Funding for this research was provided by:
Health Department of Zhejiang Province (2018KY542)
Received: 3 February 2020
Accepted: 16 June 2020
First Online: 19 July 2020
Ethics approval and consent to participate
: Ethics approval (2017–5-Q-4) was provided by the Ethics Committee of the Eye Hospital of Wenzhou Medical University, and informed consent was obtained from the parents.
: The authors approved the final manuscript for submission.
: The authors declared that there is no conflict of interest.