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Related Concept Videos

Coriolis Force01:23

Coriolis Force

An accelerating particle experiences a force equal to the mass multiplied by the acceleration in an inertial frame of reference. Consider a particle in a non-inertial frame of reference, such as a sliding ball on a rotating table. The acceleration of the ball in this rotating reference frame is different than in the intertial frame, which modifies its equation of motion. The fictitious forces acting additionally on a rotating frame of reference alter Newton's Second Law expression. Centripetal...
Perceptual Constancy01:12

Perceptual Constancy

Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Visual Agnosia01:12

Visual Agnosia

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 end"...
Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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.
Curvilinear Motion: Polar Coordinates01:27

Curvilinear Motion: Polar Coordinates

In polar coordinates, the motion of a particle follows a curvilinear path. The radial coordinate symbolized as 'r,' extends outward from a fixed origin to the particle, while the angular coordinate, 'θ,' measured in radians, represents the counterclockwise angle between a fixed reference line and the radial line connecting the origin to the particle.
The particle's location is described using a unit vector along the radial direction. Deriving the particle's position with respect to time...
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.

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Related Experiment Video

Updated: Jun 23, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior
09:49

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Published on: April 16, 2014

Changes in visual function during the Coriolis illusion.

Chi-Ting Horng1, Chung-Cheng Liu, Daih-Iluang Kuo

  • 1Department of Ophthalmology, Kaohsiung Armed Force General Hospital, Kaohsiung, Taiwan.

Aviation, Space, and Environmental Medicine
|April 22, 2009
PubMed
Summary

The Coriolis illusion, a cause of pilot disorientation, reduced stereopsis (depth perception) in 77.8% of subjects. Visual acuity remained largely unaffected, but nystagmus and elevated EOG/EEG activity were observed.

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Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
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Area of Science:

  • Aerospace Medicine
  • Human Factors Engineering
  • Neuroscience

Background:

  • The Coriolis illusion can induce spatial disorientation, posing risks for aviation safety.
  • Its impact on visual functions like visual acuity and stereopsis remains largely uninvestigated.

Purpose of the Study:

  • To investigate the effects of Coriolis stimulation on visual acuity and stereopsis in human subjects.
  • To assess associated physiological responses including eye movements, electrooculography (EOG), and electroencephalography (EEG).

Main Methods:

  • 18 healthy subjects underwent Coriolis stimulation using a spatial disorientation simulator.
  • Visual acuity was assessed using the Rosenbaum Vision Card, and stereopsis with the Titmus stereo test.
  • Eyeball movements, EOG, and EEG were recorded throughout the experiment.

Main Results:

  • While 50% maintained 20/20 visual acuity, the other 50% experienced a two-line drop.
  • Stereopsis decreased significantly in 77.8% of subjects, falling to 800 arc-seconds or less.
  • Observed rhythmic nystagmus, elevated EOG amplitudes, and increased EEG frequency during stimulation.

Conclusions:

  • Coriolis stimulation impairs stereopsis but generally maintains visual acuity.
  • Physiological changes indicate heightened neural and ocular activity during the illusion.
  • Further research is recommended to fully understand these visual and physiological effects.