Case of bilateral Mooren's ulcers following filtering surgery using EX-PRESS glaucoma filtering devices

Purpose To report our findings in a case of bilateral Moorenu0027s ulcer that developed after filtering surgeries using the EX-PRESS glaucoma filtering device (EX-PRESS surgery). Patients and methods A 71-year-old Japanese man with primary open angle glaucoma underwent EX-PRESS surgery first in his left eye and 1 month later in his right eye. He developed Moorenu0027s ulcer in his right eye at 7 months and in his left eye at 10 months after the initial EX-PRESS surgery. Systemic examinations showed no collagen vascular disease, and he did not have a history of bacterial or viral infections. He was not allergic to metallic materials. Before the EX-PRESS surgery, he had underdone cataract surgery combined with trabeculotomy in both eyes, and a reoperation of trabeculotomy in his left eye. He had not developed Moorenu0027s ulcer after these surgeries. The Moorenu0027s ulcer after the EX-PRESS surgery was treated with oral prednisolone (30 mg tapering) in combination with topical 0.1% betamethasone sodium. The ulcers were responsive and healed well in three months. Conclusions The EX-PRESS devices were most likely the cause of the Moorenu0027s ulcers considering that they were located close to the site of EX-PRESS insertion and no peripheral corneal ulcer developed after prior intraocular surgeries.