As an anecdote, in some modern Asian cities, you can live your life entirely indoors. You live in a small apartment above a large shopping mall and connected t

As an anecdote, in some modern Asian cities, you can live your life entirely indoors. You live in a small apartment above a large shopping mall and connected to the metro. School is indoors, book learning is prioritised over outdoor physical activity. Kids would spend their entire childhoods indoors. No wonder myopia is so prevalent.