Speed and accuracy of saccades, vergence and combined eye movements in subjects with strabismus before and after eye surgery

Vision Research
Maria Pia BucciZoï Kapoula

Abstract

The purpose of the study was to examine spatio-temporal characteristics of horizontal eye movements in the natural space (saccade, vergence and combined movements) in young subjects with early onset convergent or divergent strabismus. Nine young subjects (8-20 years old) were tested: three with divergent strabismus, six with convergent strabismus. A standard paradigm was used to elicit pure horizontal saccades at far and at close viewing distance, pure vergence along the median plane (convergence and divergence) and saccades combined with vergence movements. Horizontal eye movements from both eyes were recorded by a photoelectric device. Eye movements were recorded before surgery, and, for the majority of the subjects, two times after surgery. Before surgery the accuracy of convergence and divergence movements in their pure or combined form was poor with respect to normal values. The mean velocity of convergence was also abnormally slow. Strabismus surgery improved significantly the accuracy of these types of eye movements. The speed of pure convergence and of divergence combined movements increased significantly after surgery. We concluded that poor vergence eye movement's performance, particularly those found for convergence ...Continue Reading

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Citations

Jun 24, 2010·Journal français d'ophtalmologie·P Quercia
Jul 20, 2011·Neuroscience Letters·Agathe LegrandMaria Pia Bucci
Dec 17, 2014·Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus·Anna M Horwood, Patricia M Riddell
Apr 26, 2016·Neuroscience Letters·Anna DickmannIrene Aprile
Oct 22, 2016·Journal français d'ophtalmologie·B ClotucheJ Strenk
Sep 9, 2016·Journal of Neurophysiology·John R EconomidesJonathan C Horton
Apr 14, 2017·Journal of Neurophysiology·Mark M G WaltonKristina Tarczy-Hornoch
May 24, 2020·Investigative Ophthalmology & Visual Science·Adam Pallus, Mark M G Walton
Jul 15, 2021·Scientific Reports·Talora L MartinFatema F Ghasia
Sep 30, 2021·Seminars in Ophthalmology·Ken KakeueAtsushi Hayashi

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