Article History
Received: 9 February 2021
Revised: 8 July 2021
Accepted: 22 July 2021
First Online: 6 August 2021
Competing interests
: DO’B holds non-commercial research grants with Rayner Ltd., Alcon Inc., and Avedro Inc. He is a consultant to Zeiss and Sparca Inc.
Free to read: This content has been made available to all.