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Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition

Published on: July 21, 2020

Motion transparency: depth ordering and smooth pursuit eye movements.

Alexander C Schütz¹

¹Abteilung Allgemeine Psychologie, Justus-Liebig-Universität, Giessen, Germany. alexander.c.schuetz@psychol.uni-giessen.de

Journal of Vision

|December 30, 2011

Summary

Surface features influence depth perception when transparent surfaces move. More dots, slower speeds, and non-adapted motion bias perception towards surfaces being in the back.

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Area of Science:

Visual perception
Neuroscience
Computational vision

Background:

Ambiguity in depth ordering arises with overlapping, transparent surfaces moving in different directions.
The specific surface features guiding this depth perception remain largely uncharacterized.

Purpose of the Study:

To investigate how surface features affect perceived depth order.
To examine the influence of these features on smooth pursuit eye movements.

Main Methods:

Participants viewed overlapping transparent surfaces with varying dot density, speed, and motion direction relative to adaptation.
Perceived depth order was reported, and smooth pursuit eye movements were tracked.

Main Results:

Surfaces with more dots, slower speeds, or motion opposite to adaptation were perceived as being in the back.
Initial smooth pursuit favored surfaces with more dots, faster speeds, and non-adapted motion.
Smooth pursuit eye movements adjusted to perceived depth after 300-500 ms.

Conclusions:

Perceived depth order is not solely dictated by smooth pursuit eye movements, as indicated by initial pursuit preferences and slow adjustment.
Global motion strength, influenced by dot number and motion adaptation, can bias perception, favoring stronger motion to be perceived in the back.