Visual snow: A thalamocortical dysrhythmia of the visual pathway?

Jenny L. Lauschke, Gordon T. Plant, Clare L. Fraser*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)


In this paper we review the visual snow (VS) characteristics of a case cohort of 32 patients. History of symptoms and associated co-morbidities, ophthalmic examination, previous investigations and the results of intuitive colourimetry were collected and reviewed. VS symptoms follow a stereotypical description and are strongly associated with palinopsia, migraine and tinnitus, but also tremor. The condition is a chronic one and often results in misdiagnosis with psychiatric disorders or malingering. Colour filters, particularly in the yellow-blue colour spectrum, subjectively reduced symptoms of VS. There is neurobiological evidence for the syndrome of VS that links it with other disorders of visual and sensory processing such as migraine and tinnitus. Colour filters in the blue-yellow spectrum may alter the koniocellular pathway processing, which has a regulatory effect on background electroencephalographic rhythms, and may add weight to the hypothesis that VS is a thalamocortical dysrhythmia of the visual pathway.

Original languageEnglish
Pages (from-to)123-127
Number of pages5
JournalJournal of Clinical Neuroscience
Publication statusPublished - 1 Jun 2016
Externally publishedYes


  • Colour filter
  • Migraine
  • Palinopsia
  • Positive persistent visual disturbance
  • Thalamocortical dysrhythmia
  • Visual snow


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