SymptomEyes & vision
Eye Strain: Symptoms, Causes and Relief
Eye strain is the tired, sore, burning or heavy feeling in the eyes that comes after long periods of focusing, such as screen use, reading or night driving. It often brings blurry vision, dry eyes and a headache across the forehead or temples. It is not harmful and eases within an hour or so of resting your eyes. Strain that keeps returning usually means uncorrected vision, dry eye or poor screen setup, while eye pain with redness or vision loss is not eye strain and needs prompt care.
Also called: Tired eyes, eye fatigue, asthenopia, sore eyes
At a glance
- What it is
- Discomfort and tiredness of the eyes after sustained visual work.
- Common symptoms
- Sore or burning eyes, dryness, blurred vision, headache, neck ache.
- Common causes
- Screens, reading, uncorrected vision, dry eye, poor lighting, glare.
- How long
- Usually eases within 30 to 60 minutes of rest.
- Relief
- 20-20-20 breaks, blinking, artificial tears, correct glasses, better lighting.
When to get help
Call 911 or go to the ER
- Sudden loss of vision, a curtain over part of your vision, or a sudden shower of floaters and flashes
- Severe eye pain with redness, halos around lights, headache and vomiting
- Sudden double vision with drooping eyelid, face droop, weakness or slurred speech
See a doctor within a day or two
- A red, painful eye with light sensitivity or discharge, especially if you wear contact lenses
- Eye pain or blurred vision after an injury or chemical splash
- Headache that is new, severe, or worse in the morning with vomiting
Book a routine appointment
- Eye strain that occurs daily or is not relieved by rest
- Squinting to read, holding things farther away, or frequent headaches with close work
- Persistent dry, gritty eyes
- Double vision that only appears when tired or reading
Usually safe to manage at home
- Tired, dry or slightly blurry eyes after a long day at a screen, which settle with rest
Eye strain symptoms
Eye strain symptoms build up during visual work and are worse at the end of the day:
- sore, tired, burning or itchy eyes
- dry eyes, or, paradoxically, watery eyes
- blurry vision that clears with blinking or rest
- difficulty refocusing from near to far
- a dull headache across the forehead, temples or behind the eyes
- heavy eyelids and a need to close your eyes
- increased sensitivity to light and glare
- neck, shoulder and upper back aches from posture
- difficulty concentrating
Causes of eye strain
Screens
Digital devices are the most common cause. When you look at a screen you blink about a third to half as often as normal, the tear film dries out, and your focusing muscles hold one distance for long periods. Glare, small text, poor contrast and a screen that is too close or too high add to the strain.
Uncorrected or outdated vision
- Farsightedness (hyperopia) and astigmatism: the eyes work harder to focus, especially up close.
- Presbyopia: from the early 40s, the lens loses flexibility. Reading becomes tiring and you hold things farther away.
- An old prescription, or glasses not suited to screen distance.
Dry eye
Dry eye causes burning, grittiness and fluctuating blurry vision that is worse with screens, air conditioning, wind and contact lenses. It is more common with age, after menopause and with some medicines.
Eye coordination problems
Trouble keeping both eyes aligned on close objects (convergence insufficiency) causes strain, words that "move" on the page and double vision with reading. It is a common cause in children and teenagers.
Environment
- dim lighting or harsh overhead light
- glare from windows or bright screens in a dark room
- reading in a moving vehicle
- night driving with oncoming headlights
- fans or vents blowing at your face
Is it eye strain or something else?
| Symptom | Eye strain | Consider instead |
|---|---|---|
| Headache | Dull, forehead, after visual work | Throbbing with nausea and light sensitivity: migraine |
| Eye pain | Mild ache | Severe pain with redness: acute glaucoma, uveitis, keratitis |
| Blurry vision | Clears with blinking or rest | Persistent blur: refractive error, cataract, eye disease |
| Double vision | Only when tired, reading | Constant or sudden: nerve or brain problem |
| Red eye | Mildly pink | Very red, discharge: conjunctivitis, infection |
How eye strain is diagnosed
An optometrist or ophthalmologist will ask about your work, screen time and symptoms, then:
- check your vision at distance and at near and screen distances
- do a refraction to see if glasses would help
- test how your eyes focus and work together
- examine the tear film and front of the eye for dry eye
- check eye pressure and the back of the eye to rule out other conditions
How to relieve eye strain
- Follow the 20-20-20 rule: every 20 minutes, look at something 20 feet (6 meters) away for 20 seconds.
- Blink fully and often. Make a habit of a few slow, complete blinks during breaks.
- Use artificial tears (preservative-free if using more than 4 times a day).
- Position your screen about an arm's length away (20 to 28 inches, 50 to 70 cm), with the top at or just below eye level.
- Reduce glare: match screen brightness to the room, use matte screens, and keep windows to the side rather than behind or in front of you.
- Enlarge text and increase contrast.
- Get your eyes tested and wear the right glasses for the distance you use most. Computer glasses or office lenses help many people over 40.
- Warm compresses for 5 to 10 minutes can ease tired, dry eyes.
- Take longer breaks every 1 to 2 hours.
Blue-light-blocking glasses have not been shown to reduce eye strain, and screens do not damage the eyes.
For a fuller look at digital eye strain as a condition, its causes and workplace prevention, see computer vision syndrome.
Eye strain in children
Children rarely complain about eye strain directly. Watch for rubbing eyes, headaches after school, avoiding reading, losing their place on a page, covering one eye, or sitting very close to screens. These can point to a vision problem that glasses can fix. Encourage outdoor time, which also lowers the risk of nearsightedness.
Frequently asked questions
What are the symptoms of eye strain?
Common symptoms are tired, sore, burning or itchy eyes, dryness or watering, blurred vision, difficulty refocusing, headache around the forehead or temples, light sensitivity and neck or shoulder ache. They build during visual work and ease with rest.
Can eye strain cause headaches?
Yes. Eye strain often causes a dull, aching headache across the forehead, temples or behind the eyes, usually later in the day after screen use or reading. Uncorrected vision is a common cause. Severe or new headaches, or headaches with vision loss or vomiting, need medical assessment.
How long does eye strain last?
Eye strain usually eases within 30 to 60 minutes of resting your eyes and is gone after a night's sleep. If symptoms persist for days, return quickly every time you read, or come with pain or vision changes, see an eye care professional.
Can eye strain damage your eyes?
No. Eye strain is uncomfortable but does not cause permanent damage. However, frequent strain can be a sign of an uncorrected vision problem or dry eye that is worth treating, and children with eye strain may need glasses to see comfortably at school.
How can I relieve eye strain quickly?
Look away from the screen at a distant object for 20 seconds, blink fully several times, use lubricating eye drops, and adjust your screen brightness and distance. A warm compress over closed eyes for a few minutes also helps. Short breaks every 20 minutes prevent it returning.
Sources
This guide was written from current patient and clinical guidance, including:
- American Academy of Ophthalmology: Eye strain - symptoms and causes
- American Optometric Association: Computer vision syndrome
- Mayo Clinic: Eyestrain
- NHS: Eye strain and tired eyes
- National Eye Institute: Refractive errors