[losvedir]

I dunno, they seem like pretty different domains to me, despite both looking at the eye. Generating an image of the eye that's consistent across different scans in different environments but different from person to person, is one challenging problem. Figuring out where two pupils are in tandem while handling saccades and different focal depths is a different challenging problem. The former is a detailed static view of an eye. The latter is a less detailed picture of the eye itself (probably pretty easy to look at an eye and identify the pupil) but a complex dynamic algorithmic problem.

[sam_goody]

He currently has to put up with fakers, dupes that are not picked up, etc.

Once he can require you to focus on a series of letters with your eyes, it will be harder to fake, easier to pick up dupes. Aside for the fact that getting a "typing cadence" with each individual's eyes is probably valuable in and of itself.