Asthenopia as the presenting symptom in advance allergic fungal sinusitis.

A 14-year-old male presented to the ophthalmology clinic with a history of asthenopia. Laboratory, radiological and histopathological studies confirmed the diagnosis of allergic fungal sinusitis resulting in lateral displacement of the medial rectus muscles. Symptoms improved and near point of convergence recovered after surgical endoscopic decompression of the ethmoidal and maxillary sinuses.