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.