Visual snow: Not so benign

White, 2018, Visual snow: visual misperception, J Neuroophthalmol, 38, 514, 10.1097/WNO.0000000000000702 Puledda, 2018, Visual snow syndrome: what we know so far, Curr Opin Neurol., 31, 52, 10.1097/WCO.0000000000000523 Schankin, 2014, ‘Visual snow’ – a disorder distinct from persistent migraine aura, Brain., 137, 1419, 10.1093/brain/awu050 Goadsby PJ, White OB, Pelak VS, Khan Y. Visual snow diagnostic criteria, https://www.visualsnowinitiative.org/diagnostic-criteria/; 2018 [accessed 2 December 2018]. McKendrick, 2017, Behavioral measures of cortical hyperexcitability assessed in people who experience visual snow, Neurology, 88, 1243, 10.1212/WNL.0000000000003784 Baiardi, 2016, Revisiting the Heidenhain variant of Creutzfeldt-Jakob disease: evidence for prion type variability influencing clinical course and laboratory findings, J Alzheimers Dis, 50, 465, 10.3233/JAD-150668