Eye: Optic Nerve Tumor (Optic Nerve Glioma)

An optic nerve glioma is a type of brain tumor. Optic gliomas are rare and their cause is unknown. Most optic gliomas are slow-growing, benign (non-cancerous), and occur in children below the age of 20.  Symptoms include involuntary eye movement, bulging eyes, squinting, and vision loss in one or both eyes.