A brightly lit supermarket aisle, a striped wall, a busy office or a flickering screen may seem ordinary to most people. For others, these visual settings can trigger eyestrain, headaches, nausea, difficulty concentrating or a powerful sense of discomfort.
New research suggests that these reactions may reflect more than personal preference. Certain features of modern, human-made environments could place excessive demands on the visual system.
The findings come from an international review published in the journal Vision. The paper brings together evidence from psychology, optometry, clinical neurology, architecture, engineering and visual neuroscience.
Its central message is straightforward, many modern spaces contain patterns, contrasts and lighting conditions that the human brain may not process as efficiently as the visual patterns commonly found in nature.
The researchers say this mismatch may help explain why some people feel distressed in places that others barely notice. Repetitive lines, high-contrast surfaces, clutter, glare, rapid flicker and densely packed displays can all contribute to visual discomfort. The effect may occur at work, in schools, on public transport, in shops, at home or while using digital devices.
Visual discomfort is a broad term. It can describe mild tiredness after reading, difficulty keeping text in focus, discomfort under artificial lighting or an urge to look away from a particular pattern. In more severe cases, it may involve migraines, dizziness, visual distortions or a feeling of sensory overload. These symptoms are real, even when the visual environment appears harmless to other people.
The review, led by researchers at the University of Stirling with collaborators from more than 20 institutions, examines how the brain responds to visual information. It focuses on the relationship between the structure of an image and the amount of neural activity needed to process it. The researchers argue that discomfort may arise when visual scenes contain patterns that are unusually demanding for the brain.
Natural scenes, such as forests, landscapes, coastlines and rocks, tend to have a particular statistical structure. Their visual information is spread across different sizes of detail in a relatively regular way. In image analysis, this is often described as a pattern. Put simply, natural scenes usually contain fewer fine details than broad features, following a predictable mathematical relationship.
The human visual system has evolved while processing natural environments. This does not mean that every natural scene is relaxing or every built environment is harmful. It does suggest that the brain may be especially efficient at handling the spatial patterns that occur frequently in nature. When a scene departs sharply from those patterns, neural processing may become less efficient.
Many designed environments depart from that natural balance. A wall covered in evenly spaced stripes, for example, contains repetitive information at particular visual scales. So do tightly packed rows of shelving, office blinds, tiled floors, corrugated surfaces and certain types of acoustic panelling. These designs can produce a strong and narrow pattern of visual stimulation.
The review includes Fourier analyses of images to illustrate this point. Fourier methods break an image into its underlying spatial frequencies, revealing how much information is present at different scales and orientations. Natural scenes generally show a smooth decline in image amplitude as spatial frequency increases. Repetitive indoor structures often show pronounced deviations from that pattern.
Those deviations may matter because some images stimulate groups of neurones in the visual cortex of the brain more strongly than others. If many neurones respond in a highly synchronised or inefficient way, the brain may need to work harder to interpret what it sees. That extra processing demand could be experienced as discomfort, fatigue or strain.
The research does not suggest that one pattern will cause the same response in every person. Sensitivity varies substantially. Some people may find striped designs mildly unpleasant. Others may experience little effect. A smaller group may develop significant symptoms, particularly when they are exposed for long periods or when several visual stressors occur together.
People with migraine may be particularly vulnerable. Migraine is not simply a severe headache. It can involve heightened sensitivity to light, contrast, motion and visual patterns. During an attack, or in the period before one begins, ordinary lighting and visual detail can become difficult to tolerate. The review indicates that certain visual environments may contribute to discomfort in people already prone to migraine-related sensory sensitivity.
The researchers also highlight potential relevance for autistic people, individuals with attention-deficit hyperactivity disorder, dyslexia or photosensitive epilepsy. These conditions are not the same, and they should not be treated as if they share a single cause. Yet some people within these groups report greater sensitivity to light, visual clutter, flicker or high-contrast patterns.
For people with photosensitive epilepsy, flickering lights and certain repetitive visual stimuli can be medically significant because they may provoke seizures in susceptible individuals. For others, the consequences may be less acute but still disruptive. A crowded retail display may lead to rapid fatigue. Bright digital interfaces may make reading difficult. Harsh lighting in a classroom could reduce comfort and concentration.
The review is especially relevant to public spaces because modern life increasingly involves intense visual exposure. Digital screens are now present in workplaces, schools, transport systems, hospitals, retail settings and homes. Open-plan offices often combine computer displays, reflective surfaces, overhead lighting, visual clutter and movement. These elements can accumulate over the course of a day.
Supermarkets offer a familiar example. Their shelves are designed to display large quantities of products in colourful packaging, often arranged in repeated rows. Lighting is bright to support visibility and sales. Promotional signs compete for attention. For many shoppers, this is merely busy. For people with heightened sensory sensitivity, it can be exhausting.
The same principle applies to digital design. Interfaces with flashing notifications, high contrast, densely packed controls, animated banners and fast-moving content may be visually demanding. The research does not call for bland or colourless screens. Instead, it supports more thoughtful choices about brightness, contrast, spacing, motion and the use of repetitive patterns.
Print materials may also benefit from greater attention to visual comfort. Some readers struggle with text presented against highly contrasting or visually distracting backgrounds. Tight line spacing, glare from glossy paper, dense layouts and patterned pages can make reading feel more difficult. Clear typography, adequate spacing and restrained visual decoration can improve accessibility for a wide range of users.
Architecture is another important area. Buildings are often judged by appearance, cost, energy use, safety and functionality. The review argues that visual comfort should be considered from the earliest stages of design. This could include choices about façade patterns, lighting placement, surface finishes, floor designs, wayfinding systems and the density of visual information in shared spaces.
The aim is not to ban stripes, bright colours or visually rich architecture. Nor does the evidence support a universal rule that all repetitive designs are harmful. Context matters. Viewing distance matters. Duration of exposure matters. Individual health and sensory sensitivity matter. The strongest practical message is that designers should recognise visual comfort as an accessibility issue, rather than an afterthought.
Small adjustments could make a meaningful difference. Lighting systems can reduce unnecessary flicker and glare. Retail environments can offer calmer routes or lower-stimulation hours. Schools can consider how wall displays, window blinds and screen use affect pupils. Employers can provide adjustable lighting, less cluttered workstations and display settings that suit different visual needs.
Health professionals may also find the review useful. People reporting visual strain are sometimes told that their symptoms are vague or difficult to explain. The evidence summarised in this new study offers a clearer framework. Visual discomfort may result from an interaction between a person’s sensory sensitivity and the properties of the environment they are viewing.
That does not mean every headache or episode of fatigue has a visual cause. Persistent headaches, changes in vision, neurological symptoms or seizures require appropriate medical assessment. Still, recognising environmental triggers may help some people reduce avoidable strain. A person who repeatedly feels unwell in a particular setting may benefit from noting the lighting, patterns, screen conditions and visual density involved.
The research also underlines a broader point about inclusive design. Accessibility is often associated with ramps, lifts, signs and physical access. Sensory accessibility deserves similar attention. A space can be technically usable while remaining uncomfortable for people who are sensitive to light, motion, clutter or repetitive visual structures.
Researchers involved in the review say the work creates a shared basis for future investigations across several disciplines. More research is needed to identify which visual features are most problematic, how effects differ between individuals and which design changes produce the greatest benefit in real settings. Laboratory evidence is valuable, though everyday environments are more complex than controlled images on a screen.
The authors also stress the importance of linking mathematical descriptions of images with biological models of visual processing. This approach could help explain why some patterns are uncomfortable before designers build them into workplaces, products or public spaces. It may eventually support practical tools that assess the visual demands of interiors, signs, screens and printed materials.
For now, the study offers a compelling reminder that seeing is not always effortless. The brain is constantly sorting shapes, colours, contrast, movement and detail. In a world filled with screens, bright lighting and manufactured patterns, some environments may demand more from that system than they appear to.
A well-designed space should do more than look impressive. It should allow people to read, work, travel, shop and rest without unnecessary visual strain.
The review published suggests that this goal is not merely aesthetic. It is part of making everyday life more comfortable, equitable and accessible.
The post Why Modern Design Can “Stress” Your Brain and Make You Feel Uncomfortable first appeared on PP Health Malaysia.
