|Illustration courtesy lithograph plate from Gray's Anatomy|
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.
Optic nerve captured at 40x magnification using the BA310 biological microscope and a 5 mega pixel CCD microscope camera.
Damage to the optic nerve typically causes permanent and potentially severe loss of vision. The three most common injuries to the optic nerve are from glaucoma, optic neuritis, and anterior ischemic optic neuropathy.