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Related Concept Videos

Vision01:24

Vision

59.2K
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.
59.2K
Visual System01:26

Visual System

1.6K
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...
1.6K
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

8.5K
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,...
8.5K
Visual Agnosia01:12

Visual Agnosia

819
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...
819
Color Vision01:24

Color Vision

1.3K
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
1.3K
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

1.7K
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.
1.7K

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Receptive fields from single-neuron recording and MRI reveal similar information coding for binocular depth.

Proceedings of the National Academy of Sciences of the United States of America·2025
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Correlated and Anticorrelated Binocular Disparity Modulate GABA+ and Glutamate/Glutamine Concentrations in the Human Visual Cortex.

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Characterizing Human Disparity Tuning Properties Using Population Receptive Field Mapping.

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MRI Stereoscope: A Miniature Stereoscope for Human Neuroimaging.

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Related Experiment Video

Updated: Jan 1, 2026

Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing
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Author Spotlight: Assessment of Visual Acuity in Central Vision Loss Through Motion-Based Peripheral Vision Testing

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Recognition for Vision.

Andrew J Parker1

  • 1Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3PT, UK.

Vision (Basel, Switzerland)
|December 22, 2019
PubMed
Summary

Milestones like a child's first word or first steps are significant developmental events. Understanding these early childhood milestones aids in tracking healthy cognitive and motor development.

Area of Science:

  • Pediatrics
  • Developmental Psychology
  • Neuroscience

Background:

  • Early childhood development is characterized by significant milestones, including first words and first steps.
  • These events are crucial indicators of cognitive and motor skill progression.

Discussion:

  • The emergence of first words and walking reflects complex neural pathway development.
  • Parental interaction and environmental factors significantly influence the timing of these milestones.

Key Insights:

  • Tracking first words and steps provides valuable data for developmental assessments.
  • Deviations from typical developmental timelines may warrant further investigation.

Outlook:

  • Further research can explore the long-term impacts of early developmental trajectories.

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Related Experiment Videos

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  • Utilizing advanced neuroimaging and behavioral analysis can offer deeper insights into early childhood development.