Funding for this research was provided by:
National Natural Science Foundation of China (81700884)
Wenzhou Fundamental Health Care Technology Projects (Y20180727)
Text and Data Mining valid from 2020-04-22
Received: 11 June 2019
Accepted: 13 April 2020
First Online: 22 April 2020
Ethics approval and consent to participate
: This study followed the tenets of the Declaration of Helsinki and was approved by the ethical committee of Eye Hospital of Wenzhou Medical University. Since most of the patients are far away from the hospital, it is not convenient for them to come over. Only verbal informed consent from each patient before the study by telephone was obtained, which was approved by the ethics committee.
: Not applicable.
: The authors declare that they have no competing interests.