Louis E. Mark, et al: Microsurgical Removal of a Primary Intraorbital Meningioma. American J Ophthalmology 86: 704-709, 1978.

Louis E. MARK, MD., JOHN S. KENNERDELL, M.D., JOSEPH C. MAROON, M.D., ARTHUR E. ROSENBAUM, M.D., RALPH HELNZ, MD., AND BRUCE L. JOHINSON, M.D.

The well-known prognosis for meningiomas of the orbit or cranio-orbital junction is visual loss. We recently removed a primary intraorbital optic nerve sheath meningioma in a patient whose visual acuity was finger counting for about six months. Although the tumor encircled the nerve, only mild optic atrophy was present. Postoperatively, visual recovery was almost complete, which was undoubtedly related to a fine balance having been maintained between the compressive force of the tumor and the vascular supply to the nerve. To our knowledge, this is the first report of visual recovery following microsurgical orbital dissection for this type of tumor. (American J Ophthalmology 86: 704-709, 1978)