ABSTRACT
In primary open-angle glaucoma the main site of aqueous-outflow resistance is thought to be at the level of juxtacanalicular trabecular meshwork and the inner wall of Schlemm’s canal.1 In other types of secondary open-angle glaucoma-such as pseudoexfoliative glaucoma, pigmentary glaucoma, some types of
uveitic glaucoma, and traumatic glaucomathe resistance of aqueous outflow is probably also in part located at the same site. By removing the internal wall of Schlemm’s canal and the juxtacanicular meshwork, the main outflow resistance in these patients can probably be relieved.
