ABSTRACT
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 hypothesis 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 futher studies are required to verify these treatments. This review will systematically introduce what we know about VSS so far.
ABSTRACT
@#A systematic review of visual snow syndrome(VSS)was introduced in this article. Scientists don't know what caused visual snow syndrome for sure, but studies have shown that patients with VSS experience continuous television-static-like tiny flickering dots in the entire visual field and additional visual symptoms such as palinopsia, entoptic phenomena or photophobia or nyctalopia. Literature in recent years on the clinical and pathophysiological researches of VSS was reported, and in the latest literature, the VSS was more inclined to be seen as a visual processing disorder. It should be distinguished from the migraine and other diseases. In terms of treatment, current studies focused on experimental studies. Some case reports showed that anti-Seizure medications, antidepressants, or acetazolamide and colored filter-sheet may be effective in eliminating symptoms.