Optic nerve

The optic nerve is located in the back of the eye. It is also called the second cranial nerve or cranial nerve II. It is the second of several pairs of cranial nerves. Although the optic nerve is part of the eye, it is considered to be in the central nervous system. The job of the optic nerve is to transfer visual information from the retina to the vision centers of the brain via electrical impulses. The optic nerve is made of ganglionic cells or nerve cells. It consists of over one million nerve fibers. Our blind spot is caused by the absence of specialized photosensitive cells, or photoreceptors, in the part of the retina where the optic nerve exits the eye. Glaucoma is the most common illness affecting the optic nerve. Glaucoma is caused when high intraocular pressure, or high pressure, is in the fluid in the eye (vitreous fluid). This high pressure compresses the optic nerve and causes cells to die, and is referred to as atrophy of the optic nerve.
Written and medically reviewed by the Healthline Editorial Team
Co-developed by:

In Depth: Optic nerve

Debugging Tools

Level: 3
Frame: 1
Toggle Hotspot
VP Data Tool
HexTable json from Steve
Steve's ajax layer update call:
[still on original layer]

Ad values:

adModel.dfpAdSite: hn.us.hl.bm.x.x.rfs
adParams['k1']: othereyeproblems,optic_nerve,8002446

More on BodyMaps

Take a Video Tour

Learn how to rotate, look inside and explore the human body. Take the tour

BodyMaps Feedback

How do you like BodyMaps? How can we improve it? Tell us what you think
Advertisement
Advertisement