Fig. 13 Pathway of ganglion cell axons that originate temporal to the macula (A) do not cross the horizontal meridian. Any damage to the superior ganglion cell axons at the optic disc will generate atrophy within the superior nerve fiber layer (B). The visual field defect will be inferior but not crossing the horizontal plane. (Hoyt WF, Rios-Montenegro EN, Behrens MM, et al: Homonymous hemioptic hypoplasia: funduscopic features in standard and red-free illumination in three patients with congenital hemiplegia. Br J Ophthamol 56:537, 1972)