Another hypothesis proposes that visual snow syndrome could be a type of thalamocortical dysrhythmia and may involve the thalamic reticular nucleus (TRN). The underlying mechanism is believed to involve excessive excitability of neurons in the right lingual gyrus and left anterior lobe of cerebellum. Migraine and tinnitus are common comorbidities and are both associated with a more severe presentation of the syndrome. The condition is typically always present and has no known cure. Visual snow, also known as visual static, is an uncommon neurological condition in which the affected individuals see white, black, transparent, or coloured dots across the whole visual fields. Migraine aura, Persistent aura without infarction, Hallucinogen persisting perception disorder Īnticonvulsants (limited evidence and success) Migraine sufferer, psychoactive substance use Unknown, hyperexcitability of neurons and processing problems in the visual cortex Visual Snow can appear at any time, but it commonly appears at birth, late teenage years, and early adulthood. Poor quality of vision, Photophobia, Heliophobia, Depersonalization and Derealization Static and auras in vision, Palinopsia, Blue field entoptic phenomenon, Nyctalopia, Tinnitus Persistent positive visual phenomenon, visual static, aeropsiaĪnimated example of visual snow-like noise
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