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Visual Snow PDF Print E-mail

Visual snow (VS) is the persisting visual symptom of seeing snow or television-like static across their visual field. The snow and static tends to be worse in the dark, but can be seen in all lighting conditions.

VS should not be confused with normal entoptic phenomena or vitreous floaters. While these two conditions also cause you to see spots and floating objects, this is not the same as VS.

There is no known cause for visual snow. Through documented case studies illegal and legal drug usage can sometimes lead to VS, but little is known on the specific causes. A few connections between HPPD, auto-immune disease, and lyme disease have been found. However, far more cases of visual snow have no connection at all to another condition.

Visual SnowAlthough the vision is affected, very few people have had irregular eye test results. Most come back within normal range, leading doctors to believe that patients may be making their symptoms up. CT scans and MRIs also tend to come back normal, again stumping doctors. It is more likely to be an undetectable chemical imbalance in the brain.

The term visual snow is rather limiting for the condition as there are numerous symptoms that patients experience above and beyond visual snow. Many people also see after images, vitreous floaters, entopic phenomenon, glare, halos, starbursts, trails, palinopsia, double vision, odd colors and shapes. Many sufferers also have non-visual symptoms such as fatigue, tinnitus or depersonalization and derealisation.

There currently is no established treatment for visual snow. Many patients have tried migraine medication with little to no success. Other have tried herbs, cleansing, acupuncture, and chiropractors, again with little to no success.

It is important for you to realize that this is a 24/7 condition for these sufferers. The symptoms do not ever go away. Even with their eyes closed they see the static, afterimages and other disturbing visual images. With the help of a handful of caring doctors, the Eye on Vision Foundation strives to raise funds for research into finding a treatment.

Dr. Goadsby and Dr. Schankin are 100% committed to this research. They believe they found the area of the brain where VS is coming from. Hopefully this will lead to a treatment plan. Latest research paper




Use our hashtag to create awareness for our cause #visualsnow


If you have visual snow syndrome, please send the information below to 


Please provide the following information within your email:



Date of Birth (Day/Month/Year)

Telephone number

1) Please make a brief statement that you are willing to be contacted for research. This is a European data protection issue. 

"Yes, please keep my contact details and you may contact me for research purposes."

2) Brief description of all symptoms you relate to visual snow syndrome. 

3) Date or age when your symptoms started.

4) Visual snow: what type (chose one):

-          black and white (i.e. only black dots on white background, white dots on black background)

-          clear (i.e. color of the background)

-          flashing (i.e. always white, brighter than background)

-          colored

-          all of these

5) Other symptoms (please only answer yes or no)

-          After images

-          Trailing of images in the vision

-          Blue field entoptic phenomenon (i.e. white squiggly lines moving pulsating on the blue sky)

-          Floaters in vision

-          Colored clouds or waves with eyes closed

-          Flashes of light

-          Impaired night vision

-          Sensitive to  light

-          Tinnitus

6) Have you ever been diagnosed with migraine or have you had a headache of moderate or severe intensity in the past? ( Please answer yes or no)

    7) Have you ever taken any illicit drugs in the past?

    Here is the email once more for you:  


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