The short answer
Using a screen for a long time can make your eyes feel tired, dry, sore or temporarily blurry. Current College of Optometrists guidance does not show that normal screen use causes permanent eye damage. Screen work can still make an existing issue more noticeable, such as dry eye, a prescription that no longer suits your work distance, or difficulty keeping the eyes comfortably focused at close range.
Digital eye strain is a useful everyday label for this group of symptoms. It is not a diagnosis. An eye examination is the right place to work out whether screen discomfort may be related to your vision, eye surface or another issue.
Why can computer work make your eyes feel tired?
Screen work often means sustained attention at one distance. You may blink less often while concentrating, which can leave the front surface of the eye feeling dry or scratchy. The National Eye Institute’s dry-eye guidance notes that computer, tablet and smartphone use can contribute to dry-eye symptoms; burning, redness, light sensitivity and blurry vision can also occur with dry eye.
The screen itself is not the only factor. Small text, glare, reflections, a screen positioned awkwardly, tiredness and a long stretch without looking elsewhere can all make close work feel harder. A prescription that works well for driving may not be the most comfortable option for a particular computer distance. Equally, tired eyes after computer work do not automatically mean that you need new spectacles.
What symptoms are worth noticing?
People describe digital eye strain in different ways. You may notice tired or sore eyes, a dry, gritty or burning feeling, watery eyes, headaches, blurred vision that comes and goes, or difficulty concentrating after close work. These symptoms are not specific to screen use, so it is sensible to notice when they happen, how long they last and whether they are becoming more frequent.
If symptoms settle after a break, that is useful information, but it is not a diagnosis. Persistent discomfort, repeated headaches, double vision or a change in how clearly you see should be discussed with an optometrist rather than managed by simply buying a screen accessory.
What practical changes can make screen work more comfortable?
Simple changes are often a sensible starting point. The 20-20-20 rule is an easy reminder: about every 20 minutes, look at something roughly 20 feet away for about 20 seconds. The National Eye Institute suggests this kind of regular break for long computer use.
- Make the text large enough to read without leaning forward or squinting.
- Place the screen at a comfortable distance and keep it slightly below eye level where practical. The College of Optometrists suggests a distance of about 40 to 75 cm.
- Reduce distracting reflections. Close a blind, reposition a lamp or adjust the screen brightness and contrast to suit the room.
- Blink deliberately when you notice your eyes feel dry, especially during concentrated tasks.
- Change position and take a brief movement break. The South African Department of Employment and Labour’s digital-work checklist includes adequate lighting, avoiding inconvenient reflections and making time for regular breaks as part of a workable setup.
These are comfort measures, not treatment for every cause of eye symptoms. If you use lubricating drops, ask an optometrist or pharmacist which option is appropriate for you, especially if symptoms continue or you wear contact lenses.
Do blue-light glasses prevent screen-related eye strain?
Blue-light filtering lenses are often marketed for computer use, but the evidence does not support treating them as a proven answer to eye strain. A 2023 Cochrane review found that, compared with non-blue-light filtering lenses, they may not reduce short-term eye strain from computer use. The review also found that effects on sleep were uncertain and that the included trials did not establish protection for retinal health.
That does not make a blue-light filter harmful or rule out personal preference for a particular lens tint. It does mean it is worth separating a preference from a medical promise. If you need spectacles for your prescription or task, the most useful choice depends on your visual needs and an optometrist’s advice, rather than a claim that a lens will protect your eyes from a screen.
Could dry eye or a prescription be part of the picture?
Yes. Screen work can make dry-eye symptoms more obvious, but dry eye has several possible contributors. The National Eye Institute lists factors such as age, contact-lens wear and some health conditions among those that may be relevant. A change in prescription, a focusing or eye-coordination issue, or an eye-surface problem can also make close work uncomfortable. Only an assessment can distinguish these possibilities for an individual.
Tell the optometrist what device you use, how far away it usually sits and when your symptoms occur. That context helps determine what assessment is appropriate. You can also read what happens during a comprehensive eye examination before booking.
When should I arrange an eye examination sooner?
Arrange an eye examination if screen discomfort keeps returning, affects your work or study, does not improve with sensible breaks, or comes with a noticeable change in vision. Seek prompt medical assessment for sudden vision loss, new flashes or many floaters, a curtain or shadow in your vision, severe eye pain, eye injury, chemical exposure, marked redness with light sensitivity, or new neurological symptoms. These signs are not typical digital eye strain and should not wait for a routine appointment.
Request an eye examination in Pierre van Ryneveld
If tired eyes after computer work are becoming a regular problem, request an eye examination with Pierre van Ryneveld Optometrist in Centurion. You can call 012 662 0188, WhatsApp 061 592 8356 or visit Shop 9, Ryneveld Lifestyle Centre, 75 Ryneveld Avenue, Pierre van Ryneveld, Centurion, 0157. Bring your current spectacles and explain the screen task that is bothering you. If you wear contact lenses, remove them at home and arrive wearing your glasses unless the practice gives different instructions for your appointment.
This article provides general eye-health information and does not replace an eye examination or individual medical advice. If you are concerned about your vision or eye health, consult an appropriately registered healthcare professional.
Frequently asked questions
Can screens damage my eyes?
Current guidance does not show that normal screen use causes permanent eye damage. Long periods of close screen work can still feel uncomfortable and may make dry-eye or vision symptoms more noticeable. A new or persistent problem deserves assessment rather than assumptions about the screen.
Why are my eyes dry after computer work?
Concentrating on a screen may reduce blinking, which can leave the eye surface less comfortable. Dry eye can also have other contributors, so recurring dryness, redness or blurry vision is worth discussing during an eye examination.
Does the 20-20-20 rule work?
It is a practical reminder to take regular short breaks from sustained close work. It may help comfort, but it does not diagnose or treat every reason for eye symptoms.
Do I need blue-light filtering glasses for my computer?
Not necessarily. Current Cochrane evidence does not show that blue-light filtering lenses reduce short-term computer-related eye strain. An optometrist can advise whether your prescription or task calls for a particular spectacle option.
Should I use my normal glasses for computer work?
Your usual spectacles may be suitable, but this depends on your prescription, screen distance and work. If you are leaning in, tilting your head or still uncomfortable, bring the spectacles to an eye examination for an individual assessment.
