Today, more than 2 billion people are already nearsighted. ___1___ The crisis has already started, and it’s accelerating faster than most people realize. There are no silver bullets, but the solutions we do have are practical, proven, and already in use in some countries. Here’s what can help:
(1) Increase daylight exposure
___2___ Studies show that just two additional hours of outdoor time per day can reduce the risk of developing myopia (近视) by up to 50%. In countries like Singapore and China, some schools have already begun holding classes outdoors or under brighter lighting conditions indoors to mimic this effect.
(2) Limit screen time under age 5
The World Health Organization advises that children under the age of 5 should not exceed one hour of screen time per day. ___3___ Why? Because screen use for a long time at close range encourages sustained near focus, something young eyes are not designed for a long duration. ___4___
(3) Follow the 20-20-20 rule
This one applies to all of us — not just kids. The rule is simple: for every 20 minutes of close-up work (like staring at a screen), take a 20-second break to look at something at least 6 meters (20 feet) away. It sounds trivial, but this helps relax your eyes. ___5___ Even small nudges like this can add up over time to protect your vision.
A. For children under 2, ideally, it should be avoided altogether.
B. By mid-century, we’re looking at close to 5 billion.
C. Sunlight plays a protective role in how our eyes grow.
D. If you have perfect vision, it’s hard to understand what myopia feels like.
E. It also usually replaces outdoor activity, reducing exposure to protective daylight.
F. You can set an alarm to remind yourself to take breaks at regular intervals.
G. One of the clearest patterns behind rising myopia rates is intense academic workload.
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