What is optic nerve pallor?

What is optic nerve pallor?

Optic atrophy is a sign and typically is noted as optic nerve pallor. This is the end stage of a process resulting in optic nerve damage. Because the optic nerve fiber layer is thinned or absent the disc margins appear sharp and the disc is pale, probably reflecting absence of small vessels in the disc head.

What is bilateral optic neuropathy?

Optic neuropathy is a catch-all term that refers to damage inflicted on the optic nerve in your eye. This is the nerve in the back of the eyeball that transfers visual information from your eye to the brain, allowing you to see. This condition is one that gets worse over time, when not treated.

What causes optic disc pallor and edema?

Causes of optic nerve swelling. The most common causes of optic nerve swelling are non-arteritic anterior ischaemic optic neuropathy (35%), optic neuritis (31%) and intracranial pathology (14%).

Can a pale optic nerve be normal?

Sometimes the optic nerve can transition from being normal and healthy to having a pale/atrophic appearance. This is referred to as primary optic atrophy.

What is bilateral disc pallor?

It refers to pallor of the optic disc which results from irreversible damage to the retinal ganglion cells and axons. The axons of the retinal ganglion cells make up the optic nerve and continue onto the optic chiasm, optic tract and up to the lateral geniculate body before they synapse.

What are symptoms of optic nerve damage?

Eye and vision symptoms of optic nerve damage

  • Abnormal pupil size and nonreactivity to light.
  • Bulging of the eyes.
  • Complete or partial loss of vision.
  • Diminished ability to see fine details.
  • Diminished color vision or colors seem faded.
  • Dimming or blurring of vision.
  • Double vision.
  • Eye redness.

What causes bilateral optic neuropathy?

Optic neuropathy can be caused by demyelination, inflammation, ischemia, infiltration, compression, and hereditary and toxic/nutritional causes. Careful clinical evaluation is essential to rule in the diagnosis of optic neuropathy.

Is bilateral optic neuropathy progressive?

The inherited optic neuropathies typically manifest as symmetric bilateral central visual loss. Optic nerve damage in most inherited optic neuropathies is permanent and progressive.

What causes optic nerve pallor?

The optic disc pallor may be diffuse or segmental (sectoral). Segmental pallor occurs if part of the blood supply to the optic nerve is occluded, and It will be associated with an appropriate altitudinal field defect. An important treatable cause of ischaemic optic neuropathy is giant cell arteritis (GCA).

What causes bilateral optic nerve swelling?

Lyme disease, cat scratch disease, and syphilis can all directly cause bilateral optic disc swelling due to infiltration whereas viruses can often precede optic neuritis. Inflammatory culprits such as giant cell arteritis or neurosarcoidosis may also lead to bilateral optic disc edema.

What causes pallor of optic nerve?

What causes temporal pallor?

Diffuse or temporal pallor is often nonspecific though commonly seen in nutritional, toxic, and hereditary optic neuropathies. Associated cupping is present in methanol toxicity. Sectoral pallor is typically seen following an acute optic disc swelling in patients with non -arteritic ischemic optic neuropathy.

What causes pallor of the optic nerve head?

Optic atrophy, pallor of the optic nerve head, is a sign found in patients with visual loss due to pathology of the optic nerve or retinal ganglion cells. There are many causes. This article discusses the differential diagnosis of optic atrophy. Open in a separate window Examining the optic disc with a 90D lens at the slit lamp. NIGERIA

What does it mean to have optic disc pallor?

Optic disc pallor means that optic nerve axons have been damaged in variety of disorders.

What does it mean to have optic nerve atrophy?

Optic atrophy is a sign and typically is noted as optic nerve pallor. This is the end stage of a process resulting in optic nerve damage. Because the optic nerve fiber layer is thinned or absent the disc margins appear sharp and the disc is pale, probably reflecting absence of small vessels in the disc head.

What causes optic nerve damage in the elderly?

Certain disc appearances can help to determine the cause for the optic nerve damage. Sector disc pallor in an older individual could have been caused by NAION. Severe optic atrophy with gliosis again in an elderly person could have been due to giant cell arteritis.