The optic nerve is a cable connection that transmits images from the retina to the brain. It consists of over one million retinal ganglion cell axons. The optic nerve head, or optic<unk>  is the anterior end of the nerve that is in the eye and hence is visible with an ophthalmoscope. It is located nasally and slightly inferior to the macula of the eye. There is a blind spot at the optic<unk>  because there are no rods or cones beneath it to detect light. The central retinal artery and vein can be seen in the middle of the<unk>  as it exits the scleral canal with the optic nerve to supply the retina. The vessels send branches out in all directions to supply the retina.
Optic disc drusen
Macular hole
Macular hypoplasia
Optic disc pallor
Macular corneal dystrophy
Macular edema
Corneal neovascularization
Macular scarring