Saw SM, Hong RZ, Zhang MZ, et al. Near-work activity and myopia in rural and urban schoolchildren in China.

Saw SM, Hong RZ, Zhang MZ, et al. Near-work activity and myopia in rural and urban schoolchildren in China. J Pediatr Ophthalmol Strab 2001;38:149–55. These authors found results similar to Hepsen, Evereklioglu, and Bayramlar in a study of second-grade children in China. Children in city schools had an average near-work time of 2.2 hours per day and a 19.3% prevalence of myopia, as compared with children in the countryside who had 1.6 hours of near work per day and had a 6.6% rate of myopia. This study also did not control for parental myopia, which is likely to be more prevalent in the parents of educated students and in the Chinese who live in cities. Thus, further study to evaluate each of these conditions is necessary.