Computer Vision Syndrome: How screens affect your visual comfort

25 June 2026

The use of computers, smartphones, tablets, and other electronic devices has become an essential part of our daily lives. However, spending long hours in front of a screen can lead to a variety of visual discomforts collectively known as Computer Vision Syndrome (CVS) or Digital Eye Strain.

It is estimated that millions of people experience symptoms related to prolonged screen use, especially those who work in offices, study, or rely on digital devices for much of the day.

What is Computer Vision Syndrome?

Computer Vision Syndrome is a group of eye- and vision-related problems that result from prolonged use of digital devices.

It is not a specific eye disease, but rather a condition caused by the extra visual demands placed on the eyes when focusing on digital screens for extended periods.

The severity of symptoms often depends on factors such as screen time, lighting conditions, viewing distance, and the presence of uncorrected vision problems.

What are the most common symptoms?

• Eye fatigue
• A feeling of heaviness in the eyes
• Temporary blurred vision
• Dry eyes
• Burning or itching eyes
• Redness
• Excessive tearing
• Light sensitivity
• Headaches
• Neck, shoulder, or back pain caused by poor posture

These symptoms often worsen throughout the day and usually improve after resting the eyes.

Why does it happen?

Several factors contribute to Computer Vision Syndrome, including:

• Reduced blinking
• Continuous focusing at a close distance
• Poor ergonomics
• Uncorrected vision problems

How can you prevent Computer Vision Syndrome?

Follow the 20-20-20 Rule

Every 20 minutes, look at an object about 20 feet (6 meters) away for at least 20 seconds.

This simple habit helps relax the eye muscles responsible for focusing.

Blink More Often

Consciously remembering to blink more frequently helps keep the eyes lubricated and reduces dryness.

Optimize Your Workstation

• Keep your screen 20 to 28 inches (50–70 cm) away.
• Position the monitor slightly below eye level.
• Increase the font size to avoid straining your eyes.
• Minimize glare and reflections on the screen.

Maintain Proper Lighting

The room should be comfortably lit, avoiding excessive contrast between the screen and the surrounding environment.

Take Regular Breaks

Standing up, stretching, and giving your eyes a short break throughout the day can significantly reduce discomfort and help maintain visual comfort.