Nerd Vision: Up to 90% of Asian Schoolkids Are Nearsighted


What seems like an implausibly high figure may not be far off the mark, after all.

Flickr/Phil Roeder

Via's Alice Park, researchers believe that myopia -- nearsightedness -- affects a mindboggling share of Asian schoolchildren:

Reporting in the journal Lancet, the authors note that up to 90% of young adults in major East Asian countries, including China, Taiwan, Japan, Singapore and South Korea, are nearsighted. The overall rate of myopia in the U.K., by contrast, is about 20% to 30%.

At first glance, that number seems impossibly high -- almost unimaginably so. Could there have been a mistake? In China alone, 223 million people were 14 or younger in the latest census tally. If the research is right, that means over 200 million Chinese children suffer from poor vision. (Perhaps infants and preschoolers should be left out -- but then again, the official statistic also excludes students attending secondary school. The ballpark figure is shocking, either way.)

I called up Daniel Twelker, a research assistant professor in ophthalmology at the University of Arizona, to ask if there might be something skewing the results. Turns out, there's nothing skewing the results. That's right: as crazy as it sounds, those 200 million Chinese probably do have trouble seeing clearly.

Twelker said this research is merely the latest in a string of international studies finding widespread nearsightedness among young people.

"I've seen plenty of studies that show a prevalence of two-thirds of Asian school children, 70 percent, even up to three quarters," said Twelker. "I've definitely seen those reports, and they're quite believable. Anyway you cut it, it's a lot of kids that are myopic."

At the risk of being culturally insensitive, researchers have also noticed a link between myopia prevalence and nations that place a high emphasis on academic achievement. School attendance, urban living, and intelligence scores are all associated with greater rates of nearsightedness.

It also happens that what your mother told you about reading in the dark is true. For reasons researchers don't quite understand and may have to do with the vitamin D in sunlight, reading indoors in poor light raises the risk of myopia. Reading a lot -- over eight hours a day -- is also no good.

One Israeli study compared public school children with their counterparts in religious schools. Both boys and girls had roughly equal rates of myopia in public school. But the boys in religious school had much greater rates of myopia than any of their peers, said Twelker -- the result of as much as 10 hours of close reading a day. Girls in the religious schools, who weren't as burdened with what Twelker calls "near work," experienced about the same rate of myopia as those enrolled in public school.

Way to confirm all the stereotypes about nerds, scientists.

Jump to comments
Presented by

Brian Fung is the technology writer at National Journal. He was previously an associate editor at The Atlantic and has written for Foreign Policy and The Washington Post.

Get Today's Top Stories in Your Inbox (preview)

What's the Number One Thing We Could Do to Improve City Life?

A group of journalists, professors, and non-profit leaders predict the future of livable, walkable cities

Elsewhere on the web

Join the Discussion

After you comment, click Post. If you’re not already logged in you will be asked to log in or register. blog comments powered by Disqus


Adventures in Legal Weed

Colorado is now well into its first year as the first state to legalize recreational marijuana. How's it going? James Hamblin visits Aspen.


What Makes a Story Great?

The storytellers behind House of CardsandThis American Life reflect on the creative process.


Tracing Sriracha's Origin to Thailand

Ever wonder how the wildly popular hot sauce got its name? It all started in Si Racha.


Where Confiscated Wildlife Ends Up

A government facility outside of Denver houses more than a million products of the illegal wildlife trade, from tigers and bears to bald eagles.


Is Wine Healthy?

James Hamblin prepares to impress his date with knowledge about the health benefits of wine.


The World's Largest Balloon Festival

Nine days, more than 700 balloons, and a whole lot of hot air



More in Health

Just In