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| {{Infobox_Disease |
| | #redirect[[Amaurosis fugax]] |
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| '''Amaurosis''' (Greek meaning ''darkening'', ''dark'', or ''obscure'') is [[vision loss]] or weakness that occurs without an apparent lesion affecting the [[eye]] [http://www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_a_27zPzhtm]. It may result from either a medical condition or from excess acceleration, as in flight. The term is the same as the [[Latin language|Latin]] ''gutta serena''.
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| ==Types==
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| [[Leber's congenital amaurosis]] is an inherited disease resulting in severe vision loss or blindness that was first described by Theodore Leber in the 19th century.
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| [[Amaurosis fugax]] (Latin: ''fugax'' meaning ''fugitive'') is a temporary [[loss of vision]] in one eye caused by decreased [[blood flow]] ([[ischemia]]) to the [[retina]]. Another cause is the presence of emboli located in the ipsilateral(same side) [[internal carotid artery]]. It is a type of [[transient ischaemic attack]] ([[TIA]]). Those experiencing Amaurosis usually experience complete symptom abeyance within a few minutes. In a small minority of those who experience Amaurosis, [[stroke]] or [[vision loss]] has resulted. [[Diabetes]], [[hypertension]] and smoking are factors known to increase the risks of suffering this condition. It also can be the result of surgical repair to the [[mitral valve]], when very small emboli may break away from the site of the repair, while the patient's tissue grows to cover the plastic Annuloplasty band. | |
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| This condition can also occur in ruminants suffering from a [[vitamin B1]] ([[Thiamin]]) deficiency due to '''Thiamine-Related Cerebrocortical Necrosis (CCN)'''.
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| ==Management==
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| Those experiencing amaurosis are usually advised to consult a [[physician]] immediately as any form of [[vision loss]], even if temporary, is a [[symptom]] that may indicate the presence of a serious ocular or systemic problem.
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| [[zh:黑蒙]]
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| [[Category:Ophthalmology]]
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| [[Category:Neurology]]
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| [[Category:Signs and symptoms]]
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