What Is Computer Vision Syndrome?

Computer vision syndrome (CVS), also called digital eye strain, is a group of eye and vision problems from prolonged computer, tablet, and phone use. Symptoms include dry eyes, headaches, blurred vision, neck and shoulder pain, and difficulty focusing. It affects 90% of office workers and is caused by reduced blinking, screen glare, poor viewing distances, and uncorrected vision problems.

The Stats

90% of office workers have computer vision syndrome. That's not a typo. If you work at a computer all day, you almost certainly have at least some symptoms. The question is how severe they are and whether you've noticed them.

The Symptoms

  • Eyestrain and discomfort
  • Dry, gritty, or burning eyes
  • Headaches (often behind the eyes or at the temples)
  • Blurred or double vision
  • Difficulty focusing when looking away from the screen
  • Increased sensitivity to light
  • Neck and shoulder pain (from poor posture while viewing)

Why It Happens

Reduced Blinking

Normally you blink about 15-20 times per minute. When staring at screens, you blink about 5-7 times per minute. Less blinking = drier eyes.

Screen Glare and Contrast

Screens are harder to read than paper. The pixels, glare, and contrast create more visual work for your eyes.

Viewing Distance and Angle

Most people view screens too close or at the wrong angle, forcing their eyes to work harder.

Existing Vision Problems

Even minor uncorrected vision issues get magnified by computer use. That slight astigmatism you never noticed? It's a problem after 8 hours of screen time.

Is It Permanent?

No. Computer vision syndrome symptoms typically resolve with rest. The problems come from the ongoing strain, not permanent damage. However, chronic strain can make symptoms worse over time. Prevention and management matter.

What Helps

  • Follow the 20-20-20 rule (every 20 min, look 20 feet away for 20 sec)
  • Consciously blink more
  • Use lubricating eye drops
  • Adjust screen position and lighting
  • Get regular eye exams
  • Consider computer glasses if needed

Read our detailed guide on how to reduce eye strain from computers.

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