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Related Experiment Video

Updated: Jan 15, 2026

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

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

Visual Snow Is Susceptible to the Motion Aftereffect.

Samantha A Montoya¹, Anna J Hillstrom², Karly D Allison²

¹University of Minnesota Twin Cities, Neuroscience Minneapolis, Minnesota, United States.

Investigative Ophthalmology & Visual Science

|October 14, 2025

Summary

This summary is machine-generated.

Visual snow, a condition of flickering specks, is affected by motion aftereffects, suggesting it originates in early visual pathways. This finding may lead to new treatments for visual snow syndrome.

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Last Updated: Jan 15, 2026

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

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Published on: August 22, 2025

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Published on: April 14, 2014

Area of Science:

Neuroscience
Visual Perception
Ophthalmology

Background:

Visual snow syndrome (VSS) is characterized by persistent visual static.
The underlying neural mechanisms of VSS remain largely unknown.
Current treatments for VSS are limited.

Purpose of the Study:

To investigate if spontaneous neural activity causing visual snow reaches motion-selective areas.
To test the hypothesis that visual snow originates early in the visual pathway.
To utilize the motion aftereffect (MAE) to probe VSS neural mechanisms.

Main Methods:

Eleven participants with VSS and 12 controls adapted to moving gratings.
Participants reported the perceived motion of their visual snow after adaptation.
The duration of adapting stimuli was varied to assess MAE strength.

Main Results:

Most VSS participants (10/11) perceived their visual snow moving in the opposite direction of adapting stimuli.
The duration of the motion aftereffect showed a linear relationship with adapter duration on a log-log axis.
Participants with VSS exhibited a typical MAE to external visual stimuli in control conditions.

Conclusions:

Visual snow is influenced by the motion aftereffect, indicating it involves motion-selective neurons, potentially including area V5/MT.
The findings suggest that neural activity generating visual snow propagates through the visual system.
Identifying the neural origins of visual snow could pave the way for targeted therapeutic interventions.