Coarse-fine Dichotomies in Human Stereopsis

Vision Res. 2009 Nov;49(22):2653-65. doi: 10.1016/j.visres.2009.06.004. Epub 2009 Jun 9.


There is a long history of research into depth percepts from very large disparities, beyond the fusion limit. Such diplopic stimuli have repeatedly been shown to provide reliable depth percepts. A number of researchers have pointed to differences between the processing of small and large disparities, arguing that they are subserved by distinct neural mechanisms. Other studies have pointed to a dichotomy between the processing of 1st- and 2nd-order stimuli. Here we review literature on the full range of disparity processing to determine how well different proposed dichotomies map onto one another, and to identify unresolved issues.

Publication types

  • Review

MeSH terms

  • Animals
  • Depth Perception / physiology*
  • Discrimination, Psychological / physiology
  • Humans
  • Photic Stimulation / methods
  • Psychophysics
  • Sensory Thresholds / physiology
  • Vision Disparity / physiology*
  • Vision, Binocular / physiology
  • Visual Cortex / physiology