Mooren’s ulcer a rare cause of peripheral ulcerative keratitis

Authors report a rare cause of peripheral ulcerative keratitis. Mooren’s ulcer is a chronic, painful, relentless ulcerative peripheral keratitis that begins from periphery of cornea near limbus as narrow crescent corneal infiltrate which then progresses circumferentially and centrally. Mooren’s ulcer gets misdiagnosed as peripheral bacterial ulcer or another non-infective peripheral ulcerative keratitis.