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Exercise-Induced Vasospastic Amaurosis Fugax
Arch Ophthalmol. 2002;120:220-222.
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Amaurosis fugax is characterized by a sudden, monocular, painless, temporary
visual loss due to a hypoperfusion of retinal circulation. Some of the more
frequent causes include atheromatous disease of the internal carotid or ophthalmic
artery, vasospasm, optic neuropathies, giant cell arteritis, angle-closure
glaucoma, increased intracranial pressure, orbital compressive disease, a
steal phenomenon, and blood hyperviscosity or hypercoagulability.1 Vasospasm may account for many cases of unknown
cause.1-4
Amaurosis fugax due to exercise-induced vasospasm has been described only
once, in 1989 by Imes and Hoyt.3 They described
6 healthy young adults who experienced visual loss precipitated by exercise.
Three of them had monocular visual loss.
Exercise-induced visual disturbances not due to a hypoperfusion of retinal
circulation include pigmentary glaucoma attacks, which may be painless,5 Uhthoff symptom after optic neuritis,6
and unformed hallucinations secondary to occipital lobe tumors.7
We describe 3 more patients with exercise-induced monocular transient visual
loss, probably caused by vasospasm.
Report of Cases
Case 1
. . . [Full Text of this Article] Case 2 Case 3
Comment
Corresponding author and reprints: Daniel S. Mojon, MD, Department
of Neuro-Ophthalmology and Strabismus, Kantonsspital, 9007 St Gallen, Switzerland
(e-mail: daniel.mojon@kssg.ch).
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