Visual snow syndrome(VSS)is a visual-disturbance disease characterized by continuous flickering tiny dots in the entire visual field,sometimes with visual symptoms like photophobia or nyctalopia and non-visual symptoms such as anxiety and depression.VSS can remain stable or worsen,causing distress to patients'visual experience and mental state.The pathological mechanism of VSS is still unclear and a hy-pothesis indicates a relationship between VSS and increased cortical excitability of the visual cortex.Some case reports suggest anti-seizure medications,colored filters and TMS may help eliminate symptoms,but futh-er studies are required to verify these treatments.This review will systematically introduce what we know about VSS so far.
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