研究单位：[1]Shanghai Eye Disease Prevention & Treatment Center,Shanghai,Shanghai,China,200040[2]The Second Affiliated Hospital of Fujian Medical University[3]Tongji Hospital[4]Sichuan Provincial People's Hospital[5]Affiliated Eye Hospital of Shandong University of Traditional Chinese Medicine[6]People's Hospital of Ningxia Hui Autonomous Region[7]He Eye Hospital[8]First Affiliated Hospital of Kunming Medical University[9]The Affiliated Hospital of Inner Mongolia Medical University[10]The First Affiliated Hospital of Guangxi Traditional Chinese Medical University
研究目的：
The primary objective of this multi-center, observational study is to establish the reference ranges of axial length in Chinese children and adolescents. 30,000 children aged 3-18 years were examined with cycloplegia to collect their ocular parameters and were all followed up for three years with annual visits.
