Improving Understanding of Visual Snow by Quantifying its Appearance and Effect on Vision.

ABSTRACT:

Purpose

Visual snow is the hallmark of the neurological condition visual snow syndrome (VSS) but the characteristics of the visual snow percept remain poorly defined. This study aimed to quantify its appearance, interobserver variability, and effect on measured visual performance and self-reported visual quality.

Methods

Twenty-three participants with VSS estimated their visual snow dot size, separation, luminance, and flicker rate by matching to a simulation. To assess whether visual snow masks vision, we compared pattern discrimination thresholds for textures that were similar in spatial scale to visual snow as well as more coarse than visual snow, in participants with VSS, and with and without external noise simulating visual snow in 23 controls.

Results

Mean and 9

SUBMITTER: Brooks CJ 

PROVIDER: S-EPMC11129720 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature