Amaurosis
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Lipothymia
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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''.
==Types==
[[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.
[[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.
This condition can also occur in ruminants suffering from a vitamin B1 (Thiamin) deficiency due to '''Thiamine-Related Cerebrocortical Necrosis (CCN)'''.
==Management==
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.
[[Category:Ophthalmology]]
[[Category:Neurology]]
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