Funding for this research was provided by:
Tianjin Research Program of Application Foundation and Advanced Technology (13JCYBJC21500)
Article History
Received: 8 November 2018
Accepted: 4 June 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: This study was approved by the ethics committee of Tianjin Eye Hospital (No. TJYYLL-2015-15), and all procedures were performed in accordance with the Declaration of Helsinki. All patients provided voluntary informed consent to participate in the study. Written consent was obtained from the participants.
: Not applicable.
: The authors declare that they have no competing interests.