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A syndrome of continuous, enveloping positive visual phenomena, visual snow (VS), afflicts patients who have perennially sought care from ophthalmologists and neurologists without broad recognition of their having a distinct clinical syndrome. Early characterizations of VS predominated in cohorts enriched with high rates of migraine, particularly with visual aura, leading to innumerable treatment trials of migraine preventive therapies for VS that have largely been ineffective.1
Footnotes
Disclosure: M.S. Robbins serves on the board of directors for the American Headache Society, the editorial board for Headache, and is a section editor for Current Pain and Headache Reports. He has received book royalties from Wiley. Go to Neurology.org/N for full disclosures.
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