Optic Nerve

February 14, 2012 1103 No of hits
0
Optic Nerve

The optic nerve is a bundle of nerve fibers that connects the retina (at the back of the eye) and the visual center of the brain. The nerve transports visual information from the retina to the brain, so that the brain can interpret the data into visual images. It is located near the macula, which is the center of the retina that provides sharp central vision. The part of the eye that protrudes through the retina and can be seen on an eye examination is called the optic disc. The optic nerve is actually more similar to brain tissue than to eye tissue. In fact, when a fetus begins to develop, the optic nerve is actually part of the brain. Only as the fetus develops binocular vision do the optic nerves move behind the eyes.

The optic nerve contains two blood vessels: the central retinal artery and the central retinal vein. The central retinal artery carries nutrients to the retina, and the central retinal vein carries waste away from the retina. Each eye has a separate optic nerve that leads from the retina towards the brain, and the two nerves join together at the optic chiasm, which is located between and behind the two eyes.

There are several problems that can affect the optic nerve, such as optic nerve neuritis, optic nerve atrophy, and optic nerve hypoplasia. Optic nerve neuritis is the inflammation of the optic nerve, and it is often caused by multiple sclerosis (MS). Optic nerve atrophy occurs when optic nerve fibers begin to die off, giving the nerve a whitish color (rather than its normal pink). Optic nerve hypoplasia, a birth defect, occurs when a fetus's optic nerve remains underdeveloped during eye formation. All of these conditions can cause anything from temporary loss of sight to complete blindness, and should be brought to medical personnel immediately.

Tags:   Optic nerve   Retina   Optic nerve neuritis   Optic nerve atrophy   Optic nerve hypoplasia  

Group

Optic Nerve

Photo

Ni_271_192 Be the first to add photo

Discussion topics

Start new topic
1_s_ab45ca8ce8fb1beb
0 Comments

The optic nerve is a bundle of nerve fibers that connects the retina (at the back of the eye) and the visual center of the brain. The nerve transports visual information from the retina to the brain, so that the brain can interpret the data into visual images. It is located near the macula, which...

By: Richard Martine Created 23 months ago

Add New Comment

You've decided to leave a comment. That's fantastic! Let's have a personal and meaningful conversation. Thanks for dropping by!

Groups

Related Groups

  • Optic Nerve
    2128_s_80d4fa1283442dbc
    Optic Nerve

    The optic nerve is a bundle of nerve fibers that connects the retina (at the back of the...

    Read More »
  • Optic Neuropathy
    748_s_37ed1311d36c3ed9
    Optic Neuropathy

    Optic neuropathy, also called optic atrophy, is a condition that occurs when the optic...

    Read More »
  • Optic Neuritis
    747_s_2c1b6ec5b5b705d6
    Optic Neuritis

    Optic neurosis is a condition in which the optic nerve becomes inflamed. The optic nerve...

    Read More »

Topic

Related Group Topics

  • Optic Nerve
    Optic Nerve
    By : Richard

    The optic nerve is a bundle of nerve fibers that connects the retina (at the back of the eye) and the visual center of the brain. The nerve transports visual information from the...

    Read More »
  • Optic Neuropathy
    Optic Neuropathy
    By : Richard

    Optic neuropathy, also called optic atrophy, is a condition that occurs when the optic nerve is damaged. The optic nerve is a bundle of nerve cells that carries messages from the...

    Read More »
  • Optic Neuritis
    Optic Neuritis
    By : Richard

    Optic neurosis is a condition in which the optic nerve becomes inflamed. The optic nerve is a group of axons (neuron parts) that transmit visual information from the retina to the...

    Read More »

Album

No photo album for this group

Photo

No Photos availabe for this.

Most Rated

Most Commented

  • Religion
    Religion
    Religion

    Merriam Webster defines religion as "service and worship of God or the supernatural" or...

    Read More »
  • Bruckner, Anton
    Bruckner, Anton
    Bruckner, Anton

    Joseph Anton Bruckner (1824-1896) was an Austrian composer whose classical career began later...

    Read More »
  • Skeletal System
    Skeletal System
    Skeletal System

    The skeletal system provides support to your body, protects your internal organs and works...

    Read More »

Most Viewed