ischemic optic neuropathy การใช้

• Anterior ischemic optic neuropathy ( AION ) is a potential complication.
• The most common etiology is multiple sclerosis or ischemic optic neuropathy ( Blood Clot ).
• In ischemic optic neuropathies, there is insufficient blood flow ( ischemia ) to the optic nerve.
• The operation, called optic nerve decompression surgery, is meant to treat nonarteritic anterior ischemic optic neuropathy, or NAION.
• In 76 % of cases involving the eye, the ophthalmic artery is involved causing arteritic anterior ischemic optic neuropathy.
• However, cases of acute optic neuropathy ( specifically anterior ischemic optic neuropathy ) have also been reported to occur.
• Nonarteritic anterior ischemic optic neuropathy ( NAION ) is an isolated white-matter stroke of the optic nerve ( ON ).
• Anterior Ischemic Optic Neuropathy is commonly known as " stroke of the optic nerve " and affects the optic nerve head.
• Ischemic optic neuropathies are classified based on the location of the damage and the cause of reduced blood flow, if known.
• Beyond this introduction, this article will focus on non-arteritic AION . For a discussion on arteritic AION see the separate article arteritic anterior ischemic optic neuropathy.
• The eye condition, known as non-arteritic ischemic optic neuropathy, comes on so suddenly that those affected by it often awake with their vision gone in one eye.
• Anterior ischemic optic neuropathy ( AION ) is distinguished from PION by the fact that AION occurs spontaneously and unilaterally in patients with predisposing anatomy and cardiovascular risk factors.
• An exhaustive review article published in March 2009 described the latest information on arteritic and non-arteritic ischemic optic neuropathy, both anterior ( A-AION and NA-AION ) and posterior ( A-PION, NA-PION, and surgical ).
• "' Posterior ischemic optic neuropathy "'( "'PION "') is a medical condition characterized by damage to the retrobulbar portion of the optic nerve due to ischemia, a restriction of the blood supply to the optic nerve.
• Though the term " AION " can be used to describe either anterior ischemic optic neuropathy in general or non-arteritic AION specifically, in this article " NAION " henceforth will be used to refer to non-arteritic anterior ischemic optic neuropathy.
• By far, the three most common injuries to the optic nerve are from glaucoma, optic neuritis ( especially in those younger than 50 years of age ), and anterior ischemic optic neuropathy ( usually in those older than 50 ).
• Though the term " AION " can be used to describe either anterior ischemic optic neuropathy in general or non-arteritic AION specifically, in this article " NAION " henceforth will be used to refer to non-arteritic anterior ischemic optic neuropathy.
• It is useful for finding evidence corroborating the diagnosis of glaucoma and other optic neuropathies, optic neuritis, anterior ischemic optic neuropathy or papilledema ( i . e . optic disc swelling produced by raised intracranial pressure ), and optic disc drusen.
• Despite the term " posterior ", this form of ischemic optic neuropathy also includes cases where the ischemic damage is anterior, as the condition describes a particular mechanism of visual loss as much as the location of damage in the optic nerve.
• She has led clinical trials, for example she was principal investigator of two federally funded multicenter randomized trials, the data center for the Ischemic Optic Neuropathy Decompression Trial ( IONDT ) and the Surgical Treatments Outcomes Project for Dysfunctional Uterine Bleeding ( STOP-DUB ).