>>11814995>>11815006This was my thought, too, but they cover this in the paper:
>Environmental factors are known to play a key role in myopia risk. There are well-established links between myopia and urbanization, lack of time outdoors, reduced light exposure, socio-economic status, prenatal factors, near work, and educational attainment5,6,7,8,9,10,11,12. The latter is particularly well replicated in populations around the world3,13,14,15 and may reflect a number of predisposing factors; less time outdoors whilst studying, more time on near work activities, or higher intelligence.They further claim that this is not the only factor and that genetics somehow play a role.
