Quite distressingly common.
>"9 out of 10 employers rate blind and partially sighted people as either 'difficult' or 'impossible' to employ" (DWP, 2004) [0]
Which is stupid beyond belief to anyone who spends much time with folks who have a visual impairment. Just off the top of my head I can think of a barrister, a librarian, a bunch of IT and development types and several qualified and practicing tennis coaches who are VIPs. And that's just out of my personal acquaintances.
So while I almost bounced off this for the tone, in the end the tl;dr is 'we overcame our bias and it turned out to be no biggie'. As someone who spends a lot of time working to generate positive PR for VI I'll take this as a net gain.
[0] https://actionforblindpeople.org.uk/about-us/media-centre/ke...