Abnormal eye movements are increasingly recognised in patients with amyotrophic lateral sclerosis (ALS) and, when they occur, may provide insights into the pattern and pathogenesis of the disease process. In patients with disorders that mimic ALS, abnormal eye movements may point to the correct diagnosis. In both of these circumstances, systematic examination of eye movements and interpretation of the findings with reference to modern concepts of their neural substrate will aid diagnosis and suggest pathogenesis. Here, key points with illustrative case histories and eye movement records are highlighted.
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This paper is dedicated to the memory of Dr J Mark Gibson who died on the 27th September 2010.
Funding Supported by NIH grant EY06717, Department of Veterans Affairs, and Evenor Armington Fund (RJL). The funding sources had no role in the writing of this review.
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.