When you look at clouds, tree bark, or the front of a car, do you sometimes see a face staring back at you? That’s called “face pareidolia.” It is a normal illusion where our brains spot faces in patterns that aren’t actually faces.
New research by the University of Queensland, published in Perception, suggests that people with Visual Snow Syndrome experience this phenomenon more strongly and more often. This finding offers a unique window into how an overactive brain may amplify illusory patterns in the world. It also shows that perception is not a perfect mirror of reality.
Methods
To test whether this hyperactive visual system changes how people interpret ambiguous visual input, the research team invited more than 250 volunteers to complete an online experiment.
Participants first filled out a short questionnaire to see if they had Visual Snow Syndrome symptoms. In total, 132 people met the criteria for the condition, with 104 serving as an age-matched control group. Researchers also tracked whether participants had migraines, allowing for comparisons between four subgroups.
Participants were then shown 320 images of everyday objects, from tree trunks to cups of coffee, and asked to rate, on a scale from 0 to 100, how easily they could see a face in each image.
Results
People with Visual Snow Syndrome consistently gave higher “face scores” for every image than those without the condition. This suggests they were more likely to see faces in random textures and objects. Those with both visual snow and migraines scored the highest.
The pattern was remarkably consistent. In general, the groups agreed on which images looked most like faces, but the visual snow group reported seeing illusory faces more vividly. In other words, the same objects triggered a stronger illusion.
These results align with earlier theories that the visual snow brain is hyper-responsive. Normally, our visual system generates quick, low-level “guesses” about what we’re seeing, followed by slower checks to confirm those guesses. When that feedback loop is disrupted by excessive neural activity, an early “false alarm,” such as mistaking an object for a face, may be amplified rather than corrected.
Why Migraine Makes it Stronger
Migraine and visual snow are frequently linked, and both involve abnormally high levels of cortical activity. During a migraine, visual neurons can become hypersensitive to flicker, light, and contrast.
The data suggest that when migraine and visual snow occur together, the brain’s sensitivity to illusory faces increases further. This may reflect a shared neural pathway underlying both conditions.
Future research could use this relationship to develop new diagnostic tools. Face pareidolia tests are quick, accessible, and could be adapted for children or nonverbal patients who cannot easily describe what they see.
A New Way to Understand Perception
Face pareidolia is not a disorder. It is a side effect of a perceptual system that prioritizes social information. Evolution has biased our visual system to spot faces first and ask questions later.
For people with visual snow, the system may be set too high. Their brains may “connect the dots” in visual noise, translating ambiguous input into meaningful patterns. This finding supports the idea that visual snow is not a vision problem but a disturbance in how the brain interprets visual input.
Visual Snow Syndrome is often dismissed or misdiagnosed, leaving patients frustrated. Linking the condition to a measurable illusion, such as face pareidolia, gives clinicians a tangible sign of the altered brain activity behind the symptoms.
It also humanizes the experience. People with visual snow are not imagining their perceptions—their brains are genuinely processing the world differently.
Beyond diagnosis, this research contributes to a bigger question in neuroscience: how does the brain strike a balance between sensitivity and accuracy? Too little activity, and we miss the signal. Too much, and we start to see faces in the snow.
Read More in the Original Study
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This Rare Syndrome Induces People to See Faces That Don’t Exist
When the brain sees faces everywhere: How visual snow syndrome amplifies pareidolia