Quick Help with Pupil Tracking

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hi everyone, i'm new , know of simple approaches accurate pupil tracking university project. i'm looking @ http://onloop.net/hairyplotter/ suggestions help. again.

did ever seen red eye picture ,, ok flash reflecting , can done irled
and track reflection ,,
i did testing on tracking ir , can test freetrack ir led tracking tool ,,
and reverse outputs in tool , can track eyeball movement tested years ago ,,
on vr stuff ,,https://www.youtube.com/watch?v=p5paozxstos



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