Myopia - short-sightedness - is way up in Southeast Asia. About 20% of the population was myopic 40 - 50 years ago. Now it's 80%. If myopia get's really bad, you go blind.
Some think that the dramatic rise in the condition is due primarily to the emphasis on succeeding in school. Students' eyes work very hard. But that's true around the world. The problem here is that the Asian kids are not out in the sun that often; being out rejuvenates the eyes. They even take a nap at lunchtime when the sun is at its peak.
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