In the age of smartphones, Japanese schoolchildren's eyesight is worst on record, health ministry finds | The Japan Times

(www.japantimes.co.jp)

From elementary to high school, children in Japan are breaking records for bad eyesight, an education ministry health survey showed Friday. […] According to the survey results, children with uncorrected vision of less than 1.0 on the Japanese acuity scale account for 34.6 percent of elementary school students, 57.5 percent of junior high school students and 67.6 percent of high school students — all record highs.

Sounds like a solid reason to not provide the addictive little devices until later in life. That said, it’ll be a hard sell with kids and parents …