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PRECIS Surgeons that perform cataract surgery combined with endocyclophotocoagulation (ECP) should rely on their preferred intraocular lens (IOL) calculation formula. There is no need to perform any correction to the IOL power, as this procedure does not modify the refractive outcome. PURPOSE The purpose of this study was to compare postoperative refractive outcomes in patients with glaucoma who underwent phacoemulsification and IOL implantation with or without ECP and the change in intraocular pressure (IOP) and number of antiglaucoma medications between groups. METHODS A cross-sectional study in which the medical records of the patients with any type of glaucoma, who underwent phacoemulsification with IOL implantation in the capsular bag in addition to ECP or as a standalone procedure from June 2016 to August 2019 were analyzed. Clinical data collected included axial length, steep, flat, and mean keratometry values, target spherical equivalent (SE) estimated by the SRK/T formula, manifest refraction SE at the 1-month follow-up, IOP, and number of antiglaucoma medications before and 12 months after surgery. Primary and secondary outcome measures were the mean predictive error (MPE), the postoperative SE, and the change in IOP after surgery in both groups, respectively. Significance was assessed using the Student t test for all variables between groups according to data distribution. P-values