Diagnostic Criteria

> Diagnostic Criteria
Visual Snow Syndrome

Diagnostic Criteria

Please refer your physician to our website if they have limited knowledge about Visual Snow Syndrome (VSS), as this helps to spread awareness and education within the medical community.

If you suspect you may have VSS, please show this Diagnostic Criteria to your physician.

Oaxaca de Juárez, Oaxaca, Mexico
Visual Snow Syndrome

Signs and Symptoms

For a full list of symptoms and images depicting each symptom, please see the information and visual aids below.

*excessive floaters in both eyes, excessive blue field entoptic phenomenon (uncountable little grey/white/black dots or rings shooting over the visual field of both eyes when looking at homogeneous bright surfaces such as the blue sky), self-lighting of the eye (colored waves or clouds perceived when closing the eyes in the dark), and spontaneous photopsia (bright flashes of light)

What is It Like Having VSS?

Visual Symptoms

Visual Snow


Excessive Floaters


Enhanced entoptic phenomena



Migraine Aura


What is It Like Having VSS?

Non-Visual Symptoms



Anxiety and/or Depression

Frequent Migraines, Brain fog, and Confusion

Dizziness and Nausea



VSI News

Articles about VSS Symptoms


Authors and Summary

Peter Goadsby, MD PhD
Professor of Neurology, King’s College London

Owen White, MD PhD FRACP
Professor of Neurosciences, Monash University, Australia

Victoria Susan Pelak, MD
Professor of Neurology and Ophthalmology, University of Colorado, Denver

Yasser Khan, MD FRCSC
Oculoplastic, Orbital, and Ophthalmic Surgery

The Visual Snow Initiative website is for informational purposes only. The contents do not constitute medical advice; the content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website. This website does not recommend or endorse any specific tests, physicians, products, procedures, opinions, or other information that may be mentioned on the Site. Reliance on any information provided by this website is solely at your own risk.

Visual Symptoms

Non-Visual Symptoms

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