Cylinder power progression associated with axial length in young children: a two-year follow-up study.

"Declarations Ethics approvalApproval from the institutional review board of Shanghai General Hospital, Shanghai Jiao Tong University was obtained (ClinicalTrials.gov Identifier: NCT03666052). ConsentThe study protocol was explained to the participants, and all participants indicated their understanding of the protocol, and oral consent was obtained. Written informed consent forms were obtained from their parents or legal guardians. Competing interestsThe authors declare they have no financial interests. Competing interests The authors declare they have no financial interests."

"Funding This study was funded by National Key R&D Program (Program No.2019YFC0840607, China); Excellent Discipline Leader Cultivation Program of Shanghai Three Year Action Plan on Strengthening Public Health System Construction (GWV-10.2-XD09, Shanghai, China); National Natural Science Foundation Young Staff (Grant No.81900911, China); Sailing Program (Program No.18YF1420200, Shanghai, China)."