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Topic: Anterior ischemic optic neuropathy

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	Optic nerve - Wikipedia, the free encyclopedia
		The optic nerve is the second of twelve paired cranial nerves but is considered to be part of the central nervous system as it is derived from an outpouching of the diencephalon during embryonic development.
		Optic neuritis is inflammation of the optic nerve.
		Anterior Ischemic Optic Neuropathy is a particular type of infarct that affects patients with an anatomical predisposition and cardiovascular risk factors.
	en.wikipedia.org /wiki/Optic_nerve (876 words)

	eMedicine - Optic Neuropathy, Anterior Ischemic : Article by Brian R Younge, MD (Site not responding. Last check: 2007-10-12)
		Anterior ischemic optic neuropathy (AION) is the most common cause of acute optic neuropathy in older age groups.
		The ischemic spiral is less implicated in the arteritic type of AION, in which the entire ophthalmic arterial circulation to the eye and orbit may be compromised.
		The posterior ciliary arteries feed the optic nerve head, and, despite variable results in animal primate models with ligation of the posterior ciliary arteries, their susceptibility to atherosclerosis and arteriosclerosis in a widespread manner seems to be the underlying cause.
	www.emedicine.com /oph/topic161.htm (3873 words)

	Ischemic Optic Neuropathy
		Optic neuropathy describes abnormalities of the optic nerve that occur as a result of ischemia, toxins, vascular and blood pressure abnormalities, and compression within the orbit.
		Optic neuropathy is divided into anterior, which causes a pale edema of the optic disk, and posterior, in which the optic disk is not swollen and the abnormality occurs between the globe and the optic chiasm.
		Is it an abnormality of the optic nerve?
	www.wkbt.com /global/story.asp?s=1230651 (526 words)

	Untitled Document
		Ischemic optic neuropathy is one of the most common causes of loss of vision in persons past middle age, although younger people can get it as well.
		If the blood supply to the optic nerve is interrupted, it produces ischemia of the optic nerve (technical name, "ischemic optic neuropathy"), and a loss of vision develops.
		Anterior ischemic optic neuropathy (commonly abbreviated to “AION”): This is due to acute ischemia of the front (anterior) part of the optic nerve (also called optic nerve head), which is supplied mainly by the posterior ciliary arteries.
	webeye.ophth.uiowa.edu /dept/AION/2-ION-geninfo.htm (913 words)

	Ischemic Optic Neuropathy
		Anterior Ischemic Optic Neuropathy (AION) is a potentially visually devastating disease that occurs in the middle aged and the elderly.
		A stroke of the optic nerve is caused by ischemia or poor circulation to the blood vessels that supply the front or anterior portion of the optic nerve.
		Ischemic optic neuropathy is one of the most common causes of loss of vision in persons past middle age.
	www.lowvision.org /ischemic_optic_neuropathy.htm (1809 words)

	Non-Arteritic Anterior Ischemic Optic Neuropathy (Site not responding. Last check: 2007-10-12)
		NAION is the most common acute optic nerve disease of the elderly and usually occurs in patients between the ages of 40 and 80 years, although the disease has occurred in younger ages.
		Anterior ischemic optic neuropathy: cup-to-disc ratio and its role in pathogenesis.
		Nonarteritic ischemic optic neuropathy (NAION) is an ischemic disorder of the posterior ciliary artery circulation.
	intranet.opt.uh.edu /rounds/papers/summer1999/deviney.html (2068 words)

	North American Neuro-Ophthalmology Society-Committees (Site not responding. Last check: 2007-10-12)
		This is a small "stroke" in the optic nerve but unlike other strokes is unassociated with weakness, numbness, or loss of speech, nor is there an increased risk of a classic stroke later.
		Because of the decreased optic nerve function, however, the pupils may not react as well when light is directed into the affected eye.
		The anatomy of your optic disc is something you were born with.
	www.nanosweb.org /patient_info/brochures/aion.htm (1174 words)

	[No title] (Site not responding. Last check: 2007-10-12)
		Arteritic AION is a manifestation of the sytemic vasculitis associated with temporal arteritis, also known as giant cell arteritis (GCA).5 Arteritic AION is an ophthalmic emergency because of its potential of causing rapid, bilateral blindness.11 This disease will present with symptoms of headache, jaw claudication, neck pain, fever, malaise, and scalp tenderness.
		Anterior ischemic optic neuropathy: differentiation of arteritic from nonarteritic type and its management.
		Non-Arteritic Anterior Ischemic Optic Neuropathy Corwin A. Brown, BA June 9, 2000 The Disease Pathophysiology: Nonarteritic anterior ischemic optic neuropathy (NAION), also known as anterior ischemic optic neuropathy (AION), is an acute disease of the optic nerve.
	intranet.opt.uh.edu /rounds/papers/summer2000/brown.doc (1551 words)

	Handbook of Ocular Disease Management - ANTERIOR ISCHEMIC OPTIC NEUROPATHY
		The patient with arteritic AION is, on average, 75 years old while the patient with non-arteritic AION is, on average age, 62 years old.
		Anterior ischemic optic neuropathy is caused by infarction of the short posterior ciliary arteries supplying the anterior optic nerve.
		In the case of arteritic AION, these vessels, as well as the ophthalmic and central retinal arteries, are compromised by an idiopathic infiltration of the vessels walls by inflammatory macrophages, lymphocytes, and multinucleate giant cells.
	www.revoptom.com /handbook/sect6a.htm (682 words)

	AION
		Reduced flow of blood to the anterior optic nerve results in ischemia (tissue damage) and infarction (tissue death), as occurs with a brain stroke, but the cause is not usually a thrombus (attached blood clot) or embolus (traveling blood clot) but rather a period of hypotension (low blood pressure).
		The blood supply of the anterior portion of the optic nerve is provided by an artery that is lies deep inside the optic nerve, creating a cup at the disk end.
		Progressive loss of vision in the already affected eye is not very likely, possibly because the death of nerve cells in the affected anterior optic nerve relieves the compression in that optic nerve.
	personal.ecu.edu /wuenschk/AION.htm (2866 words)

	Surgery for nonarteritic anterior ischemic optic neuropathy
		Nonarteritic anterior ischemic optic neuropathy (NAION) is thought to be due to interruption of blood supply to the optic nerve where it enters the eye.
		Decompression of tissue surrounding the optic nerve where it enters the eye aims to limit damage and visual loss by relieving pressure on the nerve.
		Nonarteritic ischemic optic neuropathy is characterized by sudden and painless loss of vision in the eye, accompanied by pallid swelling of the optic disc.
	www.cochrane.org /reviews/en/ab001538.html (545 words)

	Mason Eye Institute - Non-Arteritic Anterior Ischemic Optic Neuropathy (Site not responding. Last check: 2007-10-12)
		A drug used to treat lazy eye also may benefit patients with a nerve condition that causes sudden vision loss, according to research published in the 1996 January issue of the American Journal of Ophthalmology.
		The condition results from a painless swelling of the optic nerve that causes a rapid reduction in vision.
		Risk factors include hypertension, diabetes, a history of fever blisters and a characteristic appearance of the optic nerve that can be recognized by ophthalmologists.
	www.muhealth.org /~ophthalmology/naion.shtml (348 words)

	Surgery for nonarteritic anterior ischemic optic neuropathy (Cochrane Review) (Site not responding. Last check: 2007-10-12)
		Background: Nonarteritic ischemic optic neuropathy is characterized by sudden and painless loss of vision in one eye, accompanied by pallid swelling of the optic disc.
		Although various medical interventions, such as corticosteroids and phenytoin sodium, have been used to treat nonarteritic ischemic optic neuropathy, no therapy has been proven effective.
		Authors' conclusions: Results from the Ischemic Optic Neuropathy Decompression Trial indicate that optic nerve decompression surgery for nonarteritic ischemic optic neuropathy is not effective.
	www.cochrane.org /cochrane/revabstr/ab001538.htm (504 words)

	Anterior Ischemic Optic Neuropathy - Ophthalmology and Visual Sciences, The University of Iowa
		Anterior Ischemic Optic Neuropathy - Ophthalmology and Visual Sciences, The University of Iowa
		Tests and procedures that may be done for patients with AION
		Management of arteritic AION and giant cell arteritis (Figure 10)
	webeye.ophth.uiowa.edu /dept/aion (178 words)

	Arch Ophthalmol -- Viagra and Anterior Ischemic Optic Neuropathy, May 2005, Egan and Fraunfelder 123 (5): 709 (Site not responding. Last check: 2007-10-12)
		Arch Ophthalmol -- Viagra and Anterior Ischemic Optic Neuropathy, May 2005, Egan and Fraunfelder 123 (5): 709
		Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.
		in the possible association with nonarteritic anterior ischemic
	archopht.ama-assn.org /cgi/content/extract/123/5/709-a (139 words)

	eMedicine - Optic Neuropathy, Anterior Ischemic : Article Excerpt by: Brian R Younge, MD (Site not responding. Last check: 2007-10-12)
		eMedicine - Optic Neuropathy, Anterior Ischemic : Article Excerpt by: Brian R Younge, MD (advertisement)
		Synonyms, Key Words, and Related Terms: anterior ischemic optic neuropathy, AION, nonarteritic anterior ischemic optic neuropathy, NAION, arteritic anterior ischemic optic neuropathy, ischemic optic neuropathy, ION, giant cell arteritis, optic atrophy, optic nerve, optic disc
		Please click here to view the full topic text: Optic Neuropathy, Anterior Ischemic
	www.emedicine.com /oph/byname/optic-neuropathy-anterior-ischemic.htm (656 words)

	Arch Ophthalmol -- Tadalafil Associated With Anterior Ischemic Optic Neuropathy, March 2005, Escaravage et al. 123 (3): ...
		Arch Ophthalmol -- Tadalafil Associated With Anterior Ischemic Optic Neuropathy, March 2005, Escaravage et al.
		Non-arteritic anterior ischaemic optic neuropathy and the treatment of erectile dysfunction
		Can erectile dysfunction drug use lead to ischaemic optic neuropathy?
	archopht.ama-assn.org /cgi/content/extract/123/3/399 (170 words)

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