Category: 

What Is Optic Nerve Damage?

The optic nerve transmits the signals of the eye to the brain and can seriously affect vision if damaged.
Article Details
  • Written By: Mary McMahon
  • Edited By: Kristen Osborne
  • Last Modified Date: 12 September 2014
  • Copyright Protected:
    2003-2014
    Conjecture Corporation
  • Print this Article
Free Widgets for your Site/Blog
There is enough iron in the human body to make a nail.  more...

September 22 ,  1862 :  US President Abraham Lincoln announced his preliminary Emancipation Proclamation.  more...

Optic nerve damage is an injury to the optic nerve leading to permanent vision loss. Depending on the extent of the damage, people may experience partial or total vision loss in the involved eye. This damage is usually not reversible, making it important to be proactive about eye health to prevent injuries to the optic nerve, if possible. Some people are born with optic nerve damage, a result of problems with development, and may have limited or nonexistent vision from birth.

The optic nerve relays information from the retina to the brain and is a part of the central nervous system. It consists of tight bundles of individual nerve cells, very densely clustered to relay extremely detailed information. When optic nerve damage occurs, people may notice problems with the visual field like dimming, spotting, complete darkness in one area, or blind spots. Issues like blurriness and floaters are usually the result of problems in the front of the eye.

One potential cause of optic nerve damage is inflammation, caused by optic neuritis. Consistent untreated inflammation can cause the nerve cells to start breaking down, interfering with their ability to relay information. Glaucoma, a condition people usually associate with high pressure in the eye, can also damage the optic nerve. Tumors may grow on or press against the nerve, causing injuries. Interruptions to the blood supply caused by vascular disease can also be a source of injuries to this nerve.

Ad

Blunt force trauma to the head can sometimes cause optic nerve damage. While this nerve is insulated in the skull, penetrating injuries to the eye socket may strike the nerve, or crush injuries to part of the head can compress it, cutting off the blood supply and causing cells to die because they cannot get enough oxygen and nutrients. Optic nerve damage can also be the result of mistakes made during surgery, although care is taken to avoid this nerve if at all possible in surgical procedures.

When patients experience problems with their eyesight, a physical examination to check for optic nerve damage is an important step for addressing the tissue. The doctor can determine what is going on inside the eye and start to develop plans for treating the problem and arresting the damage. People with a higher risk of optic nerve damage, such as people with diabetes and high blood pressure, may need to visit the doctor regularly to identify any early warning signs, with the goal of stopping damage as soon as it begins to appear.

Ad

More from Wisegeek

You might also Like

Discuss this Article

SarahGen
Post 3

I have optic nerve damage and partial loss of eyesight due to inflammation. My doctor told me that the cause of the inflammation is a viral infection I suffered from several months ago.

I had never heard of a virus causing damage to the optic nerves before. I haven't been able to find any information on it either. All I know is that I had great vision, with only astigmatism before this inflammation took place. I've been put on steroid medications now. We are hoping that if the inflammation reduces, some of my lost vision will return.

Is anyone else suffering from this? What kind of nerve damage treatments have you tried?

discographer
Post 2

@turquoise-- I'm very sorry to hear that. Optic glioma is a tumor that has developed near the optic nerves. It's a rare tumor, but almost always occurs in children. It can lead to partial or total blindness because it damages the optic nerves.

The good news is that optic gliomas grow slowly. Removing the tumor can stop the damage but surgery in this part of the brain is never easy and carries a lot of risks. I hope that your niece will have a successful treatment.

turquoise
Post 1

What is an optic glioma? I just found out that my niece has optic nerve damage and partial blindness due to an optic glioma. What does this mean?

Post your comments

Post Anonymously

Login

username
password
forgot password?

Register

username
password
confirm
email