In this episode, Optic Surgeon provides a concise, actionable guide to eyelid swelling for ophthalmology residents and final-year MBBS students. Through a real-world case, we cover key causes (inflammatory, infectious, systemic, traumatic), a systematic workup, and targeted management strategies. A high-yield board pearl underscores the critical distinction between preseptal and orbital cellulitis to prevent vision-threatening outcomes. Perfect for mastering this common clinical scenario. #Ophthalmology