Visual snow is a neurological disorder characterized by a continuous visual disturbance that occupies the entire visual field and is described as tiny flickering dots that resemble the noise of a detuned analogue television.
The disturbances are seen whether the person's eyes are open or closed and stay constant over time.
In severe cases visual snow can cause impaired vision and even legal blindness.
Researchers think the syndrome may be caused by an abnormality in part of the brain.In the past, people with this syndrome were often misdiagnosed with migraines or other disorders.
Visual snow, or visual static, is an uncommon neurological condition that affects around 2% of the population.
Visual snow can be made worse by environmental factors. The most common environmental factors were dim or low-light conditions, harsh artificial light, bright sunlight, and darkness.
Visual snow is a form of visual hallucination that is characterized by the perception of small, bilateral, simultaneous, diffuse, mobile, asynchronous dots usually throughout the entire visual field.
It frequently occurs in patients with concussion/mild traumatic brain injury and other brain-related abnormalities.
Pixelated vision or visual snow has also been associated with schizophrenia.
Initial functional brain imaging research suggests visual snow is a brain disorder. There is no established treatment for visual snow.
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