<prompt> MC optic nerve tumor in children causing blindness:GliomaMeningiomaCraniopharyngiomaAstrocytoma  <response>: a. GliomaRef: Nelsons 20e p 3059, Ghai 8e 612-613High Yield Points about Optic GliomaOptic nerve glioma is the most frequent tumor of optic nerve in childhood; it is a benign hamartoma;Principal clinical manifestations are unilateral loss of vision, proptosis, deviation of the eye optic atrophy 