Intraocular Pressure and Eyedrop Usage Reduction with Intracameral Bimatoprost Implant

Sustained intraocular drug delivery devices are being developed to lower intraocular pressure (IOP) and improve adherence in patients with glaucoma. The purpose of this study was to assess the IOP and eyedrop usage reduction effects of intracameral bimatoprost implants. We retrospectively reviewed the records of 46 eyes from 38 patients who received an intracameral implant containing 10 μg of bimatoprost as a replacement or addition to their existing eyedrop regimen and investigated IOP, eyedrop usage, and adverse effects. Patients were followed for an average of 274 ± 104 (mean ± standard deviation) days after implant. Mean reduction in IOP (mmHg) at 3 months ±30 days, 6 months ±60 days, and 12 months ±90 days postoperation compared to baseline was 1.26 ± 2.53 (P = 0.002), 0.93 ± 4.71 (P = 0.098), and 1.35 ± 5.24 (P = 0.053), respectively. Reduction in eyedrops at 3 months ±30 days, 6 months ±60 days, and 12 months ±90 days postoperation compared to baseline were 0.62 ± 0.49 (P < 0.001), 0.55 ± 0.73 (P < 0.001), and 0.51 ± 0.71 (P < 0.001), respectively. Fifteen eyes (32.6%) experienced implant failure, defined as either restarting IOP-lowering eyedrops or undergoing surgical intervention, at an average of 260 ± 122 days after implant. While some patients eventually experienced implant failure, intracameral bimatoprost implants may result in fewer adverse reactions and successfully lower IOP and eyedrop burden over a longer period than previously reported.