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Start free with EleplanVisual snow syndrome
ORPHA:420556Disease
What it is
Visual snow syndrome is a rare neurologic disease characterized by persistent continuous bilateral visual experience of flickering snow-like dots throughout the visual field in association with other visual (including palinopsia, enhanced entopic phenomena, nyctalopia, photophobia and photopsia) and non-visual (migraine with or without aura, tinnitus and occasionally tremor) symptoms.
Key facts
- Inheritance
- Not applicable
- Classified as
- Disease
Signs and symptoms
Common30–79%
19- Anxiety
- Bipolar affective disorder
- Depersonalization
- Depression
- Derealization
- Diminished ability to concentrate
- Entoptic phenomenonDiagnostic criterion
- Fatigue
- Irritability
- Migraine
- Neck pain
- NyctalopiaDiagnostic criterion
- Paresthesia
- PhotophobiaDiagnostic criterion
- PhotopsiaDiagnostic criterion
- Sleep abnormality
- Tinnitus
- Tremor
- Vertigo
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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