Andrew McKay wrote:

Blunket himself could not be iris scanned for example.


Are you sure about that? His blindness might be caused by a problem
involving the optic nerve which passes from the eyeball thru to the brain.

It is nothing to do with him being blind (although that may impact the
mechanisms that try to verify the eye is "live") - it it to do with
uncontrollable eye movements. There are a number of medical conditions
that cause this even in fully sighted people.

I don't know about these things but I wouldn't have made an assumption
that just because people are blind it would limit their ability to be
tested.

In itself blindness does not rule out iris scans... but much depends on
the cause of the blindness. Not having eyes for example would be a
pretty good non starter.

Also, iris testing? I thought the ID cards relied upon a fingerprint of
the back wall of the eye? The Iris is at the front.

Iris scans and retinal scans are two very different things. The latter
is far harder to do quickly however without sophisticated medical
scanning kit - not at all well suited to a quik ID check.

--
Cheers,

John.

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