How to Reduce Eye Strain When You Work at a Screen All Day

Working from home tends to mean more screen time, not less. The commute that used to break up the day is gone, meetings move to video, and the same laptop is used for work in the day and entertainment in the evening. If your eyes feel tired, dry or blurry by late afternoon, you are describing what eye doctors call digital eye strain. The American Academy of Ophthalmology (AAO), the professional organization for eye physicians, publishes practical guidance on it.

1. First, the reassuring part

The AAO states plainly that looking at a computer, phone or other screen for long periods will not permanently damage your eyes. In its article on eye strain, an AAO ophthalmologist explains that eye strain does not injure the eye or cause permanent damage. It can, however, make your eyes uncomfortable, and that discomfort is worth fixing.

The AAO describes the common symptoms: blurred vision, achy or uncomfortable eyes, and dryness that can make the eyes tear or sting. It also notes that this is no different from the strain you can get from reading, writing, driving or close work like sewing for long stretches.

2. Why screens cause it: you blink less

According to the AAO, people normally blink about 15 times a minute, but studies show that rate drops to about 5 to 7 times a minute while using computers and other digital devices. Blinking is how the eye keeps its surface moist, so less blinking means drier, more tired eyes.

Using the AAO's own figures, that is roughly a half to two thirds fewer blinks during screen work. The first fix is almost too simple: make a conscious effort to blink. The AAO even suggests putting a sticky note on your screen as a reminder.

3. The 20-20-20 rule

The AAO recommends the "20-20-20" rule: every 20 minutes, look at an object at least 20 feet away for at least 20 seconds. Focusing on something distant gives your eyes a break from the close-range focusing that screen work demands.

At home, the easiest way to follow it is to set your desk so a window or the far side of a room is in view, and pair the break with something you already do, such as the moment a meeting ends or a message sends.

4. Set up the screen properly

The AAO gives specific placement guidance:

• Distance: sit about 25 inches from the screen, which the AAO describes as about arm's length.
• Angle: position the screen so your gaze is slightly downward, not straight ahead or up.
• Brightness: if the screen glows brighter than its surroundings, your eyes work harder. Match the screen brightness to the light in the room.
• Contrast: increasing screen contrast can reduce strain.
• Glare: the AAO suggests a matte screen filter if glare is a problem.

The eye strain article adds that working in a space that is too bright or not bright enough can tire the eyes, and that a vent blowing hot or cold air in your face can dry them out quickly. A home desk wedged under an air vent or facing a bright window is worth moving.

5. Dry eyes and contact lenses

For dryness, the AAO suggests artificial tears to refresh your eyes, and a humidifier if you often work in a dry, warm room.

Contact lens wearers can find dryness an ongoing problem with long screen use. The AAO's tips are to give your eyes a break by wearing glasses instead some of the time, not to sleep in contact lenses even if they are labeled extended wear, and to follow good lens cleaning practices.

6. Computer glasses, and what they are not

If you spend many hours at a computer, the AAO says prescription computer glasses may help. They are designed for focusing at intermediate distance, about 20 to 26 inches from your face, and some have multifocal lenses for shifting between near, intermediate and far distances.

The AAO is careful to note that these computer glasses are not the same thing as "blue light blocking" glasses. The eye strain article also points out that an incorrect glasses or contact lens prescription can cause blurriness that worsens the feeling of strain, so an outdated prescription is worth checking.

7. Posture is part of it

An AAO ophthalmologist notes that poor posture during tasks can cause neck, shoulder and back pain, which adds to overall discomfort that some people attribute to eye strain. If your eyes and your neck both hurt at the end of the day, the screen position fix above may help both.

8. When to see an ophthalmologist

The AAO advises seeing an ophthalmologist if your eyes are consistently red, blurry or watery, or if they become sensitive to light or painful. Its eye strain article also recommends a visit if strain continues after you have adjusted your workspace. At the appointment, describe your symptoms, when they happen and how long they last. The doctor may check for dry eye, examine your eye muscles and see whether you need a new prescription.

9. A quick end-of-day checklist

• Did you take 20-second distance breaks roughly every 20 minutes?
• Is your screen about an arm's length away and slightly below eye level?
• Does the screen brightness match the room?
• Is air blowing on your face?
• Are your glasses or contacts prescription up to date?

10. Key takeaways

• The AAO says screen use does not permanently damage your eyes, but it can cause uncomfortable digital eye strain.
• People blink about 15 times a minute normally but only 5 to 7 times a minute at screens, which dries the eyes.
• Follow the 20-20-20 rule: every 20 minutes, look 20 feet away for 20 seconds.
• Sit about 25 inches from the screen, gaze slightly downward, and match brightness to the room.
• See an ophthalmologist if eyes stay red, blurry, watery, light-sensitive or painful.