A (fascinating) litmus test for human retino- vs. non-retinotopic processing

Marco Boi*, Haluk Ogmen, Joseph Krummenacher, Thomas U. Otto, Michael H. Herzog

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

In human vision, the optics of the eye map neighboring points of the environment onto neighboring photoreceptors in the retina. This retinotopic encoding principle is preserved in the early visual areas. Under normal viewing conditions, due to the motion of objects and to eye movements, the retinotopic representation of the environment undergoes fast and drastic shifts. Yet, perceptually our environment appears stable suggesting the existence of non-retinotopic representations in addition to the well-known retinotopic ones. Here, we present a simple psychophysical test to determine whether a given visual process is accomplished in retino- or non-retinotopic coordinates. As examples, we show that visual search and motion perception can occur within a non-retinotopic frame of reference. These findings suggest that more mechanisms than previously thought operate non-retinotopically. Whether this is true for a given visual process can easily be found out with our "litmus test."

Original languageEnglish
Article number5
Number of pages11
JournalJournal of Vision
Volume9
Issue number13
DOIs
Publication statusPublished - 2009

Keywords

  • non-retinotopic processing
  • visual stability
  • grouping
  • SACCADIC EYE-MOVEMENTS
  • VISUAL-CORTEX
  • HUMAN VISION
  • MOTION
  • INTEGRATION
  • ORGANIZATION
  • INFORMATION
  • ADAPTATION
  • PERCEPTION
  • ATTENTION

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