Non Arteritic Ischemic Optic Neuropathy Causes
Anterior involvement is common with both arteritic and nonarteritic ischemic optic neuropathy. Naion stands for non arteritic anterior ischemic optic neuropathy and is the most common cause of acute optic nerve injury in individuals 50 years or older.
Full Text Nonarteritic Anterior Ischemic Optic Neuropathy Cause
It is an idiopathic ischemic insult of the optic nerve head characterized by acute monocular painless visual loss with optic disc swelling.
Non arteritic ischemic optic neuropathy causes. Posterior ischemic optic neuropathy pion encompasses those conditions that result in ischemia to any portion of the optic nerve posterior to the optic disc. Nonarteritic anterior ischemic optic neuropathy naion is the most common form of ischemic optic neuropathy. Nonarteritic aion na aion is caused by reasons other than inflammation of the arteries.
In people with nonarteritic ischemic optic neuropathy treatment involves controlling blood pressure diabetes and other risk factors for atherosclerosis. It is called non arteritic because there is reduced blood flow without true inflammation of the blood vessels as there is in arteritis. By definition pion will not cause disc edema.
Other causes such as blood clotting disorders and obstructive sleep apnea may also require treatment pedie does you son have atherosclerosis. Anterior ischemic optic neuropathy aion is a sudden loss of vision. Think of the optic nerve as the video cable connecting your eye which is like an ultra sophisticated camera to the brain which processes the signals from the eye to create your vision.
There are two types of aion. Non arteritic anterior ischemic optic neuropathy naion is due to impaired circulation of blood to the front of the optic nerve. Arteritic aion a aion is caused by inflammation of arteries supplying blood to the optic nerve.
The first is non arteritic naion and the second is arteritic aaion and is almost always associated with giant cell arteritis.
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