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Depth Perception and Spatial Vision

Depth Perception and Spatial Vision

Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.

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Related Experiment Video

Updated: Feb 17, 2026

Visualizing Visual Adaptation

Visualizing Visual Adaptation

Published on: April 24, 2017

The source of visual size adaptation.

Hang Zeng¹, Sylvia Kreutzer¹, Gereon R Fink^1,2

¹Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Center Jülich, Jülich, Germany.

Journal of Vision

|December 12, 2017

Summary

This summary is machine-generated.

Size adaptation relies on retinal size, not perceived size. This visual system adjustment occurs early in neural processing, before binocular interactions.

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Area of Science:

Visual Neuroscience
Perception Psychology

Background:

Size adaptation adjusts neural responses to visual stimuli.
It can be based on retinal size or perceived size, influenced by factors like distance.

Purpose of the Study:

To determine if size adaptation is based on retinal or perceived size.
Investigate the role of binocular disparity in size adaptation.

Main Methods:

Orthogonally varied physical and perceived stimulus sizes using binocular disparity.
Used polarized 3D glasses and four adaptor types.
Measured adaptation effects and aftereffects.

Main Results:

Adaptation effects were similar for stimuli with identical physical size but different perceived sizes.
Significant aftereffects occurred when stimuli differed in physical size but not perceived size.
Perceived size and binocular disparity did not significantly affect size adaptation.

Conclusions:

Size adaptation is primarily driven by retinal size, not perceived size.
Suggests adaptation occurs at early visual processing stages, like the lateral geniculate nucleus, before binocular integration.