Unilateral Optic Neuritis and Central Serous Chorioretinopathy following Krait Envenomation: A Rare Case

Abstract Snakebite is a significant yet often underestimated public health issue, particularly in tropical regions. India accounts for a large proportion of global snakebite-related deaths, with neurotoxic and hematotoxin species being primary culprits. This article presents a rare case of a 38-year-old female farmer, who developed optic neuritis and central serous chorioretinopathy (CSCR) in the same eye following a krait bite. Initially treated for cellulitis and coagulopathy with anti-snake venom (ASV), she later developed sudden, painful vision loss in her right eye. Ophthalmic examination revealed a relative afferent pupillary defect, impaired colour vision, and a central scotoma. Fundoscopy showed a resolved CSCR pattern, and electrophysiological tests confirmed optic neuritis. Magnetic resonance imaging (MRI) findings were unremarkable. The neurotoxicity of krait venom, ASV-related reactions, and stress-induced CSCR were considered contributing factors. This case highlights the need for early recognition and management of rare ophthalmic complications following snakebite to prevent long-term visual morbidity.