---
title: "Digital eye strain (computer vision syndrome)"
description: "What digital eye strain is, why screens tire the eyes, and the simple habits like the 20-20-20 rule that ease it. Plain-language and clinically reviewed."
url: https://eyehealthguide.org/conditions/digital-eye-strain/
source: Eye Health Guide
licence: "General information only. Cite the URL and the named medical reviewer."
---

Condition

# Digital eye strain (computer vision syndrome)

Medical reviewer [Mr Mohamed Mohyudin](https://eyehealthguide.org/reviewers/mohamed-mohyudin/)· Last recorded site review July 6, 2026

### About this review

This page inherits the site’s previous review record. A separate, current article sign-off has not yet been recorded.

[How review works](https://eyehealthguide.org/reviewers/) · [Official biography & credentials](https://mohamedmohyudin.co.uk/author/mohamed-mohyudin/)

Quick answer

Digital eye strain is tired, dry or achy eyes and sometimes headaches from long periods looking at screens. It is common and not harmful to the eyes long-term. Regular breaks, blinking, good screen setup, and treating any dry eye or focusing problem usually relieve it.

### On this page ⌄

1. Your next step
2. What it is
3. Common symptoms
4. Causes and risk factors
5. Self-care and prevention
6. Related conditions
7. Related symptoms
8. Treatments & Surgery
9. Frequently asked questions

## What it is

Digital eye strain, also called computer vision syndrome, is a group of symptoms caused by prolonged screen use. It does not cause lasting damage to the eyes, but it can be uncomfortable and affect concentration during the day.

## Common symptoms

Symptoms build up during or after screen time.

- Tired, sore or aching eyes
- Dry or gritty eyes from reduced blinking
- Headaches and difficulty focusing
- Temporary blurred vision or neck and shoulder ache

## Causes and risk factors

We blink less and focus at a fixed close distance when using screens, which tires the focusing muscles and dries the surface of the eye. Glare, poor lighting, small text, and an uncorrected glasses prescription all make it worse.

## Self-care and prevention

Simple habits make a big difference: follow the 20-20-20 rule by looking at something 20 feet away for 20 seconds every 20 minutes, blink fully and use lubricating drops, position the screen slightly below eye level, reduce glare, and make sure your glasses prescription is up to date.

## Related conditions

## Related symptoms

## Treatments & Surgery

## Frequently asked questions

### Is digital eye strain harmful?

Digital eye strain is uncomfortable but does not cause lasting damage to the eyes. Symptoms ease with breaks, blinking, and a better screen setup.

### What is the 20-20-20 rule?

Every 20 minutes, look at something about 20 feet away for 20 seconds. This relaxes the focusing muscles and helps reduce screen-related eye strain.

### Do screens damage your eyes?

Current evidence suggests screens cause temporary strain rather than permanent damage in adults. In children, more outdoor time is encouraged to help reduce the risk of short-sightedness.

Your next step

## Take this to your appointment

Write down what has changed, when it started, your current medicines and the questions you want answered. Take these to your eye-care appointment.

Sudden loss of sight, severe eye pain or a dark curtain across vision needs immediate assessment. Do not wait to complete a worksheet.

## Sources for this information

These references support the information on this page. Follow the linked source for its full context.

- [American Academy of Ophthalmology EyeWiki - Digital eye strain](https://eyewiki.aao.org/Computer_Vision_Syndrome_%28Digital_Eye_Strain%29)