Glioma of the optic nerve is usually –

Optic nerve glioma Optic nerve glioma, also referred to as juvenile pilocytic astrocytoma, is the most frequent tumour of the optic nerve in childhood. It is a developmental hamartoma. It is either stationary or only slowly progressive. Tumour may arise in any portion of the nerve → Intraorbital, Intracanalicular Intracranial