title: Speculations on the direction of the optic nerve.
abstract: A theory is proposed to explain the direction of the optic nerve on the basis of differing embryonic growth of axons on opposite sides of the nerve head. Several ophthalmoscopic indicators of the direction of the optic nerve are discussed. Some clinical implications are presented.
mesh_terms: D002829:Choroid / Q000002:abnormalities; D006801:Humans; D009898:Optic Disk / Q000002:abnormalities*; D009900:Optic Nerve / Q000033:anatomy & histology / Q000196:embryology / Q000502:physiology*; D012590:Sclera / Q000002:abnormalities