Screens and Vision

We spend an average of 7-10 hours per day staring at screens. What does this mean for our eyes?

How Screens Affect Your Eyes

Near-distance fatigue — The core issue isn't the screen itself, but the close-up distance. To focus on nearby objects, your ciliary muscle must continuously contract. Prolonged contraction leads to muscle spasm and fatigue.

Reduced blinking — Blink rate drops 60-70% when focused on a screen, causing faster tear evaporation and dry eye surface.

Fixed posture — Staring at a screen means less eye movement. The 6 muscles controlling eye direction get less exercise.

Is Blue Light Really Harmful?

Probably not as bad as you think. Current scientific research does not have conclusive evidence that screen blue light directly damages the retina. Sunlight contains far more intense blue light than any screen.

The main causes of eye discomfort are near-distance focus and reduced blinking, not blue light itself. However, reducing blue light exposure before bed does help improve sleep quality.

How to Reduce Screen Impact on Your Eyes

1. Follow the 20-20-20 rule
2. Increase font size and screen brightness to comfortable levels
3. Use anti-glare screens or adjust screen angle
4. Maintain 50-70cm screen distance
5. Do regular eye exercises to keep eye muscles active