Prediction: Someone's going to put two cameras into a phone and do pupil tracking. Or, can programmatic analysis get by with one? P.S. For bonus points, add

Prediction: Someone's going to put two cameras into a phone and do pupil tracking. Or, can programmatic analysis get by with one? P.S. For bonus points, add pupil dilation measurement for emotional analysis. And bloodflow including respiration (perhaps in conjunction with periodic micro-movement). Maybe three cameras? More?