Accelerated loss of crystalline lens power initiating from emmetropia among young school children: a 2-year longitudinal study.

"National Key R&D Program; Municipal Human Resources Development Program for Outstanding Young Talents in Medical and Health Sciences in Shanghai; Shanghai Sailing Program; Key Discipline of Public Health–Eye Health in Shanghai; Three‐year Action Program of Shanghai Municipality for Strengthening the Construction of the Public Health System (2015‐2017)"

"The study population included 1465 children enrolled in the Shanghai Time Outside to Reduce Myopia (STORM) trial. The STORM trial was a 2‐year, school‐based, prospective, cluster‐randomized study conducted from 2016 to 2018. Primarily, it was designed to determine the effect of outdoor time on the onset and progression of myopia. The methodology of this trial has been presented in detail elsewhere. In brief, school children (grades I–II) aged 6–8 years were enrolled and monitored annually over a 2‐year period (He et al., ). The trial was approved by the Shanghai General Hospital Ethics Committee and adhered to the tenets of the Declaration of Helsinki (ClinicalTrial. Gov Identifier: NCT02980445). The trial involved 6,295 children from 24 schools randomized to three groups (control and test groups I and II with outdoor intervention) from October 2016 to December 2018. Informed consent was provided by the parents or legal guardians of all children who participated in the trial."