Received: 22 November 2020
Accepted: 12 February 2021
First Online: 5 March 2021
Ethics approval and consent to participate
: Permission to perform this study was granted by Moorfields Eye Hospital NHS Foundation Trust Audit committee review board (reference number: CA16/AD/19). As this was a retrospective study with data collected through the audit process using anonymised notes and analysis of clinical data accumulated as part of their usual clinical care, informed consents were waived.
: Not applicable.
: I declare that the authors have no competing interests as defined by BMC, or other interests that might be perceived to influence the results and/or discussion reported in this paper.