Pupillary Peaking & Presence of Dysphotopsias Following Glaucoma Tube Shunt Surgery

Abstract

Purpose: To describe the presence of pupillary peaking and dysphotopsias in a sample of eyes following glaucoma drainage device (GDD) surgery. Methods: Cross-sectional analysis of 68 glaucoma patients with GDD, 45 patients with glaucoma and no GDD, and 50 control patients was conducted in a single academic center. Patients with an appropriate diagnosis that met the inclusion criteria were asked to enroll in the study. All patients received an 8-item dysphotopsia questionnaire and were age-matched. Photographs of pupils were taken to assess pupillary peaking. One-way analysis of variance (ANOVA) testing was performed for statistical analysis. Results: Of the 68 patients with GDD, 25 (36.76%) had pupillary abnormalities with peaking most commonly occurring in the direction of the tube entry superotemporally, and 50 (73.53%) had reported one or more dysphotopsias. In patients reporting one or more dysphotopsias, the rate of lines, crescents, ghost images, and shadows was significantly higher when compared to glaucoma patients without GDD and control patients (p