Aetiology
- occlusive arterial disease
- atherosclerosis or other lesions of the internal carotid artery (eg spontaneous dissection)
- cardiac thromboemboli
- arteritis
- reduced perfusion pressure
- postural hypotension
- multiple occlusions of extracranial cerebral arteries
- arteriovenous fistula
- intracranial hypertension
- glaucoma
- increased resistance to retinal perfusion
- malignant hypertension
- migraine
- increase in blood viscosity
- vasospasm
- miscellaneous causes
- blowing the nose
- sensitivity to cold
- malaria
- acute sharp pain
- malaria
- paraneoplastic retinopathy
- interleukin-2
- idiopathic
Atherosclerosis is the cause of amaurosis fugax in probably less than half the patients.
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