Freddy said:
  I wondered if anyone has any idea how those of us with
  Keratoconus and/or Corneal Grafts will fare if the notion of
  Iris scan identification is seriously introduced? Presumably
  the view of the Iris is altered by the disease of by the graft, or minor scar tissue.

I don't think KC per se will affect the iris image. It's
possible that after a graft a new image may prove more reliable, though it shouldn't change the iris patterns themselves.

What does concern me, though, is that apparently part of the
process is to shine a red light in your eyes, so it can check
that the pupil contracts in the light (because a "fake" trying
to beat the system wouldn't - so anyone with a false "glass
eye" will immediately trigger all the alarms!). And that might
be a problem for someone with severe light sensitivity.
  
Though what's more worrying at the moment is the prospect of
having to have one's photo taken on arrival - no doubt
flashbulbs popping all over the place and airports becoming a
no-go area (sigh!)

  
Rosemary

--
Rosemary F. Johnson