Patients with so-called ‘visual snow’ describe a persistent disturbance in the entire visual field resembling the ‘static’ or ‘snow’ of a badly-tuned analogue television. The symptoms are continuous and can persist over years. Although many primary care providers, ophthalmologists, neuro-ophthalmologists and neurologists have seen patients with such complaints, the problem remains undefined.

Source : Brain, Volume 137, Issue 5, May 2014, Pages 1419–1428

The cause of visual snow is unknown. It's often, but not always, associated with Migraineplugin-autotooltip__plain plugin-autotooltip_bigMigraine

"Chronic migraine has a great detrimental influence on a patient’s life, with a severe impact on socioeconomic functioning and quality of life. Chronic migraine affects 1–2% of the general population, and about 8% of patients with migraine; it usually develop…, and with a variety of other visual disturbances - and also with the hearing disorder Tinnitusplugin-autotooltip__plain plugin-autotooltip_bigTinnitus

"Tinnitus is the perception of noises in the head and/or ear which have no external source. It derives from the Latin word for ringing and those living with the condition may have to endure a ringing, buzzing, hissing, whistling or other noise. The sensation ….

Current research suggests that the syndrome is not an eye problem as such, but appears to be a malfunction in the brain's visual system, specifically in the right lingual gyrus and the left cerebellar anterior lobe.

There are currently no successful treatments.

Further info : VisualSnowSyndrome.com

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