Outdoor activity and myopia progression in 4-year follow-up of Chinese primary school children: The Beijing Children Eye Study

Yin Guo, Li Juan Liu, Ping Tang, Yan Yun Lv, Yi Feng, Liang Xu and Jost B Jonas

PLOS ONE, 2017, vol. 12, issue 4, 1-14

Abstract: Purpose: To investigate factors associated with ocular axial elongation and myopia progression during a 4-year follow-up in primary school children in Beijing. Methods: This school-based study included 382 grade-1 children at baseline in 2011 (age:6.3±0.4 years) with 305 (79.8%) returning for the follow-up examination in 2015. At baseline and in yearly follow-up examinations, the children underwent a comprehensive eye examination including auto-refractometry, ocular biometry with measurement of axial length, and fundus photography. The parents underwent a standardized interview. Results: During the study period, the mean axial length elongated by 1.15±0.56mm in boys and 1.10±0.63mm in girls. At baseline and at the end of follow-up, axial length was significantly (P

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0175921

DOI: 10.1371/journal.pone.0175921

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