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Related Concept Videos

Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Visual System01:26

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...
Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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Anatomy of the Eyeball01:20

Anatomy of the Eyeball

The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
Parallel Processing01:20

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

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Related Experiment Video

Updated: May 25, 2026

VisualEyes: A Modular Software System for Oculomotor Experimentation
10:41

VisualEyes: A Modular Software System for Oculomotor Experimentation

Published on: March 25, 2011

Voluntary attention modulates processing of eye-specific visual information.

Peng Zhang1, Yi Jiang, Sheng He

  • 1University of Minnesota, Minneapolis, MN, USA.

Psychological Science
|February 4, 2012
PubMed
Summary
This summary is machine-generated.

Voluntary attention can be eye-specific, influencing visual processing in one eye even without awareness of the cue's origin. This eye-specific attention impacts visual competition and is load-dependent.

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Last Updated: May 25, 2026

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception

Background:

  • Visual attention selects critical information for processing.
  • Early visual processing separates information from each eye before integration.
  • Normally, individuals lack awareness of the eye-origin of visual input.

Purpose of the Study:

  • To investigate if voluntary attention can be eye-specific.
  • To determine if attention modulates visual processing within a single monocular channel.
  • To explore the characteristics of eye-specific attentional effects.

Main Methods:

  • Utilized a modified binocular rivalry paradigm.
  • Employed monocular cues to direct attention without revealing eye of origin.
  • Assessed attentional effects on stimulus competition and consciousness suppression.

Main Results:

  • Attending to a monocular cue enhanced stimulus competition in the cued eye, even when suppressed from awareness.
  • Eye-specific attentional effects were independent of low-level cue properties (size, contrast).
  • The observed effects were sensitive to attentional load.

Conclusions:

  • Top-down attention can modulate visual processing at the eye-specific stage.
  • Attention can operate in an eye-specific manner, influencing early visual processing.
  • Demonstrated a novel mechanism for attentional control in visual perception.