlemm’s canal. d Opening the outer wall of Schlemm’s canal. Black arrows indicate the unroofed Schlemm’s canal. e Removing the outer wall of Schlemm’s canal and the juxtacanalicular trabecular meshwork. f Peripheral iridectomy. g Injecting moderate viscoelastic agents under the scleral flap to reinsert the iris. h Closing the scleral flap tightly with two sutures of 10 − 0 nylon. i Suturing the conjunctiva-Tenon’s layer with 10 − 0 nylon at the end of the incision