What Is Visual Snow Syndrome? Symptoms, Causes, Diagnosis, Treatment

By Vered Hazanchuk for the American Academy of Ophthalmology Published Feb. 27, 2026

Imagine constantly viewing the world around you as staticky. Having trouble seeing at night or on particularly sunny days. Afterimages trailing after you every time you looked away from an object or a bright light. Until recently, this was exactly how Carmen Stanley, 23, believed everyone experienced the world: flickering and full of tiny dots, like an old television in need of repair.

“I thought it was normal,” Carmen said. “I remember briefly mentioning things being slightly out of focus as a child and being told by my pediatrician that I just needed to get glasses. When I mentioned having an afterimage and patterns being too much to look at, I was told to stop making things up.”

Carmen’s experience is unfortunately not uncommon. Although visual snow syndrome is now a known eye condition among ophthalmologists, it’s a relatively new discovery; diagnosis criteria was only developed within the past 15 years. Patients like Carmen experiencing visual snow syndrome are sometimes misdiagnosed or dismissed due to lack of awareness.

While it may be uncomfortable, people experiencing visual snow syndrome are not in danger or at risk of losing their vision.

“Patients should know that they’re not alone, and the good news is we now have the knowledge needed to diagnose them, which can significantly reduce distress and anxiety related to uncertainty,” said Fannie Nadeau, MD, neuro-ophthalmologist at the University of Sherbrooke.

Is It Normal To Have Static Vision? 

Visual snow syndrome is a rare condition where people experience various visual disturbances, including static or flickering vision, floaters or dots in their vision, and seeing afterimages. While the exact cause is unclear, we know that these symptoms happen when the brain does not process visual information correctly.

Visual snow syndrome is not a dangerous condition, but it does share similar symptoms to some vision-threatening eye conditions, such as retinal detachments. If you experience any symptoms, it is best to see an ophthalmologist for an accurate diagnosis.

How Do You Know If You Have Visual Snow Syndrome? 

“Visual snow syndrome is very rare. However, it is also believed to be underreported because symptoms are similar to other conditions such as visual migraines. Also, many times people live with this condition their entire lives unaware that anything is out of the ordinary,” said Dr. Nadeau.

A neuro-ophthalmologist is a medical doctor specialized in how the eye and brain interact, and can help confirm a diagnosis. Depending on the individual patient’s specific symptoms, they may also be referred to other physicians for treatment.

Symptoms of visual snow syndrome

Since symptoms of visual snow syndrome are similar to many other eye conditions and potentially blinding diseases, it is best to discuss any symptoms with a medical doctor. Common symptoms can include:

• Numerous tiny flickering spots or dots in vision
• Afterimages
• Sensitivity to light
• Impaired night vision
• Flashing lights, floaters, or kaleidoscope-like colors in vision

Diagnosing visual snow syndrome

There is no specific medical test used to diagnose visual snow syndrome, although a physician may run tests to eliminate other diseases with similar symptoms. A discussion with an ophthalmologist about symptoms and overall health is currently the best way to diagnose visual snow syndrome.

In Carmen’s case, she began noticing new floaters and did exactly what most people do: she Googled it. She read about various potential causes, including visual snow syndrome, and decided to schedule an eye exam. 

Visual snow syndrome stood out to Carmen because she had never heard of it, yet it sounded similar to her experience. Still, she said, “I expected to be proved wrong. Instead, I was given a clean bill of health and confirmed that I did have visual snow syndrome. The amount of relief I had after being told that it wasn’t in my head and that it was an actual thing was grounding. I no longer have to constantly worry about finding what is wrong with me, I’m able to narrow the focus and figure out how to live with it.”

Visual snow syndrome and migraines

Carmen lives with several other chronic health issues, including migraines, insomnia, and motion sickness.

Dr. Nadeau says this is not uncommon. Migraines in particular are often associated with visual snow syndrome. However, there isn’t any data to suggest causation.

“They are separate conditions,” said Dr. Nadeau. “However, from my experience, cases tend to be a mixed bag. If a patient experiences both visual snow syndrome and migraines, treating the migraines typically results in the visual snow syndrome getting better, too.”

Treating visual snow syndrome

“It is important to remember that this is a benign condition. That being said, we understand that these can be very distressing symptoms, especially if people notice vision worsens or begin experiencing visual snow syndrome later in life,” said Dr. Nadeau.

There is no known cure for visual snow syndrome. Instead, management focuses on addressing associated conditions such as anxiety and migraines. Some patients benefit from chromatic filters (FL-41 tint lenses) to reduce photophobia. No medication is FDA-approved specifically for visual snow syndrome.