Fig. 2. Simplification of the topographic relations between retinal ganglion axons arising from different locations within the retina. The nerve fiber layer axons arise from retinal ganglion cells, travel vitread to the ganglion cell layer, and then make a 90° turn toward the optic nerve. More peripheral retinal ganglion cells send axons more vitread within the nerve fiber layer and more peripherally within the optic nerve.