In our hyper-connected world, screens play a central role in our lives. Whether for work, leisure or social interaction, it's hard to escape them. However, after several hours in front of a computer, phone or tablet, many of us notice a disturbing phenomenon: blurred vision. But why does this happen?
Digital eye strain
The main reason for blurred vision is a problem called digital eye strain. When you stare at a screen for long periods, your eyes must constantly adapt to changing brightness levels, contrast and small font sizes. This intense strain can lead to symptoms such as:
• Temporary blurred vision
• Dry or irritated eyes
• Headaches
• A sensation of tension around the eyes
The role of blinking
On average, a person blinks 15 to 20 times a minute. But this number drops to 5 to 7 blinks per minute in front of a screen. The result? Insufficient lubrication of the eye surface contributes to dryness and blurred vision.
Constant focusing
Our eyes aren't designed to stare at a close focus for hours on end. Looking at a screen requires a sustained effort to maintain focus. Over time, the eye muscles tire, causing temporary difficulty in switching from near to far vision.
How can you reduce these symptoms?
Here are a few tips to protect your eyes:
• Adopt the 20-20-20 rule: every 20 minutes, look at an object 20 feet (about 6 meters) away for 20 seconds.
• Adjust your screens: Position them about 50 to 70 cm from your eyes, with a slightly downward angle.
• Blink consciously: take regular breaks and remember to blink more often.
• Use artificial tears: if your eyes are often dry, consult an Optometrist for suitable drops.
• Adjust your lighting: Avoid reflections and adjust the brightness of your screens so that they are not too bright.
When should you consult an Optometrist?
If blurred vision persists or is accompanied by eye pain, redness or any other unusual symptom, it's essential to consult an Optometrist. A thorough eye examination will determine whether other factors, such as refractive errors or eye health problems, contribute to your symptoms.
By taking good care of your eyes and adopting good screen practices, you can reduce eyestrain and maintain clear vision, even after a long digital day.
