NEURO-OPHTHALMOLOGY AND NEURO-OTOLOGY: Edited by José-Alain Sahel, Michael Strupp and David ZeeVisual snow syndrome: what we know so farPuledda, Francescaa; Schankin, Christophb; Digre, Kathleenc; Goadsby, Peter J.aAuthor Information aHeadache Group, Department of Basic and Clinical Neuroscience, NIHR-Wellcome Trust King's Clinical Research Facility, King's College Hospital, King's College London, London, UK bDepartment of Neurology, Bern University Hospital, University of Bern, Bern, Switzerland cDepartments of Neurology, Ophthalmology, University of Utah, Salt Lake City, Utah, USA Correspondence to Peter J. Goadsby, MD, PhD, Wellcome Foundation Building, King's College Hospital, London SE5 9PJ, UK. Tel: +44 203 299 3106; e-mail: [email protected] Current Opinion in Neurology: February 2018 - Volume 31 - Issue 1 - p 52-58 doi: 10.1097/WCO.0000000000000523 Buy Metrics Abstract Purpose of review We provide an overview of the neurological condition known as visual snow syndrome. Patients affected by this chronic disorder suffer with a pan-field visual disturbance described as tiny flickering dots, which resemble the static noise of an untuned television. Recent findings The term ‘visual snow’ has only appeared in the medical literature very recently. The clinical features of the syndrome have now been reasonably described and the pathophysiology has begun to be explored. This review focuses on what is currently known about visual snow. Summary Recent evidence suggests visual snow is a complex neurological syndrome characterized by debilitating visual symptoms. It is becoming better understood as it is systematically studied. Perhaps the most important unmet need for the condition is a sufficient understanding of it to generate and test hypotheses about treatment. Copyright © 2018 Wolters Kluwer Health, Inc. All rights reserved.