Outdoor activity during class recess reduces myopia onset and progression in school children.
Ophthalmology. 2013 May 1;120(5):1080-5.
Re: Wu et al.: Outdoor activity during class recess reduces myopia onset and progression in school children (Ophthalmology 2013;120:1080-1085).
Ophthalmology. 2014 Apr 1; 121 (4): e20.