Cystoid macular edema in a low-risk patient after switching from latanoprost to bimatoprost

Purpose To report a case of angiographically documented cystoid macula edema occurring after switching a pseudophakic patient from latanoprost to bimatoprost. Design Observational case report. Methods A 68-year-old man developed intense conjunctival hyperemia and cystoid macula edema after switching from latanoprost to bimatoprost 9 months after cataract surgery in an eye at low-risk for this cystoid macular edema. Results Bimatoprost was discontinued and diclofenac initiated. After 2 months, visual acuity and ocular hyperemia returned to baseline levels. Fundus examination revealed resolution of cystoid macula edema. Conclusion It is possible that pseudophakic eyes that develop intense conjunctival hyperemia associated with ocular hypotensive lipids might be at higher risk for developing cystoid macula edema.