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Visual snow syndrome: is it normal or a disorder – and what to do with patients?

Recently in the journal, epidemiological data are presented on visual snow syndrome (VSS) using a crowdsourcing online platform [1]. The authors applied criteria for VSS to a sample of people matched for age, sex, and ethnicity to United Kingdom census data. Further, they assessed frequent headache lasting longer than 4 hours, which was interpreted as migraine, and neurological symptoms during headache, interpreted as aura.