Efficacy and Safety of Gonioscopy Assisted Transluminal Trabeculotomy in Patients with Primary Open-angle Glaucoma and Cataract.

Inclusion Criteria: * Patients aged 40 years or older, * Previously included in the glaucoma departments of the participating institutions, * Indication for cataract surgery, diagnosed by clinical examination with visual acuity (VA) equal to or worse than 20/40, * Primary Open Angle Glaucoma (POAG), determined by the presence of typical visual field (VF) defects and/or by the aspect of the optic nerve observed at fundoscopy or retinography (increased vertical optical excavation with thinning of the neural rhyme, asymmetry of the cup/disc ratio greater than 0.2, localized loss ("notch") or defect in the retinal nerve fiber layer ("Hoyt")). * APIC classification with amplitude greater/equal to 2 and pigmentation less than 4 on gonioscopy. * Intraocular pressure (IOP) less than or equal to 25 mmHg before washout of hypotensive eye drops. * IOP between 22 and 30 mmHg after washout of hypotensive eye drops or with a history of IOP greater than or equal to 21 mmHg in more than one previous care described in the medical record. Exclusion Criteria: Patients who have any of the following situations: * Severe glaucoma, determined according to the Hoddap-Parrish-Anderson criteria; * Axial diameter greater than 26 mm or less than 21.00 mm; * Endothelial count less than 1500 cc; * Pachymetry less than 480 or greater than 600 microns; * Patients undergoing some type of intraocular surgery or laser procedure in the preoperative period and/or after these procedures in the postoperative period; * Those who present some important per-operative complication during the study. * With high risk of progression, the so-called rapid progressors, who are patients with high IOPs even with the use of many medications, regardless of the severity of the nerve injury.