AndyD,
I'm not too sure, but a lot, I believe, is the drive for academic excellence displayed by the parents without the benefit of wisdom. Kids here are driven not only by their parents and teachers but keeping up with the peers has them studying long, long hours without monitoring or forcing them to take 10 minute breaks every hour. That coupled with, in the past, large families in small flats without ample study facilities and lighting has created a whole generation of folks with severely strained eyesight. As this is also a new generation brought up in the IT and handphone world, the staring at glaring or tiny screens may have a bearing as well. Whether or not this degeneration of eyesight can be transmitted as a weakness or not I don't know, but among Asians, Singaporeans tend to be the worst, but have the highest academic averages........