<prompt> Glioma of the optic nerve is usuallyGemistocyticPilocyticFibrillaryLamellar  <response>: Optic nerve gliomaOptic 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,IntracanalicularIntracranial 