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  2. Optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Optic_neuropathy

    The optic nerve can be damaged when exposed to direct or indirect injury. Direct optic nerve injuries are caused by trauma to the head or orbit that crosses normal tissue planes and disrupts the anatomy and function of the optic nerve; e.g., a bullet or forceps that physically injures the optic nerve.

  3. Non-arteritic anterior ischemic optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Non-arteritic_anterior...

    The exact mechanism of optic nerve ischemia in these cases remains unclear, but contributing factors may include hypotension, anemia, hypoxia, and changes in the autoregulation of optic nerve arterial blood flow. The incidence of ischemic optic neuropathy leading to vision loss following general surgeries ranges between 0.1% and 0.002%.

  4. Ischemic optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Ischemic_optic_neuropathy

    Ischemic optic neuropathy (ION) is the loss of structure and function of a portion of the optic nerve due to obstruction of blood flow to the nerve (i.e. ischemia).Ischemic forms of optic neuropathy are typically classified as either anterior ischemic optic neuropathy or posterior ischemic optic neuropathy according to the part of the optic nerve that is affected.

  5. Anterior ischemic optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Anterior_ischemic_optic...

    The optic nerve is the bundle of axons that carry the visual signals from the eye to the brain. This optic nerve must penetrate through the wall of the eye, and the hole to accommodate this is usually 20-30% larger than the nerve diameter. In some patients the optic nerve is nearly as large as the opening in the back of the eye, and the optic ...

  6. Toxic and nutritional optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Toxic_and_nutritional...

    Toxic and nutritional optic neuropathy is a group of medical disorders defined by visual impairment due to optic nerve damage secondary to a toxic substance and/or nutritional deficiency. The causes of these disorders are various, but they are linked by shared signs and symptoms.

  7. Posterior ischemic optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Posterior_ischemic_optic...

    The anterior optic nerve receives blood primarily from the posterior ciliary arteries. The anterior optic nerve, a.k.a. the optic nerve head, is surrounded by the scleral canal, and is vulnerable to crowding of nerve fibers. The portion of the optic nerve head that is visible by looking into the eye with an ophthalmoscope is called the optic disc.

  8. Signs and symptoms of multiple sclerosis - Wikipedia

    en.wikipedia.org/wiki/Signs_and_symptoms_of...

    Individuals experience rapid onset of pain in one eye followed by blurry vision in part or all its visual field. Flashes of light may also be present. [91] Inflammation of the optic nerve causes loss of vision most usually by the swelling and destruction of the myelin sheath covering the optic nerve.

  9. Chronic relapsing inflammatory optic neuropathy - Wikipedia

    en.wikipedia.org/wiki/Chronic_relapsing...

    A chest X-ray or CT scan should be ordered if granulomatous optic neuropathy caused by sarcoidosis is suspected. [ 3 ] Magnetic resonance imaging can capture optic nerve inflammation, but this finding is not present in all patients, [ 1 ] [ 3 ] [ 13 ] Diffusion tensor imaging has been shown to detect widespread white matter abnormalities in ...

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