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Accelerating Research to Cure Visual Snow Syndrome and give patients their lives back

Visual snow syndrome: a comparison between an Italian and British population

1/4/2022

 

M. Viana
, 
F. Puledda, P. J. Goadsby
First published: 01 June 2020
 https://doi.org/10.1111/ene.14369


Abstract

Background and purpose

Visual snow manifests as a pan-field, dynamic visual disturbance described as continuous television static-like tiny flickering dots. Current diagnostic criteria further require at least two additional symptoms for visual snow syndrome (VSS) from: palinopsia (afterimages and trailing); entoptic phenomena (floaters, blue field entoptic phenomenon, photopsia, self-light of the eye); photophobia and nyctalopia. Our objective was to compare the phenotype of VSS in an Italian and British population.

Methods

Patients with VSS were characterized clinically using the current criteria. An online survey was prepared in collaboration with the patient group Eye-on-Vision. Patients were directed to the site if they contacted us by email asking to be involved in research. After data collection, we compared the phenotypic characteristics of a subgroup of British versus Italian patients taking part in the survey. As we expected more responses from the UK, we matched 100 UK patients for gender and age with our Italian cohort.

Results

Patients were enrolled from the UK (n = 100) and Italy (n = 100). The populations had similar demography. After multiple correction testing there were no differences in VSS features between the two groups. The same was true for the prevalence of migraine and previous use of recreational drugs.

Conclusion

This is the first study comparing the phenotype of VSS between two distinct populations. Our findings suggest that the visual snow phenotype, as well as migraine comorbidity, is similar across the two groups.

To read full article please click here or download the PDF below 

euro_j_of_neurology_-_2020_-_viana_-_visual_snow_syndrome__a_comparison_between_an_italian_and_british_population.pdf
File Size: 157 kb
File Type: pdf
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  • Home
  • WHAT IS VISUAL SNOW SYNDROME
    • What is Visual Snow Syndrome >
      • Visual Snow Syndrome Overview
    • Visual Snow Resources
    • Symptoms >
      • Blue Field Entoptic Phenomenon
      • Brain Fog
      • Eye Floaters
      • Glare
      • Nyctalopia
      • Oscillopsia
      • Palinopsia
      • Paresthesia
      • Phosphenes
      • Photophobia
      • Silent Migraine
      • Tinnitus
      • Vertigo
  • HOW TO HELP
    • Donate Once
    • Make a Recurring Donation
    • Corporate Giving & Partners
    • Subscribe
    • Connect with us on Social Media
    • Share your VSS story
    • You Can Fundraise >
      • Volunteer Agreement
    • Events
  • WHAT WE DO
    • About
    • Research & News
    • Research Collaborations
    • Meet our VSS Community
  • Donate