Chapter

Tonic Pupil

Matthew J. Thurtell, Robert L. Tomsak and Robert B. Daroff

in Neuro-Ophthalmology

Published on behalf of Oxford University Press

Published in print October 2011 | ISBN: 9780195390841
Published online April 2013 | e-ISBN: 9780199322893 | DOI: http://dx.doi.org/10.1093/med/9780195390841.003.0032

Series: What Do I Do Now

Tonic Pupil

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A tonic pupil is caused by a lesion affecting the postganglionic parasympathetic innervation of the pupil. It can be an incidental finding on examination or associated with visual symptoms, such as photophobia or blurred vision at near. We discuss the common causes and diagnostic evaluation of a tonic pupil in this chapter.

Chapter.  1123 words. 

Subjects: Neurology

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