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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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Color Vision01:24

Color Vision

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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.
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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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Self-Evaluation: Self-Enhancement and Self-Verification03:00

Self-Evaluation: Self-Enhancement and Self-Verification

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Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
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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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Nursing Evaluation01:15

Nursing Evaluation

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The evaluation stage signals the end of the nursing process. The nurse gathers evaluative data to assess whether or not the patient has attained the expected results. Whereas the nurse collects data in the nursing assessment to identify the patient's health concerns, the evaluation stage data determines if the indicated health issues are resolved. Evaluative data collection includes two sections: the data acquired to evaluate patient outcomes and the time criteria for data collection.
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Related Experiment Video

Updated: Jan 22, 2026

Using Looming Visual Stimuli to Evaluate Mouse Vision
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Using Looming Visual Stimuli to Evaluate Mouse Vision

Published on: June 13, 2019

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Using Looming Visual Stimuli to Evaluate Mouse Vision.

Christina C Koehler1, Leo M Hall1, Chase B Hellmer1

  • 1Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University School of Medicine.

Journal of Visualized Experiments : Jove
|July 2, 2019
PubMed
Summary
This summary is machine-generated.

A looming stimulation experiment offers a reliable method for mouse vision testing. This simple approach accurately assesses visual processing by observing behavioral responses to simulated threats.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Animal Behavior

Background:

  • The central nervous system's visual system processes complex visual information from the retina to the visual cortex.
  • Understanding visual processing mechanisms is crucial for studying visual diseases and developing artificial visual systems.
  • Behavioral vision testing is essential for validating cellular and molecular studies of the visual system.

Purpose of the Study:

  • To establish a reliable and simple behavioral test for assessing mouse vision.
  • To validate the effectiveness of the looming stimulation experiment as a mouse vision test.

Main Methods:

  • Mice were placed in an enclosure with a shelter and exposed to a computer-generated looming stimulus projected from a ceiling-mounted monitor.
  • Mouse behavior (freezing or fleeing) was recorded using a CCD camera and analyzed with motion tracking software.
  • Behavioral changes and movement velocity were compared before and after stimulus presentation, and in blind mice.

Main Results:

  • The looming stimulation significantly altered mouse movement velocity, indicating a behavioral response to the visual threat.
  • Blind mice showed no discernible reaction to the looming stimuli.
  • The experiment demonstrated a clear correlation between visual stimuli and behavioral responses in sighted mice.

Conclusions:

  • The looming stimulation experiment is a reliable and straightforward method for assessing functional vision in mice.
  • This behavioral test can effectively validate findings from other visual system research and contribute to understanding visual deficits.