Computer vision syndrome

Computer vision syndrome: screen time without tired eyes

Hours on a computer or phone can leave your eyes tired, dry and blurred, and give you headaches or a stiff neck. This is called digital eye strain, or computer vision syndrome. Screens don't damage the eyes, but the way we use them can make them uncomfortable — and a few changes help a lot. [R20]

Written by Dr. Praveen Kumar · Reviewed by Dr. R. K. Rasmi Praveen · Last reviewed 25 September 2026
Optometrist fitting precision prescription eyeglasses and spectacle frames in optical dispensary

What causes it

  • We blink much less when we concentrate on a screen, so the eyes dry out.
  • Glare and poor lighting.
  • A screen that is too close, too high or too low.
  • An uncorrected or out-of-date glasses prescription.
  • Posture that strains the neck and shoulders.

Simple changes that help

  • Follow the 20-20-20 rule: Every 20 minutes, look at something about 20 feet (6 metres) away for 20 seconds. [R20]
  • Blink on purpose: and use lubricating drops if your eyes feel dry. [R20]
  • Set your screen: about an arm's length away, with the top at or slightly below eye level. [R20]
  • Reduce glare: adjust lighting, use a matte screen filter, keep the screen clean.
  • Keep documents: at the same distance as the screen to avoid constant refocusing.

Do I need computer glasses?

If you already wear glasses, they may be set for distance or reading rather than the distance of your screen. Glasses designed for your working distance — single-vision or progressive — can make a real difference. Special blue-light-blocking lenses aren't needed to protect your eyes; it's breaks, blinking and the right prescription that matter most. [R21]

When to get help urgently

If eye strain comes with frequent headaches, double vision or blurred vision that doesn't settle, book an eye examination to rule out other causes.

Who treats computer vision syndrome here

Dr. Praveen Kumar

Consultant Ophthalmologist

Questions patients ask

Does screen time cause permanent eye damage?

No. Digital screen use causes fatigue, dryness, and muscle strain, but does not cause permanent damage to healthy eyes. [R20]

Do blue-cut lenses reduce eye strain?

Scientific studies show that proper working distance, scheduled breaks, and the correct glasses prescription matter much more than blue-light filters. [R21]

References

[R20] American Academy of Ophthalmology, Computers, Digital Devices and Eye Strain (2020); [R21] Cochrane Database of Systematic Reviews: Blue-light filtering spectacle lenses (https://www.aao.org/eye-health/tips-prevention/computer-usage).