Visual snow syndrome (VSS) is a debilitating disorder characterized by continuous visual snow (VS), ie, tiny flickering dots in the entire visual field resembling the view of a badly tuned analog television (Figure ), plus additional visual symptoms, such as photophobia and palinopsia. There is a high comorbidity with migraine and migraine aura. 1 To our knowledge, this is the first report of patients with an episodic form of VS (eVS), strictly co-occurring with migraine attacks.Methods | Between January 2016 and December 2017, we saw 3 patients with eVS and 1934 patients with migraine at our tertiary outpatient headache center. Diagnoses were made according to the International Headache Society International Classification of Headache Disorders-3 2 and our previous work, 1 except for the requirement of permanence for VS. The case series was approved by the Cantonal Ethics Committee Bern (Req-2017-00698) with waiver of written informed consent based on general consent given by all patients.

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