Interocular suppression in normal and amblyopic vision: spatio-temporal properties

Pi-Chun Huang, Daniel Baker, Robert F. Hess

Research output: Contribution to journalArticle

Abstract

We measured the properties of interocular suppression in strabismic amblyopes and compared these to dichoptic masking in binocularly normal observers. We used a dichoptic version of the well-established probed-sinewave paradigm that measured sensitivity to a brief target stimulus (one of four letters to be discriminated) in the amblyopic eye at different times relative to a suppression-inducing mask in the fixing eye. This was done using both sinusoidal steady state and transient approaches. The suppression-inducing masks were either modulations of luminance or contrast (full field, just overlaying the target, or just surrounding the target). Our results were interpreted using a descriptive model that included contrast gain control and spatio-temporal filtering prior to excitatory binocular combination. The suppression we measured, other than in magnitude, was not fundamentally different from normal dichoptic masking: lowpass spatio-temporal properties with similar contributions from both surround and overlay suppression.
Original languageEnglish
Article number29
Pages (from-to)1-12
Number of pages12
JournalJournal of Vision
Volume12
Issue number11
DOIs
Publication statusPublished - 31 Oct 2012

Bibliographical note

Creative Commons Attribution Non-Commercial No Derivatives License

Keywords

  • interocular suppression
  • amblyopia
  • dichoptic masking
  • dynamic

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