Related Experiment Video
Updated: Jun 20, 2026
07:24
Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
Published on: August 22, 2025
Ocular fixation, vestibular dysfunction, and visual motion hypersensitivity
Patricia A Winkler1, Kenneth J Ciuffreda
1Regis University, Denver, Colorado, USA. pwinkler@regis.edu
Optometry (St. Louis, Mo.)
|September 1, 2009
Summary
Individuals with visual motion hypersensitivity (VMH) struggle to maintain stable gaze and exhibit more eye movements, leading to dizziness. This suggests VMH may be a maladaptation in visual-vestibular processing.
Area of Science:
- Neuroscience
- Ophthalmology
- Vestibular System Research
Background:
- Visual motion hypersensitivity (VMH) causes dizziness and imbalance with visual environment movement.
- Vestibular dysfunction can be associated with VMH.
Purpose of the Study:
- Investigate ocular fixational stability during visual background movement in individuals with VMH.
- Examine binocular vision functions as potential contributors to VMH symptoms.
Main Methods:
- Tested 24 individuals with VMH, 20 with vestibular disorders (no VMH), and 20 healthy controls.
- Recorded horizontal eye fixation and blinks using electro-oculography.
- Assessed binocular vision functions and dizziness levels using the Dizziness Handicap Inventory.
Main Results:
- VMH group showed significantly more refixational eye movements and higher dizziness scores.
- Abnormalities in binocular function were observed in VMH and vestibular dysfunction groups compared to controls.
- Individuals with VMH failed to maintain stable gaze and inhibit eye movements during visual motion.
Conclusions:
- VMH is characterized by impaired ocular fixation stability and increased dizziness.
- Binocular vision deficits are present in VMH and vestibular dysfunction.
- VMH may represent a maladaptive response, possibly linked to fluctuating vestibular function.
Related Concept Videos
01:15Equilibrium and Balance
The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
01:29The Vestibular System
The vestibular system is a set of inner ear structures that provide a sense of balance and spatial orientation. This system is comprised of structures within the labyrinth of the inner ear, including the cochlea and two otolith organs—the utricle and saccule. The labyrinth also contains three semicircular canals—superior, posterior, and horizontal—that are oriented on different planes.
01:22Photoreceptors and Visual Pathways
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, whereas...
01:17Accessory Structures of the Eye
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
01:25Glaucoma: Overview
Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...