Funding for this research was provided by:
the Science Research Foundation of Aier Eye Hospital Group (AF2018003, AM1909D2, AR1909D2)
Received: 28 January 2020
Accepted: 1 July 2020
First Online: 31 July 2020
Ethics approval and consent to participate
: The research protocol was established according to the ethical guidelines of the Helsinki Declaration. Written informed consent was obtained from individual participants.
: Written informed consent for publication was obtained from all participants.
: HY is an Associate Editor of BMC Ophthalmology. No other disclosures were reported.