How can you tell the difference between AION and NAION?

AAION causes a pallid edema that ultimately resolves leaving significant excavation and atrophy of the disc whereas NAION typically exhibits normal or hyperemic edema that resolves leaving relatively preserved disc substance.

Similarly, What causes NAION eye? What causes NAION to occur? Non-arteritic anterior ischemic optic neuropathy (NAION) is due to impaired circulation of blood to the front of the optic nerve. It is called “non-arteritic” because there is reduced blood flow without true inflammation of the blood vessels (as there is in arteritis).

Then, Does NAION go away?

Visual Prognosis

NAION typically worsens over the course of two weeks before stabilizing, although several studies have demonstrated visual recovery of several lines of acuity in approximately 13-43% of cases. Once optic disc edema resolves, visual acuity generally does not deteriorate any more.

And Is AION unilateral? Visual loss is usually sudden or develops over a few days at most and is commonly unilateral, although second eye involvement may occur later, especially in the arteritic form. The visual loss is usually permanent, with some recovery possibly occurring within the first weeks or months.

Is AION bilateral? 1 Arteritic AION (AAION) is caused by giant cell arteritis, and nonarteritic AION (NAION) is the commonly occurring type and not due to giant cell arteritis. 2 Bilateral AION occurs more often in arteritic patients and bilateral simultaneous NAION is extremely rare.

Can you go blind from NAION?

In particular, he has been performing research on optic nerve stroke, also called non-arteritic anterior ischemic optic neuropathy, or NAION. This disorder can lead to vision loss or even blindness and is the most common cause of sudden optic nerve-related visual loss in older people.

Is NAION an eye stroke?

Diagnosis of NAION

You will undergo a complete eye exam including dilatation of your eyes to examine your optic nerve and retina. Typically in NAION the optic nerve will appear swollen. Your doctor will also carefully assess your symptoms to distinguish NAION from other types of eye stroke.

Can you recover from NAION?


In most cases of NAION, vision worsens progressively over 2 weeks and then remains stable over time. Some studies have shown recovery of 3 lines of acuity or better in 13%87 to 42.7%.

What is AION Ophthalmology?

Anterior ischemic optic neuropathy (AION) is a medical condition involving loss of vision caused by damage to the optic nerve as a result of insufficient blood supply (ischemia).

What TB drug is most likely to cause optic neuritis?

Ethambutol is the most commonly implicated drug. It is generally well tolerated, but known to cause optic neuritis, more specifically retro bulbar neuritis causing blurred vision, decreased visual acuity, central scotomas, and loss of red-green color vision.

Is NAION a disability?

Nonarteritic anterior ischemic optic neuropathy (NAION) is one of the most widespread visually disabling diseases in the middle-aged and elderly population, although no age is immune.

Can you fly with NAION?

No cases of NAION have been reported to occur during flight. CASE REPORT: A 41-yr-old male pilot presented with vision change while performing high G-force maneuvers in an A10 fighter jet. He developed a paracentral visual field defect superiorly in the left eye. Contrasted MRI was within normal limits.

How is NAION diagnosed?

While no specific laboratory studies can confirm a diagnosis of NAION, an erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) should be ordered for any older patient for whom the diagnosis is uncertain and the possibility of giant cell arteritis exists.

Can NAION be reversed?

The truth is that non-arteritic ischemic optic neuropathy typically cannot be cured. NAION treatment focused around controlling blood pressure and reducing the symptoms that caused it and preventing it from damaging the other eye.

How do you know if TB treatment is working?

After taking TB medicine for several weeks, a doctor will be able to tell TB patients when they are no longer able to spread TB germs to others. Most people with TB disease will need to take TB medicine for at least 6 months to be cured.

What diseases cause optic nerve damage?

Glaucoma is a group of diseases that are the leading cause of blindness in the United States. Glaucoma usually happens when the fluid pressure inside the eyes slowly rises and damages the optic nerve. Optic neuritis is an inflammation of the optic nerve.

How do you treat damaged optic nerves?

Unfortunately, once damaged, the optic nerve cannot be repaired since the damage is irreversible. The optic nerve is composed of nerve fibers that do not possess the ability to regenerate on their own. The nerve fibers, if damaged, cannot heal on their own.

Can you drive if you are blind in one eye?

If you only have vision in one eye, you can still drive a noncommercial vehicle in all 50 states and the District of Columbia. However, to drive a noncommercial vehicle, you must still pass an eye exam, and prove that you have adequate peripheral vision for driving.

Is blind in one eye a disability?

Because being legally blind is measured by your “best” eye, that means that you likely are not considered disabled if you are only blind in one eye.

Can you drive with optic neuropathy?

Advice on papillitis or optic neuritis

The patient with optic neuritis must not drive. The resolution of the causal clinical condition will force to evaluating the patient for possible visual sequels, and with a medical report before permitting driving.

Does Viagra cause NAION?

Extensive European epidemiologic and global clinical trial data suggest that there is no increased incidence of NAION associated with sildenafil use.

Can NAION affect both eyes?

NAION typically affects one eye, although the other eye sometimes suffers similar loss months or years later (about a 15% risk of second eye involvement within 5 years). If there is sudden severe blood loss or severe and prolonged drop in blood pressure, both eyes may be affected together.

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