Extracranial optic nerve decompression: a 10-year review of 92 patients.

Over a 10-year period the authors have performed 92 transethmoidal optic nerve decompressions for the treatment of visual loss due to various pathological processes, including 45 cases of trauma, 32 cases of neoplasm, 2 cases of bacterial pansinusitis, 5 cases of sphenoethmoidal mucocele, 4 cases of aspergillosis (all were immunocompetent patients), 2 cases of Wegener's granulomatosis, and 2 cases of sarcoidosis. Forty-eight patients (52%) had preoperative visual acuity of light perception or better, and in 44 patients (48%) the preoperative vision was no light perception. Sixty-five patients (71%) achieved improvement of vision postoperatively. Twenty-four patients (26%) had no change in vision and 3 patients (3%) had deterioration of vision after surgery. The mean percentage of improvement was 40.7% +/- 6.9% in the trauma group, 61.6% +/- 23.2% in the neoplasm group, 66.4% +/- 25.2% in the infectious/mucocele group, and only one patient in the inflammatory group had slight visual improvement from no light perception to counting fingers. Extracranial optic nerve decompression can result in the improvement of visual function in some patients with optic nerve injury from various causes.