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Related Concept Videos

Vision01:24

Vision

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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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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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Depth Perception and Spatial Vision01:15

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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

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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.
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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Related Experiment Video

Updated: Feb 22, 2026

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
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Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

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I Spy With My Dominant Eye.

Damian Manzone, Tristan Loria, Luc Tremblay1

  • 1a Faculty of Kinesiology and Physical Education , University of Toronto , Ontario , Canada.

Journal of Motor Behavior
|September 27, 2017
PubMed
Summary

Visual input from the dominant eye significantly influences hand movement control. This research shows dominant eye vision is crucial for precise, accurate, and adaptable upper-limb movements.

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Biomechanics

Background:

  • Understanding how the brain integrates visual information is key to motor control.
  • The distinct roles of dominant and nondominant eyes in visuomotor tasks remain incompletely understood.

Purpose of the Study:

  • To investigate the differential contribution of dominant and nondominant eye visual input to online control of dominant hand movements.
  • To determine how eye dominance affects visuomotor adaptation to target perturbations.

Main Methods:

  • Participants performed pointing movements under monocular (dominant/nondominant eye) and binocular viewing conditions.
  • Experiments included reaching to stationary targets and targets that imperceptibly shifted mid-movement.
  • Movement kinematics like endpoint precision, accuracy, and trajectory adjustments were analyzed.
Keywords:
manual aimingmotor controlonline control processesvisuomotor processing

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Related Experiment Videos

Last Updated: Feb 22, 2026

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Main Results:

  • Dominant eye viewing yielded superior endpoint precision and accuracy compared to nondominant eye viewing.
  • Online trajectory corrections following target jumps were significantly more effective with dominant eye visual input.
  • Nondominant eye viewing showed limited capacity for online movement adaptation.

Conclusions:

  • Visual information from the dominant eye plays a critical role in the online visuomotor control of dominant hand movements.
  • The dominant eye's input is essential for adapting ongoing movements to visual perturbations.
  • These findings highlight the asymmetric contribution of visual pathways in sensorimotor integration.