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

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

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

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
JournalJournal of Vision
Volume12
Issue number11
DOIs
Publication statusPublished - 2012

All Science Journal Classification (ASJC) codes

  • Ophthalmology
  • Sensory Systems

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