<P> The optic nerve is composed of retinal ganglion cell axons and glial cells . Each human optic nerve contains between 770,000 and 1.7 million nerve fibers , which are axons of the retinal ganglion cells of one retina . In the fovea , which has high acuity , these ganglion cells connect to as few as 5 photoreceptor cells ; in other areas of retina , they connect to many thousand photoreceptors . </P>
ganglion axons forming the optic nerve run to the
photoreceptor cells