September 2023
Volume 23, Issue 11
Open Access
Optica Fall Vision Meeting Abstract  |   September 2023
Poster Session: Spatial-frequency-selective enhancement of visual sensitivity from saccade dynamics
Author Affiliations
  • Yuanhao H. Li
    University of Rochester
  • Michele A. Cox
    University of Rochester
  • Janis Intoy
    University of Rochester
  • Jonathan Victor
    Feil Family Brain and Mind Research Institute, Weill Cornell Medical College
  • Bin Yang
    University of Rochester
  • Zhetuo Zhao
    University of Rochester
  • Michele Rucci
    University of Rochester
Journal of Vision September 2023, Vol.23, 58. doi:
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      Yuanhao H. Li, Michele A. Cox, Janis Intoy, Jonathan Victor, Bin Yang, Zhetuo Zhao, Michele Rucci; Poster Session: Spatial-frequency-selective enhancement of visual sensitivity from saccade dynamics. Journal of Vision 2023;23(11):58.

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

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Eye movements transform a spatial scene into luminance modulations on the retina. Recent work has shown that this transformation is highly structured: within human temporal sensitivity, saccades deliver power that increases in proportion to spatial frequency (SF) up to a critical frequency and remains constant beyond that. Importantly, the critical SF increases with decreasing amplitude. Therefore, at sufficiently low SFs, larger saccades effectively deliver stronger input signals to the retina. Here we tested whether this input reformatting has the predicted perceptual consequences, by examining how large and small saccades (6o & 1o) affect contrast sensitivity. We measured relative sensitivity at two SFs: a reference (0.5 cpd), equal to the critical SF for the small saccade, and a probe at either a lower or higher SF (0.1/2.5 cpd). We predicted that large saccades enhance visibility only when the probe has a lower SF than the reference. Subjects (N=7) made instructed saccades while presented with a plaid of overlapping orthogonal gratings at the two SFs and reported which grating was more visible. Results closely follow theoretical predictions: psychometric functions following small and large saccades only differed with the lower SF probe, in which case the larger saccade significantly enhanced visibility. In sum, saccades enable selectivity not only in the spatial domain, but also in the spatial-frequency domain.

 Funding: Funding: This work was supported by Meta Reality Labs and National Institutes of Health grants EY018363 (MR) and EY07977 (JV).

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