Vergence adaptation in clinical vergence testing

Optometry : Journal of the American Optometric Association
Catherine McDaniel, Nick Fogt

Abstract

The purposes of this investigation were to determine whether vergence adaptation occurs after vergence range testing and vergence facility testing and to determine whether vergence adaptation correlates with the results of these tests. Thirty subjects participated in 3 testing sessions on different days. During each session 1 of the following was tested: base-out prism bar vergences, vergence facility (12 base-out/3 base-in binocular prism flippers for 1 minute), and 5 minutes viewing with 6 prism diopters of base-out prism. Before and after each test, the near phoria was measured using the modified Thorington method. There was no correlation between the amplitude of the vergence ranges and the amplitude of vergence facility. Significant vergence adaptation as indicated by an esophoric shift of approximately 3 prism diopters occurred in all testing sessions. The amplitude of vergence adaptation did not correlate with either the amplitude of the blur vergence range or vergence facility. There was a significant correlation between the amplitude of vergence adaptation and the amplitude of the break vergence range. The lack of correlation between the blur vergence range and the vergence facility is not likely because of vergence ad...Continue Reading

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Citations

Apr 1, 2014·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Hamed Momeni-MoghaddamAbubakr Dehvari
Jul 29, 2016·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Joseph Samuel ConradMarjean Taylor Kulp
Oct 3, 2015·PloS One·Volkhard SchrothWolfgang Jaschinski
Jan 28, 2020·Journal of Binocular Vision and Ocular Motility·Michael C Brodsky
Jun 2, 2017·Scientific Reports·Tara L AlvarezBérangère Granger-Donetti
Feb 20, 2021·Clinical Optometry·Amparo Gil-CasasAinhoa Molina-Martin

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