Abstract

To compare outcomes of phacoemulsification combined with endoscopic cyclophotocoagulation (phaco/ECP), first generation iStent implantation (phaco/iStent), or both (phaco/iStent/ECP) in patients with open-angle glaucoma. A retrospective chart review was performed on patients at the University of Colorado Department of Ophthalmology. Outcomes included intraocular pressure (IOP), medication use, best corrected visual acuity (BCVA), and surgical complications were analyzed. Success was defined as IOP reduction of≥20% and/or reduction by at least one glaucoma medication. A total of 394 eyes were included in the study. There were 170 eyes (43.1%) in the phaco/ECP group, 175 eyes (44.4%) in the phaco/iStent group, and 49 eyes (12.4%) in the phaco/iStent/ECP group. The mean pre-operative IOP was 15.9mmHg for phaco/ECP, 15.8mmHg for phaco/iStent, and 15.2mmHg for phaco/iStent/ECP. At 24months, the mean IOP was 13.7mmHg (p<0.0001), 14.2mmHg (p=0.0001), and 13.0mmHg (p=0.0007), respectively. The mean pre-operative number of glaucoma medications was 2.0 for phaco/ECP, 1.4 for phaco/iStent, and 2.2 for phaco/iStent/ECP and at 24months post-surgery decreased to, 1.8 (p=0.011), 0.9 (p<0.0001), and 1.7 (p=0.01), respectively. The success rate at 24months was 54.4% for phaco/ECP, 75.3% for phaco/iStent, and 55.6% for phaco/iStent/ECP. Phacoemulsification when combined with ECP, iStent, or both, lowered IOP and glaucoma medication reliance at 24months. The success rate for phaco/iStent was significantly higher than phaco/ECP. When iStent was added to phaco/ECP, the success rate was higher at earlier postoperative visits compared to the phaco/ECP alone.

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