In article , Brian Gaff \(Sofa\)
wrote:
Yes well, I'd be too. Back when I was a child some home or other remote
venues were used for eye tests, if the room dimensions were too small, a
mirror was used and a mirror image letter chart was hung behind the
patient so they could see it in the mirror. It worked well. Brian

That technique is still used in 'proper' venues. Certainly in my local
Specsavers.

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle