What is Optical Chiasma?
Optical chiasma is a term used to describe the abnormal formation of cells in the optic nerve. It refers to a group of cells which are not normal for any reason. These abnormal cells may be due to genetic factors or environmental influences. They can be found throughout the body but they most commonly occur in the central nervous system (CNS).
The optic nerve is a long branch of the spinal cord that supplies the eyes with visual input. It carries sensory information from one part of the brain to another and then back again. The optic nerve contains several branches called fibers. Each fiber consists of specialized cells called neurons, which communicate with each other through chemical signals. These signals carry information about light intensity and direction to the brain’s visual cortex where it is processed into images and sensations.
There are two types of optic nerve fibers: those that run directly from the retina to the brain and those that travel along the optic canal. The optic nerves are divided into two main groups: peripheral and central.
Permanent Damage to the Optic Nerve Can Occur Without Any Symptoms at All
In order for an injury to cause permanent damage, there must be some sort of physical trauma or other abnormality occurring in both parts of the nerve. In most cases, the cause of this is a head injury, but it can also be caused by infection or the build-up of certain toxins in the nerve. The first symptom of severe damage to the optic nerve is typically partial vision loss in one eye. As the nerve slowly dies over time, more of these symptoms will begin to appear.
This condition can also lead to other serious complications if left untreated for a long time. Other symptoms that are common in this condition include pain behind the eyeball, double vision, and a loss of color perception. If you begin to experience any of these problems, it is important that you see a medical professional immediately. Without treatment, complete blindness can occur within three months of the first appearance of adverse symptoms.
If there is physical trauma involved, the nerve can be repaired if treated within a few hours of the injury. There is also a chance that vision can be restored if it is treated within a few days of the injury. Once the nerve has been damaged for more than a few days, however, there is no chance of repairing the physical damage. It is still possible to restore some of your vision with visual rehabilitation therapy.
What to do if you Suspect you are Suffering from an Optic Nerve Issue?
If you think that you are suffering from an injury or an illness that may be affecting the health of your optic nerve, it is important that you seek medical attention right away. You should make an appointment with an ophthalmologist or an eye doctor as soon as possible. It is also a good idea to call ahead of time so that they can do any testing that may be necessary before you arrive.
The eye doctor will check your eyes to see what kind of problems you may be having with your vision. They will also thoroughly examine the back of your eyes and your optic nerve to see if they notice any damage or abnormalities. The eye doctor will then be able to give you a more accurate prognosis based on what they have found during their examination.
Surgical intervention is usually not required and medical treatment has proven to be very effective in the majority of cases. The best course of action is prevention, however, so it is important to practice safe behaviors that will minimize the risk of head injury such as wearing a seat belt when driving or riding in a car, wearing a helmet when engaging in potentially dangerous recreational activities, and ensuring that children are always properly supervised and wearing appropriate protective gear when engaging in similar activities.
Sources & references used in this article:
Relearning tests for interocular transfer following division of optic chiasma and corpus callosum in cats. by RW Sperry, JS Stamm, N Miner – Journal of Comparative and …, 1956 – psycnet.apa.org
The blood vessels of the human optic chiasma and their relation to those of the hypophysis and hypothalamus by BH Dawson – Brain, 1958 – Citeseer
Origin of the retina from both sides of the embryonic brain: a contribution to the problem of crossing at the optic chiasma by M Jacobson, G Hirose – Science, 1978 – science.sciencemag.org