Direct answer
If a screen-heavy day is leaving your eyes uncomfortable, start by taking short regular breaks, looking away from the screen, reducing glare, checking the screen position, and remembering to blink. These are comfort and workstation checks, not a diagnosis or a cure for eye problems or headaches.
If symptoms keep returning, affect your work or daily life, or you think your vision has changed, arrange an optician or GP check. Get urgent advice for sudden vision changes, severe eye pain, a very red eye, or light sensitivity with eye pain.
What this guide is — and is not
This guide is for adults who notice temporary discomfort during long spells of computer, tablet, or phone use. It is not a guide to treating dry-eye disease, migraine, glaucoma, eye infection, concussion, or any other eye or headache condition.
Long spells of display-screen work can lead to tired eyes, discomfort, temporary focusing changes, or headaches. It can also make an eyesight issue more noticeable, which is why a sensible setup and an eye test both matter.
A practical screen-break checklist
Break up the stare
Build short, regular pauses into intensive screen work. HSE guidance favours short, frequent breaks or changes of activity over fewer long breaks. Stand up, look away, or switch briefly to a non-screen task.
Look into the distance
Pick something farther away for a few moments when you pause. Some people use the 20-20-20 rule as a simple reminder: after about 20 minutes, look at something distant for 20 seconds. Treat it as a habit prompt, not a medical rule.
Check glare and brightness
Move the screen or adjust nearby lighting if reflections, a bright window, or a harsh overhead light make you squint. Aim for a screen that is comfortable to read without turning the room into a cave.
Put the screen in a sensible place
Check that the screen is stable, easy to read, and not forcing you to crane your neck. NHS dry-eye guidance suggests having the screen just below eye level; your workspace assessment can help with the rest.
Remember to blink
Concentrating on close work can make people blink less. A few deliberate blinks during a break can be a useful reset if your eyes feel dry or gritty.
Use a real change of activity
A break works best when it changes the demand: make a drink, take notes on paper, speak to a colleague, stretch, or walk for a moment. Scrolling a different app is still screen time.
Try this for one working week
- Notice when discomfort starts: time of day, task, screen, room, and symptoms.
- Set one reminder for regular short breaks during your most screen-heavy block.
- Remove one obvious source of glare or awkward posture.
- Take a short look-away break before your eyes feel properly tired.
- Track whether symptoms ease, stay the same, or appear away from screens too.
If the changes do not help, do not keep guessing indefinitely. An optician can check your eyesight and advise whether further assessment is appropriate.
When to speak to an optician, GP, pharmacist, or healthcare professional
Arrange advice if eye discomfort or headaches are persistent, worsening, happening away from screens, regularly affecting work or daily life, or accompanied by dry-eye symptoms that are not settling. An employer must arrange an eye and eyesight test for a display-screen-equipment user who asks for one.
Ask for urgent advice through an optician, GP, or NHS 111 if you have new or sudden blurred vision, double vision, flashes or floaters, a dark shadow in your vision, eye pain, a red and painful eye, or painful sensitivity to light. Call 999 or go to A&E for sudden loss of vision or severe eye pain, following NHS guidance.
What not to do
- Do not assume every headache, red eye, or vision change is caused by a screen.
- Do not use this checklist to delay an eye test or urgent advice when symptoms are sudden, severe, or unusual.
- Do not start using eye drops, blue-light glasses, screen filters, or other products as a substitute for a proper check if symptoms persist.
- Do not ignore eye pain, loss of vision, flashes, a dark curtain or shadow, or a severe sudden headache.
FAQ
Can screens cause eye strain?
Long spells of display-screen work can lead to tired eyes and discomfort. The practical response is to check breaks, glare, positioning, and eyesight rather than assume there is one cause.
How often should I take a screen break?
There is no single legal schedule for everyone. HSE advises short, frequent breaks or changes of activity rather than occasional longer breaks. Choose a rhythm you can maintain during your most intensive screen work.
Does the 20-20-20 rule work?
It can be a useful way to remember to look away and pause. It is not a diagnosis, treatment, or substitute for an eye test if symptoms persist.
Should I buy blue-light glasses?
This guide does not recommend them. Start with free checks: breaks, glare, screen position, lighting, and an eye test if you need one.
Can eye strain cause headaches?
Screen work can be associated with headaches, but headaches have many possible causes. Persistent, unusual, or severe headaches need appropriate advice rather than a screen-only explanation.
Sources and further reading
Final takeaway
Do the boring checks first: break up intense screen work, look away, reduce glare, blink, and make the setup comfortable. If symptoms keep returning or your vision changes, get the right advice rather than trying to solve it with another product.