Vision disorders
Computer vision syndrome: digital eye strain and the 20-20-20 rule
Computer vision syndrome (CVS), or digital eye strain, comes from long hours in front of a computer, smartphone or other screen without proper breaks or adjustments. A few simple habits make a big difference.
Symptoms of computer vision syndrome
- Eye strain or fatigue
- Dry or itchy eyes
- Blurry or double vision
- Headaches, especially after long screen time
- Difficulty focusing on nearby objects
- Neck, shoulder or back pain from poor posture
How to reduce digital eye strain
Follow the 20-20-20 rule
Every 20 minutes, take a 20-second break and look at something 20 feet away.
Adjust your screen settings
Increase text size, reduce screen brightness and set a comfortable contrast.
Get the lighting right
Reduce glare on your screen with soft ambient lighting and a well-arranged workspace.
Use computer glasses
Glasses designed for screen work can reduce eye strain when you use digital devices.
Keep a good posture
Sit with your back straight, shoulders relaxed and your screen at eye level.
When to see an eye care professional
If you still have symptoms after changing your habits, an eye care professional can find the cause and suggest solutions to make screen use more comfortable.
Frequently asked questions
When to go to a hospital instead
Go to the nearest hospital emergency department immediately if you have:
- Sudden loss of vision
- Flashes of light or a shower of new floaters
- Eye injury or chemical splash
- Severe eye pain or a very red, painful eye
- Double vision that comes on suddenly