August 2023
Volume 23, Issue 9
Open Access
Vision Sciences Society Annual Meeting Abstract  |   August 2023
Occluding one eye during fixation increases wandering of both eyes
Author Affiliations
  • Scott N.J. Watamaniuk
    Wright State University
    The Smith-Kettlewell Eye Research Institute
  • Stephen J. Heinen
    The Smith-Kettlewell Eye Research Institute
  • Devashish Singh
    The Smith-Kettlewell Eye Research Institute
  • Arvind Chandna
    The Smith-Kettlewell Eye Research Institute
Journal of Vision August 2023, Vol.23, 5670. doi:
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Scott N.J. Watamaniuk, Stephen J. Heinen, Devashish Singh, Arvind Chandna; Occluding one eye during fixation increases wandering of both eyes. Journal of Vision 2023;23(9):5670.

      Download citation file:

      © ARVO (1962-2015); The Authors (2016-present)

  • Supplements

Hering’s Law states that the eyes rotate as a unit, driven by a single command for both vergence and conjugate movements. Previously we presented evidence against the integrity of Hering’s Law for vergence during smooth pursuit of a midline target (Chandna et al., 2021). Here we provide evidence that the eyes are also not yoked during fixation. Binocular eye movements were recorded while eight observers fixated the center of a small “X” during either binocular viewing, or with one eye occluded with an infrared-pass filter. Results show greater position variability of the occluded eye than the viewing eye quantified with the bivariate contour ellipse area (BCEA). This difference is due to increased drift speed and excursion in the occluded eye. Microsaccades were all conjugate, and their rate and frequency did not differ between the eyes, nor between the binocular and monocular conditions. Surprisingly, the BCEA of the viewing eye during monocular viewing was also larger than the BCEA of either eye during binocular viewing. This result suggests that visual information from the covered and viewing eyes interact perceptually to guide the eyes when visual input is degraded. Overall, the results suggest that drift during fixation is controlled independently while microsaccades remain conjugate, consistent with our binocular control model comprising independent and conjugate channels.


This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.