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Ophthalmomyiasis externa caused by Oestrus ovis

External Ophthalmomyiasis caused by Oestrus ovis is the most common cause of human myiasis worldwide. Distinguishing it from other causes is important to prevent sight-threatening complications. Two patients present with pain, redness, and foreign-body sensation in affected eye. Motile larvae were seen on slit-lamp examination later diagnosed as O. ovis infestation on microbiological examination. Larvae were removed and patients were started on topical antibiotics, lubricating eye drops, and systemic antihistaminics and followed up for 3 weeks. Improvement was observed within 1 week of treatment. Early diagnosis will help to know the possibility of internal ophthalmomyiasis.