Modern Decor May Be Straining People’s Brains

A bright, colorful modern office design. (© Dariusz Jarzabek - stock.adobe.com)

Striped Floors and Flickering LEDs Can Overload the Human Mind, Leaving Some With Headaches or Nausea

Striped office floors. Flickering lights. Walls covered in repetitive geometric patterns. For many people (including those who are neurodivergent or who live with migraines, epilepsy, or other neurological conditions), these everyday features of modern life are more than an eyesore. They may be causing real physical distress, and a new scientific review sets out a detailed hypothesis to explain why.

A large team of researchers from institutions across the United States, United Kingdom, Europe, Asia, and Canada has published a detailed review arguing that visual discomfort, the headaches, eye strain, nausea, and perceptual distortions that some people experience in response to certain visual stimuli, has a measurable, physical basis in the brain. The paper, published in the journal Vision, pulls together decades of research across neuroscience, architecture, lighting design, and psychology to build a unified theory of why some things are so hard to look at, and what can be done about it.

At its core, the argument is this: the human brain evolved to process the natural world efficiently. When it’s forced to handle the highly repetitive, artificially sharp, and often flickering patterns that dominate modern urban environments — think fluorescent-lit offices, car headlights, striped acoustic panels, or the dense text of a printed page — the researchers argue it may drive greater neural activity than it should, potentially placing excessive demands on the visual cortex. That metabolic overload, they hypothesize, may be what triggers discomfort, and in people with pattern-sensitive epilepsy, it can provoke seizures.

Why the Brain Prefers Nature Over Modern Design

To understand why modern environments can be so hard on the brain, it helps to know how the visual system is built. Eyes and brain alike evolved over millennia to process natural scenes, forests, rivers, coastlines, open skies. These environments share a specific mathematical pattern: their visual complexity decreases predictably as you zoom in on finer and finer details.

Natural scenes follow this rule almost universally. Modern human-made environments frequently do not. Striped wallpaper, gridded building facades, acoustic ceiling tiles, even the lines of printed text create patterns that deviate sharply from what the brain expects. And when the brain encounters something it can’t process efficiently, it doesn’t simply adapt. Brain imaging studies cited in the review show it generates stronger neural responses in visual areas, consumes more oxygen, and in some people produces pain, distortion, or worse.

“We hypothesize that the discomfort is a homeostatic response to the excessive oxygen demands of the visual cortex due to inefficient encoding of the visual stimuli,” the authors write in the paper. Essentially. the brain is sounding an alarm because it’s being overworked.

Brain imaging research cited in the review shows that uncomfortable images, particularly striped, high-contrast patterns, produce much larger responses in visual areas of the brain than natural images do. Tinted glasses chosen specifically for a patient with migraines were shown in one study to normalize that overactive brain response. Patients who viewed comfortable building images in another study showed smaller brain responses and also rated those images as easier to look at.

Who Gets Hit Hardest by Visual Discomfort

Most people experience some degree of visual discomfort at some point. But the burden is not shared equally. People who are neurodivergent, a broad term covering autism, ADHD, dyslexia, and related conditions, are disproportionately affected. So are people with migraines, epilepsy, anxiety, depression, and a range of other neurological conditions.

A possible biological explanation cuts across many of these conditions. In several of them, the brain may have a reduced ability to suppress its own overactivity, a kind of broken dimmer switch. One proposed contributor is GABA, a chemical messenger in the brain that normally acts as a brake on neural activity, though the authors note the evidence linking GABA levels to visual discomfort remains incomplete. Lower levels of that suppression, they suggest, could leave some people’s visual systems more vulnerable to overload when confronted with difficult stimuli.

A study using the Cardiff Hypersensitivity Scale, which categorized visual sensitivity into four subtypes (sensitivity to patterns, brightness, strobing or motion, and intense visual environments like supermarkets), found a consistent profile of discomfort across a wide range of diagnoses. Whether a person has autism, fibromyalgia, migraine, or a mental health condition, they tend to be bothered by the same kinds of visual input. The nature of the discomfort appears consistent across conditions, with differences mainly in how intense it gets.

Younger people are also more susceptible than older adults, as are those who experience frequent headaches.

Flicker Is Particularly Brutal

Among the many sources of visual discomfort the review examines, light flicker emerges as especially problematic. Electric lighting has always flickered, cycling on and off with the alternating electrical current that powers it. In the days of old-fashioned incandescent bulbs, the hot metal filament stayed warm enough between cycles to smooth most of this out. Gas discharge lighting in the mid-20th century was worse, and it took more than forty years before researchers confirmed that the flicker from fluorescent lighting causes headaches.

LED lighting, now standard in homes, offices, and cars, has brought new complications. Many LED systems use a dimming technique that rapidly switches the light on and off (sometimes hundreds of times per second). While this is invisible as flicker to the naked eye under normal conditions, eye movements can expose it. During a rapid eye movement, the flickering light source can paint a streak of ghost images across the retina, a phenomenon called the phantom array. People who experience migraines find this particularly distressing, and research has shown it can interfere with reading.

Car headlights also present a documented source of discomfort. Some modern car lights use temporal light modulation, rapidly switching on and off, at frequencies the review notes “can make the phantom array annoyingly visible.” A recent study cited in the review found that high-frequency temporal light modulation activates the visual cortex in measurable ways.

Designing Spaces to Reduce Visual Discomfort

One of the most actionable sections of the review is its discussion of design. Many of the changes needed to reduce visual discomfort are cost-neutral if built in from the start, the researchers argue, and it’s retrofitting that gets expensive.

An analysis of apartment building images drawn from Google found that apartment building design has moved progressively further from the natural visual patterns that the brain processes most efficiently. Repetitive grids, stark contrasts, and uniform surfaces have replaced the organic variation of earlier styles. This trend, the authors argue, may make such built environments more visually demanding, particularly for the substantial portion of the population with heightened sensitivities.

Practical recommendations include reducing contrast in unavoidable repetitive patterns, avoiding striped acoustic paneling in places like lecture halls, and using software tools now available to assess how stressful a building facade or interior might be before it’s built. On the individual level, the review discusses the evidence for colored lenses, precision-tinted glasses selected to match an individual’s specific sensitivity, as a way of reducing the brain’s overactive response to difficult visual stimuli. Colored overlays placed over text have also shown promise in some studies for people who experience visual distress from repetitive text patterns, though researchers note the mechanisms remain uncertain and not everyone is affected equally.

A Field United Around a Single Theory

This review was written by more than 30 researchers from across a wide range of disciplines (optometry, neuroscience, architecture, lighting engineering, education) following a workshop held at Birkbeck, University of London, in January 2025. For a problem that has historically been scattered across different fields, with different names and different assumed causes, the unusually broad collaboration lends weight to the hypothesis.

Visual discomfort has long been dismissed as subjective and therefore hard to take seriously. This review pushes back on that dismissal. The researchers argue that the discomfort is real and that brain imaging studies point toward a measurable physical basis for it. They conclude that addressing this will require collaboration across neuroscience, design, engineering, and education, and that, while key questions remain unresolved, enough evidence has accumulated to make a compelling case for building spaces that are less visually demanding.

Disclaimer: This article describes a review paper, meaning the authors compiled and synthesized existing research rather than conducting a new clinical trial or laboratory study. The proposed mechanism connecting certain visual stimuli to brain overload is presented as a hypothesis, not a proven causal finding. Individual responses to visual stimuli vary widely. People experiencing discomfort, headaches, or other symptoms related to visual environments should consult a qualified healthcare provider.