Dynamic stereoacuity: A comparison of electrophysiological and psychophysical responses in normal and stereoblind observers

Gung Mei Chao, J. Vernon Odom, Daniel Karr

Research output: Contribution to journalArticle

10 Scopus citations


We compared stereoscopic thresholds determined psychophysically and by using visually evoked potentials in normal adult and stereoblind subjects. For normal observers there was a strong linear relationship between visual evoked potential amplitude and disparity (r = 0.86 on average). However, stereoblind observers' responses showed no relationship to disparity (r = 0.18 on average). For normal observers, log visual evoked potential stereo thresholds determined by an extrapolation procedure were on average within 0.17 octaves of the psychophysically determined log thresholds. They did not differ significantly from psychophysical thresholds, and they correlated significantly with behavioral thresholds (r = 0.86).

Original languageEnglish (US)
Pages (from-to)45-58
Number of pages14
JournalDocumenta Ophthalmologica
Issue number1
Publication statusPublished - Sep 1988
Externally publishedYes



  • depth perception
  • dynamic stereoacuity
  • motion-in-depth threshold
  • stereoblind
  • stereopsis

ASJC Scopus subject areas

  • Ophthalmology

Cite this