Ophthalmomyiasis externa mimicking acute conjunctivitis in a healthy man

External ophthalmomyiasis is an uncommon condition in humans, caused by the infestation of fly larvae in ocular tissues. It is observed in people engaged in agriculture and livestock work, primarily in warm, humid tropical or subtropical regions ideal for fly breeding. We describe a case of ophthalmomyiasis externa in a man in his early 20s, presenting with redness and foreign body sensation for 3 days, consequent to the entry of dust particles in the eye. On clinical examination, the larvae of Oestrus ovis were identified as causative agents and promptly removed. The patient was treated with topical ofloxacin 0.3%, loteprednol 0.5% and tear substitutes (carboxymethyl cellulose 0.5%), along with a single dose of 1000 µg ivermectin. His symptoms subsided with no subsequent complications. This case emphasises the importance of thorough history-taking, slit-lamp examination and early microbiological diagnosis even after trivial ocular trauma. Timely recognition and appropriate management are essential to prevent visual and structural complications.