Journal of clinical neuro-ophthalmology
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J Clin Neuroophthalmol · Dec 1992
Review Case ReportsIsolated bilateral abducens nerve palsies caused by the rupture of a vertebral artery aneurysm.
We report two cases with isolated bilateral abducens nerve palsies due to the rupture of a vertebral aneurysm. Surgery revealed that the aneurysm did not directly compress the abducens nerve. ⋯ In view of the clinical and operative findings, it may be regarded as a compression and/or stretching of the bilateral abducens nerves by a thick clot in the prepontine cistern, and not as a manifestation of the raised intracranial pressure. The mechanisms of the isolated abducens nerve palsy are discussed.