Received: 10 December 2021
Revised: 15 March 2022
Accepted: 31 March 2022
First Online: 20 April 2022
: This study was approved by the Institutional Review Board of Eye Hospital of Shandong First Medical University, China. No personally identifiable information was collected in this study. The requirement for informed consent from patients was also waived.
: The authors declare no competing interests.