A 42-year-old male presented with complaints of foreign body sensation in his left eye after an insect flew into his eye during a wind storm 2 days prior. Slit-lamp examination revealed a single tiny, translucent, larva slithering over the bulbar and palpebral conjunctiva. The response of the larva to light, 1% tropicamide, and 4% xylocaine was observed. The larva was then transported live for microbiological evaluation, and the locomotory pattern was studied. It was identified as the first instar larva of Oestrus ovis, and diagnosis of ophthalmomyiasis externa was made.