Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Visual Agnosia

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...

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.

Spanning Openings in Brick Walls

Spanning Openings in Brick Walls

In brick wall construction, supporting structures are crucial for openings like windows and doors to maintain the integrity and support the weight of the wall above. These supports include lintels, corbels, and arches, each serving specific structural purposes.
Lintels are primary supports used to span openings and can be crafted from materials such as reinforced concrete, steel-reinforced brick masonry, or simple steel angles. These are straightforward to install and are typically concealed...

Design Example: Marking Boundaries of a Site Using a Compass

Design Example: Marking Boundaries of a Site Using a Compass

Marking site boundaries using a compass is a precise surveying technique that ensures the accuracy of boundary delineation. The process begins by using provided site details, including the bearings and lengths of each boundary line. The initial step involves calculating latitudes and departures for all sides of the site. This computation verifies that the traverse is free of errors, ensuring a closed and accurate boundary.The process starts at a known point, such as Point A, which is often...

Visual System

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...

Plastic Deformations

Plastic Deformations

Plastic deformation represents a fundamental concept in materials science, which explains the irreversible change in the shape of a material when it experiences stress beyond its elastic capability. This phenomenon is important in structural engineering, especially in designing and analyzing cantilever beams—structures that are securely fixed at one end and bear loads at the opposite end. When these beams are subjected to loads within their elastic range, they will return to their original...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Associations between vision anomalies and sensorimotor processes in children aged 7-16 years.

Clinical & experimental optometry·2026

Same author

Corrigendum to "Navigating image space" [Neuropsychologia, Volume 219 (2025), pages 1-11, 109233].

Neuropsychologia·2025

Same author

Adaptive Responses of Accommodation and Vergence Following Exposure to Augmented Reality in a Head-Mounted Display.

Investigative ophthalmology & visual science·2025

Same author

Navigating image space.

Neuropsychologia·2025

Same author

A scoping review of the ethics frameworks describing issues related to the use of extended reality.

Open research Europe·2025

Same author

Comparing ocular biometry and autorefraction measurements from the Myopia Master with the IOLMaster 700 and the Huvitz HRK-8000A autorefractor.

Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)·2023

Search research articles

Related Experiment Video

Updated: May 23, 2026

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

Published on: April 11, 2025

A demonstration of 'broken' visual space.

Ellen Svarverud¹, Stuart Gilson, Andrew Glennerster

¹Department of Optometry and Visual Science, Buskerud University College, Kongsberg, Norway.

|April 6, 2012

Summary

This summary is machine-generated.

Human perception of 3D space is not a coherent map. Our virtual reality experiment shows visual perception relies on pairwise distance comparisons, not a consistent internal 3D representation.

More Related Videos

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Published on: March 10, 2021

Automated Charting of the Visual Space of Housefly Compound Eyes

Automated Charting of the Visual Space of Housefly Compound Eyes

Published on: March 31, 2022

Related Experiment Videos

Last Updated: May 23, 2026

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

A Gaze-Contingent Display Framework for Perceptual Learning Research with Simulated Central Vision Loss

Published on: April 11, 2025

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Virtual Reality Tools for Assessing Unilateral Spatial Neglect: A Novel Opportunity for Data Collection

Published on: March 10, 2021

Automated Charting of the Visual Space of Housefly Compound Eyes

Automated Charting of the Visual Space of Housefly Compound Eyes

Published on: March 31, 2022

Area of Science:

Visual perception
Cognitive psychology
Virtual reality

Background:

Previous research suggested a distorted mapping between real and perceived spatial environments.
Systematic errors in judging slant, curvature, direction, and separation supported this idea.

Purpose of the Study:

To directly test the notion of a coherent visual space.
To investigate if the visual system constructs a stable internal 3D representation.

Main Methods:

Participants judged relative distances of objects in a virtual environment.
The virtual scene underwent significant expansion between trials without subjective awareness.
Judgments were analyzed for consistency in depth ordering and distance perception.

Main Results:

No consistent depth ordering explained participants' distance judgments.
Performance was dictated by pairwise comparisons of distances, not a global spatial map.
Participants did not perceive significant changes in the virtual scene despite a fourfold expansion.

Conclusions:

The visual system does not build or utilize a coherent internal 3D representation of a scene.
Perception of space is influenced by local, pairwise comparisons rather than a unified spatial model.
This challenges long-held assumptions about the nature of visual spatial mapping.