Screen & Visual Sensitivity

'Screen use' covers very different activities, and the demanding elements differ between them. Things people describe as part of the difficulty include:

• Brightness and glare — a screen that feels harsh at settings that were never a problem before
• Contrast — stark white pages with dark text feeling harder than muted or consistent ones
• Scrolling — the movement of content itself, quite apart from what is written on it
• Motion and video — moving images, animations, autoplay content demanding more than still pages
• Flashing or rapidly changing content — which can be difficult regardless of the person's overall screen tolerance
• Small text — where straining to read adds cost the content does not justify
• Long reading sessions — where the difficulty is cumulative rather than immediate
• Dense layouts — busy websites, forms with many fields, pages crowded with competing elements
• Switching between tabs — each move costing a re-settling of visual attention
• Video calls — faces, movement, self-view and sound concentrated into one activity
• Visually busy websites generally, compared with simple, static layouts
• Holding visual attention — the sustained effort of keeping eyes and mind on the screen at all

The effects people describe vary in kind and intensity, and may include:

• Headache or head pressure
• Dizziness, or a swimmy feeling with scrolling or moving visuals
• Nausea
• Eye discomfort — strain, aching, or eyes that water and tire unusually quickly
• Increased brain fog
• Difficulty concentrating on content that is, on paper, simple
• Feeling visually overwhelmed — too much on the screen to know where to look
• Needing to stop reading partway through, not from boredom but from the visual effort of continuing
• Worsened tolerance of other input afterwards — light, noise and conversation feeling harder than they did before the screen session

For some people the cost is also delayed, in the way other forms of exertion can be: an afternoon of reading may be paid for that evening or the next morning. This page does not diagnose any visual disorder — it describes what people with ME/CFS commonly report, and what may help practically.

One of the most useful things to know about screen sensitivity is how unevenly it applies. Someone may be able to send a short message but not read a long article; join an audio call but not a video call; check a reply but not scroll a feed. The differences are real and consistent for many people, and they matter because 'screen use' as a single category hides them.

• Checking a message — usually possible — versus scrolling social media, which may combine brightness, movement and endless novelty in a way a short message does not
• Reading a short email versus completing an online form, which adds small text, dense fields, timed sessions and decisions into one task
• An audio call versus a video call, where the second adds faces, movement and self-view to the same conversation
• One screen task at a time versus several tabs open, where each switch re-costs the settling of visual attention
• Using a phone briefly for something specific versus watching a long video, where brightness, motion and sustained attention all stack

This unevenness is why questions like 'can you use a screen?' rarely have a single answer. The more accurate question is which screen activities, for how long, at what time of day — and that is also a more hopeful framing, because it points to where choice still exists.

None of these treat ME/CFS, and none of them is being recommended as a way of improving the illness — they are adjustments that some people find reduce the cost of tasks that still need doing:

• Larger text — increasing the default size rather than straining to read at the previous setting
• Reduced brightness and warmer colour settings, where comfortable
• A simplified display — fewer tabs, less on screen at once, simpler reading views where a site offers one
• Short sessions — several small screen tasks spread through the day rather than one long sitting
• Audio alternatives — voice notes instead of typing, a phone call instead of a video call, audiobooks and read-aloud features where they suit the task
• Printed information for things that do not need to be on a screen — a letter, a form, a recipe on paper
• Saving content for later rather than pushing through — articles and videos keep
• Reducing motion and animation in device settings, where possible, and closing pages with autoplay video
• Turning off unnecessary notifications, so the screen stops volunteering input
• Reading one section at a time rather than an entire page or document in one pass

What suits one person may not suit another, and tolerance on a given day is a better guide than any fixed rule. The aim is to keep useful things possible, not to build a stricter life around the screen.

For some people, particularly during severe flares or at very severe levels of illness, screen tolerance may be extremely limited or absent during worse periods — too bright, too fast, or simply too much to process for weeks or months at a time. For others at this level, brief and specific use may remain possible: a short voice note, a message read with the brightness at its lowest, one line of text at a time.

Because so much of life's administration and connection sits behind a screen, losing it is a significant loss in its own right, and it deserves to be treated as one. People in this position often find workarounds that keep the essentials moving — audio for news and books, printed letters instead of email, someone trusted handling screen-based tasks on their behalf. For supporters, the most useful help is often unglamorous: reading a message aloud, printing something off, filling in a form for someone, keeping someone included in ways that do not require them to look at a screen.

Screen and visual sensitivity can feel like a small symptom described in a very modern sentence — but it sits directly across the path of work, study, appointments, banking and friendship, which makes its effects far larger than the symptom itself. The practical response is flexibility: smaller doses, easier formats, audio where it fits, printed where it helps, and no requirement to push through visual discomfort for things that can be done another way. Adjusting screen use is a reasonable accommodation of a real symptom — at home, at work, in education and in healthcare alike.