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Case Reports in Medicine
Volume 2009, Article ID 970502, 3 pages
Case Report

Tonic Pupil Following Pars Plana Vitrectomy and Endolaser

1The Institute of Ophthalmology and Visual Science, New Jersey Medical School (NJMS), NJ 07101, USA
2Department of Neurology and Neurosciences, New Jersey Medical School (NJMS), NJ 07101, USA

Received 27 February 2009; Accepted 18 June 2009

Academic Editor: Thomas Richard Friberg

Copyright © 2009 Benyamin Ebrahim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Tonic pupil was observed in a 67 year-old patient following a retinal detachment repair with pars plana vitrectomy, endolaser and silicone oil tamponade performed under retrobulbar anesthesia. The probable location of disturbance is the postganglionic parasympathetic fibers in the short ciliary nerves along their course to the pupil in the suprachoroidal space. A likely explanation for this phenomenon is injury to short ciliary nerves by endolaser treatment.