Funding for this research was provided by:
Dunhill Medical Trust (R188/0211)
Guide Dogs for the Blindness Association UK (2008-5a)
Received: 15 July 2020
Accepted: 1 November 2020
First Online: 14 November 2020
Ethics approval and consent to participate
: The study was approved by the Research Ethics Committee of Queen’s University Belfast and consent was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.