Raw Onion and Ophthalmic Surgery: Evidence-Based Risks for Ocular Irritation, Reflex Lacrimation, and Safety
“Raw onion” is notable in ophthalmic contexts because its volatile sulfur compounds (e.g., syn-propanethial-S-oxide) are potent ocular irritants. These compounds are released when onion tissue is cut, then reach the eye and activate trigeminal sensory pathways. The immediate clinical consequence is reflex tearing (lacrimation) and blinking, mediated by afferent signaling through the ophthalmic branch of… Read More »