Courtesy of the National Eye Institute click on numbered labels Eyelid for more inform ation over 2 ris 6 Lens 10 Optic Nerve 3 Pupil 7 Macula Optic 4 Cornea Disc Vitreous Humor 11 Choroid 12 Retina 14 Extraocular Muscle 15 Visual Pathw ays of the Brain Table of contents