Optic neuropathy following ligation of anomalous band in Duane retraction syndrome.

A 7-year-old boy with a history of Duane retraction syndrome was found to have an anomalous orbital band arising from the right lateral rectus muscle. Surgical removal of this band to correct exotropia resulted in postoperative optic neuropathy and hypoesthesia in the distribution of the superior branch of the trigeminal nerve. This case demonstrates a rare complication of orbital surgery in patients with Duane retraction syndrome. It serves as a reminder to evaluate patients with congenital cranial dysinnervation disorders for additional structural defects and consider orbital imaging in patients with atypical pattern restrictive strabismus.