Extended use of mobile phones can lead to blurry vision, a condition often attributed to digital eye strain or computer vision syndrome (CVS). Several factors contribute to this phenomenon:

1. Prolonged Focus on a Small Screen

When you focus on a small screen for extended periods, your eyes continuously strain to maintain clarity and detail. This constant effort can fatigue the eye muscles, leading to blurry vision.

2. Blue Light Emission

Mobile phones emit blue light, which can penetrate deep into the eye and contribute to digital eye strain. Blue light exposure is known to disrupt the circadian rhythm and can cause discomfort and visual fatigue.

3. Reduced Blink Rate

While using mobile phones, people tend to blink less frequently. Blinking is essential for lubricating the eyes and maintaining moisture. A reduced blink rate can lead to dry eyes, causing irritation and blurred vision.

4. Poor Posture and Viewing Distance

Holding a mobile phone too close to the eyes or at awkward angles can strain the eye muscles. Proper posture and maintaining an appropriate distance from the screen can help reduce this strain.

5. Glare and Screen Brightness

Glare from screens and high brightness levels can force the eyes to work harder to process images, contributing to visual discomfort and blurriness.

6. Uncorrected Vision Problems

Existing vision problems, such as nearsightedness, farsightedness, or astigmatism, can be exacerbated by prolonged mobile phone use, making it difficult to maintain clear vision.

Tips to Prevent Blurry Vision

1. Take Regular Breaks: Follow the 20-20-20 rule—every 20 minutes, look at something 20 feet away for at least 20 seconds.
2. Adjust Screen Settings: Reduce screen brightness and avoid glare by adjusting the screen position or using an anti-glare screen protector.
3. Blink Frequently: Make a conscious effort to blink often to keep your eyes moist.
4. Maintain Proper Distance: Hold your mobile device at a comfortable distance, about 16-18 inches away from your eyes.
5. Use Blue Light Filters: Activate blue light filters or use blue light-blocking glasses to reduce strain.

By understanding these factors and adopting healthier screen habits, you can mitigate the effects of digital eye strain and maintain clearer vision even with prolonged mobile phone use.