This HND piece describes the apparent wholesale increase in myopia, observed around the world. Long though to be brought on by too much close work, and these days by addiction to personal electronic devices, research over the last few years points to another etiology.
Would you believe it may result from too little time spent outdoors? Yes, that's kind of related, but the real factor here seems to be exposure to sufficient lux—which is tied into retinal development. See, kids? You should be spending more time outside!
Read the complete article.