Computer screens significantly impact eye health, primarily due to changes in blinking and eye exposure. Here's a breakdown of the effects:
The Impact of Computer Screen Use on Eyes
Prolonged computer use can lead to various eye-related problems. The primary issue stems from the fact that we alter our natural blinking pattern when focusing on a screen. This change, combined with the screen's glare and our usual straight ahead gaze, can contribute to discomfort.
Reduced Blinking
When we focus on a computer screen, our blink rate dramatically decreases. According to the reference, computer use causes a decrease of blinking to almost one third of normal. This reduced blinking is a key factor in several eye problems, as it means the eyes are not being lubricated as often as they should be.
Increased Exposure
Looking at a computer screen typically involves a straight-ahead gaze. This position means that more of the eye's surface is exposed to the air. Combine this with less blinking, and the eye dries out much faster than usual. This increased dryness can lead to discomfort, itching, and a gritty sensation, especially for contact lens wearers.
| Issue | Explanation |
|---|---|
| Reduced Blinking | Blinking decreases to about one-third of normal levels when using a computer. |
| Increased Eye Exposure | The straight-ahead gaze required for computer use exposes more of the eye to the air, leading to dryness. |
Problems Caused by Computer Use
- Dry eyes: The most common complaint is dryness, itchiness, and a gritty feeling in the eyes.
- Eye strain: Focusing for long periods can cause eye muscles to become tired, resulting in eye strain and headaches.
- Contact lens discomfort: Reduced blinking makes contact lenses feel uncomfortable and can exacerbate eye dryness.
What You Can Do
Here are a few things you can do to minimize these negative effects:
- Take frequent breaks: Use the 20-20-20 rule – every 20 minutes, look at something 20 feet away for 20 seconds.
- Blink consciously: Make an effort to blink more often while working at a computer.
- Use lubricating eye drops: Artificial tears can help keep your eyes moist.
- Adjust your screen: Position your screen so that your eyes are looking slightly downward, and adjust the brightness to a comfortable level.
- Use an anti-glare screen: This can reduce the amount of light reflecting off the screen and causing eye strain.
