When I retired I left my microscope for another engineer. I do wish I would have brought it home, it was a option for me. I looked back through my old files and don't see any edge images. Sort of surprises me I don't have edge images.
I wouldn't have spent so much time looking at knife edges if the scope wasn't sitting in my office. A very nice Zeiss stereoscope (both eyes open) I picked up at our surplus equipment.
Would be nice to set one up at a big knife show and let people examine their edges. I suspect you could sell lots of sharpeners that way.