Why are your eyes exhausted by 3PM?
Dry, gritty, tired or struggling to focus after hours at a screen? We look at what's really happening to your eyes during a busy day — and what you can do about it.
Most of us don't think much about our eyes when the working day begins. But after hours of emails, spreadsheets, phones, video calls and close work, they can start to tell a different story.
Eyes may feel dry or gritty. Text can seem harder to focus on. Headaches creep in. You might find yourself rubbing your eyes, blinking deliberately or simply wanting to shut the laptop.
It is tempting to blame the screen itself, or reach immediately for a pair of blue-light glasses. In reality, there can be several different factors involved.
Start with our quick Eye Comfort Check, then read on to understand some of the common reasons your eyes can feel more tired as the day goes on.
What are your eyes telling you?
Answer seven quick questions. This isn't a diagnosis — it simply helps identify the pattern behind the symptoms you're noticing.
By the afternoon, how often do your eyes feel dry, gritty, burning or irritated?
Does blinking a few times sometimes make your vision feel clearer again?
After prolonged close work, do your eyes struggle to shift focus between your screen, phone and the distance?
Do you get headaches or aching around the eyes after reading, laptop work or other close tasks?
Do you ever find yourself holding your phone, menu or reading material further away to make it clearer?
Are your current glasses specifically designed for the distance you work at when using your laptop or desktop?
When was your last eye examination?
Screen-related dryness may be playing a part.
One clue is when discomfort or intermittent blur improves after blinking. Concentrated screen use can affect blinking behaviour, which may leave the tear film less stable and eyes feeling dry, gritty or tired.
Environment, contact-lens wear and other factors can contribute too. If symptoms are persistent, an eye examination is worth arranging rather than simply trying to mask the discomfort.
Prolonged focusing may be contributing.
Hours spent looking at a relatively fixed near distance can leave your visual system feeling tired, particularly towards the end of the working day.
Your working distance, age, prescription and the type of lenses you wear can all influence how comfortable close work feels.
Your prescription may be worth reviewing.
Headaches, prolonged eye strain or difficulty maintaining clear vision can sometimes be associated with an uncorrected or outdated prescription.
That doesn't automatically mean you need stronger glasses. An eye examination can establish whether your prescription has changed and whether your current lenses suit the distances you actually work at.
There may be more than one thing contributing.
Your answers don't point strongly to a single pattern. That's common: dryness, prolonged focusing, working distance and prescription can overlap.
Rather than assuming one particular lens or coating will fix everything, it is worth looking at how you work, how your eyes feel and whether your prescription is up to date.
Why do your eyes feel worse later in the day?
Eye fatigue often isn't caused by one dramatic event. It builds over the course of the day.
Long periods of concentrated close work can mean fewer natural breaks from focusing. At the same time, staring at a screen can alter our normal blinking behaviour. Add dry office air, heating, air conditioning, contact lenses or a prescription that needs reviewing, and discomfort can gradually accumulate.
You're concentrating for hours
Laptops, phones and tablets ask the eyes to spend long periods focused at relatively close distances.
You may be blinking differently
Concentrated visual tasks can affect blinking, which may contribute to dryness or fluctuating clarity.
Your environment matters
Heating, air conditioning and dry environments can all make irritated or dry eyes feel more noticeable.
Your glasses may not match the task
A prescription can be accurate while the lens design still isn't ideal for the distance at which you spend most of your working day.
“The right lens should solve the problem you actually have — not simply the one the marketing tells you you have.”
Do you actually need blue-light glasses?
Blue-light lenses are heavily marketed as the answer to screen fatigue, but the reasons eyes feel uncomfortable after a day at a computer can be more complicated.
If the problem is primarily dry eyes, prolonged focusing, your working distance or an outdated prescription, simply adding a blue-light filter may not address the reason your eyes are uncomfortable.
That doesn't mean every blue-light coating is pointless. It means lens choices should begin with your prescription, symptoms and lifestyle — rather than assuming that everyone who uses a laptop needs the same solution.
Your eyes after 40: what actually changes?
For many women, the 40s are the first time vision starts behaving differently — even if you've never needed glasses before.
Holding things further away?
This can be one of the first signs of presbyopia — the normal age-related reduction in the eye's ability to focus comfortably at close distances.
Eyes feeling drier?
Tear-film changes, environment, contact-lens wear and hormonal changes can all influence how dry or irritated the eyes feel.
Laptop fine, phone difficult?
Different tasks happen at different distances. A lens that works brilliantly for reading may not necessarily be ideal for a monitor sitting further away.
“I've never needed glasses before. Why now?”
Around the 40s, the natural lens inside the eye gradually becomes less flexible. As a result, the eye has less ability to change focus for close work. This is called presbyopia.
It is a normal part of ageing and eventually affects everyone to some degree. Early signs can include needing more light, holding reading material further away or finding small print more tiring towards the end of the day.
The answer isn't necessarily simply “stronger glasses”. Depending on your prescription and lifestyle, options can include reading glasses, occupational lenses or varifocals.
And what about menopause?
Hormonal changes around perimenopause and menopause can coincide with changes in tear-film stability for some women, which can contribute to dry, irritated or fluctuating vision.
If symptoms are persistent, it is worth discussing them during an eye examination rather than assuming that dryness is simply something you have to put up with.
Five things you can do today
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1Look away regularly
Build short visual breaks into long periods of close work rather than waiting until your eyes already feel exhausted.
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2Remember to blink fully
If your eyes become dry or gritty while concentrating, deliberate full blinks can be a useful reminder to reset your normal blink pattern.
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3Check your screen position
Your screen should be comfortable to view without leaning forward, craning your neck or continually changing posture to see clearly.
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4Don't ignore an outdated prescription
If your glasses are several years old and close work has become uncomfortable, an eye examination is a sensible starting point.
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5Choose lenses around your real life
Tell your optician how far away your monitor is, how much time you spend at screens and whether you move regularly between different working distances.
Not every change should be blamed on screen time.
Gradual changes in near focus and tired eyes after prolonged close work are common. But persistent symptoms are worth discussing during an eye examination.
Sudden loss or significant change in vision, new flashes or floaters, eye pain, distortion or other sudden visual symptoms should be assessed promptly by an appropriate eye-care professional.
Not sure what your eyes need?
Burghley & Co is owned and run by Scott Phippen, a UK Registered Dispensing Optician with more than 20 years' optical experience.
Send your prescription, ask about your current lenses or tell me what you're experiencing. I'll help you work out what is worth considering before you buy anything.
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