The best screen breaks for tired eyes are short and frequent: look at something about 20 feet away for 20 seconds every 20 minutes, blink on purpose, and take a longer rest between study blocks. The American Academy of Ophthalmology recommends the first habit, and it says long screen use does not cause permanent damage, though it can leave eyes uncomfortable.
Why Do Eyes Get Tired on Long Study Days?
Eyes get tired mostly because you blink less and focus up close for hours. The American Academy of Ophthalmology says people normally blink about 15 times a minute, but only about 5 to 7 times a minute while using screens, which dries the eyes.
The Academy lists blurred vision, achy or uncomfortable eyes, and dryness, tearing or stinging as common symptoms of digital eye strain. Bright screens, glare and a poor viewing distance can make them worse. Reading printed books for long stretches strains the eyes in a similar way, so paper is not a perfect escape.
What Is the 20-20-20 Rule?
Every 20 minutes, look at an object 20 feet away for 20 seconds. The American Academy of Ophthalmology gives that advice, and it also describes the rule as a reminder to blink.
The hard part during a study session is remembering. A repeating timer on your phone, or a rule that you look up after every page or practice question, works better than good intentions. Twenty feet is roughly the far wall of a room or a view out of a window, so no measuring is needed.
Look 20 feet away for 20 seconds every 20 minutes, and blink slowly a few times while you do it.
How Do You Remember to Blink and Take Breaks?
Use a cue you cannot miss. The American Academy of Ophthalmology advises blinking consciously and often, and suggests a sticky note on the monitor as a reminder.
A repeating timer is the other reliable cue. Some students tie breaks to their study method instead: when a practice set ends or a page is finished, they look up and away before starting the next one. Whichever cue you choose, keep it light enough that you still do it on the busiest days.
What Should a Longer Break Look Like?
A longer break should take your eyes and your body away from the desk. Mayo Clinic’s care network suggests a short break from sitting about every 30 minutes, which fits neatly with the eye rest.
- Stand up and walk to a window or the next room.
- Refill your water bottle.
- Do a few gentle stretches for the neck and shoulders.
- Go outdoors for a few minutes of daylight when you can.
- Leave your phone on the desk so the break is not another screen.
How Should You Set Up Your Screen?
Place the screen about an arm’s length away and slightly below eye level, and match its brightness to the room. The American Academy of Ophthalmology gives about 25 inches as the distance, and says your eyes should gaze slightly downward.
| Setting | What to aim for |
|---|---|
| Distance | About an arm’s length, or roughly 25 inches |
| Height | Screen slightly below eye level so you gaze a little downward |
| Brightness | Similar to the light in the room, not much brighter or dimmer |
| Contrast | Increase it if text looks washed out |
| Glare | Reduce reflections from windows and lamps, for example with a matte screen filter |
Text that is easy to read means your eyes work less. Raise the text size on documents and web pages until you can read comfortably without leaning toward the screen, and raise the contrast if letters look faint. Dry rooms can also add to eye dryness, and the Academy mentions a humidifier as one way to help when the air is dry and warm.
The Academy also says that computer glasses, designed for the distance between you and a screen, are different from glasses that block blue light. If you are thinking about either, an eye doctor can tell you whether they would help you.
What Can You Do Away From the Screen?
Swap some screen tasks for paper or audio. Print a long reading, write practice answers by hand, or listen to a lecture recording while you walk.
Planning a mix of screen and non-screen tasks across the day gives your eyes natural rests without cutting study time. A study schedule that alternates a reading block, a handwritten block and a short walk is easier on the eyes than eight hours of one activity.
When Should You See an Eye Doctor?
See an eye doctor if your eyes are consistently red, blurry or watery, or if they become sensitive to light or painful. The American Academy of Ophthalmology lists those as signs to get checked.
If you wear contact lenses, the Academy suggests giving your eyes a rest by wearing glasses sometimes, never sleeping in lenses and following proper cleaning practices. This article is general wellbeing information and does not replace advice from an eye care professional.
