Comparative Effectiveness of the Dexamethasone Intravitreal Implant in Vitrectomized and Non-vitrectomized Eyes With Macular Edema Secondary to Central Retinal Vein Occlusion

BACKGROUND AND OBJECTIVE: To compare duration and efficacy of the dexamethasone (DEX) intravitreal implant in vitrectomized (pars plana vitrectomy [PPV] group) and non-vitrectomized eyes (control group) with macular edema related to central retinal vein occlusion (CRVO). PATIENTS AND METHODS: Eyes that received the DEX implant for CRVO related to macular edema were included in a retrospective chart review. Outcomes measured were best-corrected visual acuity (BCVA) and central macular thickness (CMT). RESULTS: Fifteen eyes were included in the study. Eight of 15 eyes had prior vitrectomy. Mean BCVA was 20/160 in both groups. Baseline mean CMT was 550 μm (PPV group) and 556 μm (control group, P = .70), and improved to 307.5 μm (PPV group) and 316.3 μm (control group) (P = .90) after implant. The BCVA was 20/125 (PPV group) and 20/200 (control group) (P = .60). Time to next procedure was similar in both groups. CONCLUSIONS: This retrospective study shows similar CMT reductions with DEX implant treatment for CRVO-related macular edema in vitrectomized and non-vitrectomized eyes.