Screens and your eyes
Digital Eye Strain: How the 20-20-20 Rule Gives Tired Eyes a Break
Long screen sessions make you blink less, which can leave eyes dry and tired. The American Academy of Ophthalmology suggests the 20-20-20 rule: every 20 minutes, look at something at least 20 feet away for at least 20 seconds. Eye strain does not cause permanent damage, and no supplement has been shown to replace screen breaks.
Written by the Zeaxan editorial teamUpdated · 7 min read
The basics
What is digital eye strain?
Digital eye strain is the tired, dry feeling that comes after long stretches of close focus on a screen. When you focus for a long time, you blink less, and your eyes can dry out (AAO, eye strain).
It is common, and it is usually a comfort problem rather than a disease. Long reading sessions can do the same thing as a phone or laptop (AAO, dry eye).
The fix starts with habits, not pills. The best known habit has a name that is easy to remember.
Three twenties
How does the 20-20-20 rule work?
Every 20 minutes, look at something at least 20 feet away for at least 20 seconds. The American Academy of Ophthalmology suggests it as a simple way to rest eyes that have been focused up close (AAO, eye strain).
Every 20 minutes
Set a quiet timer, or pause at the end of each email or page.
Look 20 feet away
A window, a far wall or the end of a hallway all work.
For 20 seconds
Long enough to let your focus relax. Blink a few times while you look.
Twenty seconds feels long the first few times. A sticky note on the screen edge is a cheap reminder until the habit sticks.
Sort it out
Is it eye strain or dry eye?
They overlap, and screens can bring on both. Strain is tiredness from close focus; dry eye means the eyes do not make enough tears or the right kind of tear film (AAO, eye strain) (AAO, dry eye).
| Screen eye strain | Dry eye | |
|---|---|---|
| How it feels | Tired, dry eyes after long focus | Stinging, burning, a gritty feeling, blurred vision |
| Common causes | Focusing for long periods without blinking | Aging, long screen or reading sessions, some medicines |
| First steps | 20-20-20 breaks | Artificial tears and other options from an eye doctor |
| Lasting damage? | No, per AAO | Ask your eye doctor if it keeps coming back |
If burning or grit lasts after you rest your eyes, mention it at your next exam. Some medicines can cause dry eye, so bring your list (AAO, dry eye).
Plan your day
How do you fit screen breaks into a workday?
Tie breaks to things you already do. The dial shows one way to lay out a day with screen hours and a once-daily supplement.
- Mid-morning, about 10:30
Take 2 capsules between breakfast and lunch, as the label says, with a glass of water.
- Or mid-afternoon, about 3:30 pm
Pick one time and keep it, so you never take a second serving by mistake.
- Screen hours: 20-20-20 breaks
Every 20 minutes, look at something 20 feet away for 20 seconds.
- Medicines at their own times
If you take a blood thinner, thyroid medicine or metformin, ask your pharmacist first.
The label serving is 2 capsules a day between meals; the times are examples. Screen breaks (AAO, eye strain); blood thinners (NCCIH, ginkgo); thyroid medicine (MSD Manual, bacopa).
If you take Zeaxan, the label says 2 capsules daily between meals. Pick one time and keep it, and keep your screen breaks either way. More on timing in how to use Zeaxan.
Try Zeaxan for 90 days2 capsules a day · 3 bottles per pack · today's price on the listing
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Can staring at screens damage your eyes for good?
No. Eye strain leaves no permanent damage, according to the American Academy of Ophthalmology (AAO, eye strain). Breaks and blinking are the usual first steps for the discomfort.
Pills and screens
Can an eye supplement fix screen eye strain?
No supplement in our sources has been shown to ease screen strain. The proven steps are behavioral: breaks, blinking and treating dry eye if you have it (AAO, eye strain) (AAO, dry eye).
The Zeaxan bottle says "Supports Comfort", and the eBay listing says it "keeps your eyes feeling fresh" (eBay listing). Those are the seller's words. No trial has tested this blend for comfort or anything else.
If you choose to try an eye supplement, treat it as an extra, not a replacement for 20-20-20 breaks. Read how we check each seller claim on the benefits page.
Know the signs
When should eye strain send you to an eye doctor?
Book a regular exam if strain, blur or dryness keeps coming back. Go the same day for sudden changes, because those are not eye strain.
- No eye exam yet and you are 40 or older: book a baseline exam (AAO, 2021).
- Over 65: an exam every one to two years (AAO, 2021).
- Diabetes: a dilated eye exam at least once a year (NEI, diabetic eye).
Sudden flashes of light, many new floaters at once, a shadow in your side vision or a gray curtain over part of your vision need an ophthalmologist right away (AAO, retina).
See how often to get an eye exam and our eye health guide.
FAQ
Screen eye strain questions
What is the 20-20-20 rule for eyes?
Every 20 minutes, look at something at least 20 feet away for at least 20 seconds. The American Academy of Ophthalmology suggests it to rest eyes that have been focused up close on a screen or page for a long time (AAO, eye strain). A timer or sticky note helps you remember.
Can screen time cause permanent eye damage?
No. According to the AAO, strain from screens does not cause lasting harm to the eyes (AAO, eye strain). Tired, dry eyes after screen use usually ease with rest and breaks. Sudden changes such as flashes, many new floaters or a curtain over your vision are different and need same-day care (AAO, retina).
Why do my eyes burn after using the computer?
You blink less when you focus on a screen, so your eyes can dry out (AAO, eye strain). Dry eye can sting, burn or feel gritty, and long screen sessions, aging and some medicines can all play a part (AAO, dry eye). If it keeps happening, tell your eye doctor.
Do eye drops help with screen eye strain?
Artificial tears are one of the options used for dry eye, which often comes with long screen sessions (AAO, dry eye). Ask your pharmacist or eye doctor which kind suits you, especially if you already use other eye drops. Keep taking 20-20-20 breaks as well.
Does Zeaxan help tired eyes from screens?
No trial has tested it. The bottle says "Supports Comfort" and the listing says it keeps eyes feeling fresh, but those are the seller's claims (eBay listing). Screen breaks and dry eye care are the steps with evidence behind them (AAO, eye strain) (AAO, dry eye).
How often should I take a break from my screen?
Every 20 minutes, for at least 20 seconds, looking at least 20 feet away (AAO, eye strain). Short, regular breaks are the whole point of the rule. Linking them to natural pauses, such as sending an email, makes the habit easier to keep through a workday.
Is blurry vision after screen time normal?
Blurred vision is one symptom of dry eye, which long screen sessions can bring on (AAO, dry eye). Blur that does not clear, or that comes on suddenly, needs an eye exam. Sudden blur with flashes, floaters or a shadow needs an eye doctor the same day (AAO, retina).
Who wrote this
Written and reviewed by
Plain-language pages built from the bottle label and linked medical sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by an authorized U.S. retailer, not by the manufacturer. We are paid a commission when you buy through our order links.
Keep reading
More about Zeaxan
Eye health guide
Exams by age, AMD, cataracts, glaucoma, diabetes, warning signs and screen strain, in plain language.
Read moreBenefits
Each Zeaxan benefit claim in the seller's words, set next to what research actually shows.
Read more
Eye exam schedule by age
A plain adult eye exam schedule, from the baseline exam at 40 to yearly dilated exams with diabetes.
Read moreUSA authorized Zeaxan retailer
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