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Related Concept Videos

Vision01:24

Vision

59.0K
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.
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Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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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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Visual System01:26

Visual System

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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...
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Anatomy of the Eyeball01:20

Anatomy of the Eyeball

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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...
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Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
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Related Experiment Video

Updated: Dec 14, 2025

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
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Two Is Greater Than One: Binocular Visual Experience Drives Cortical Orientation Map Alignment.

Rolf Skyberg1, Seiji Tanabe2, Jianhua Cang3

  • 1Department of Biology, University of Virginia, Charlottesville, VA 22904, USA.

Neuron
|July 24, 2020
PubMed
Summary

Newly born brains have three visual maps that merge into one unified map with visual experience. This study reveals how binocular vision shapes the brain's orientation maps.

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Area of Science:

  • Neuroscience
  • Visual Cortex Development
  • Sensory Integration

Background:

  • The mature visual cortex exhibits binocularly matched orientation maps, crucial for depth perception.
  • The developmental processes leading to this mature state are not fully understood.

Purpose of the Study:

  • To investigate the state of orientation maps at the onset of vision.
  • To determine the role of binocular visual experience in organizing these maps.

Main Methods:

  • Utilized in vivo imaging techniques to visualize neural activity.
  • Recorded orientation maps in the visual cortex of developing animals.

Main Results:

  • Identified three distinct orientation maps present at the earliest stages of visual system development.
  • Demonstrated that binocular visual experience is essential for aligning these separate maps.
  • Showed the emergence of a single, unified orientation map following visual input.

Conclusions:

  • Binocular visual experience actively shapes and refines orientation maps in the early visual cortex.
  • The brain initially establishes multiple representations that are subsequently integrated through sensory input.