To describe a combined transcranial-orbital approach for en bloc resection of optic nerve gliomas with preservation of the annulus of Zinn that minimizes recurrence and prevents postoperative paralytic ptosis.A retrospective, noncomparative, interventional case series.All patients who underwent optic nerve glioma resections using this technique with the authors between 1994 and 2010.A transcranial-orbital approach is used to resect the intracranial segment of the optic nerve glioma from 2 mm anterior to the chiasm to the posterior extent of annulus of Zinn