Having done a bit of research on what apps people are starting to develop for Google Glass, I stumbled on word of a recent Glass Hackathon where, among other things, an app was built to measure attraction:
It uses an eye tracker, mounted on the Glass frame, to measure the pupil dilation of the wearer. The idea is to measure someone’s arousal, giving an instant measure of how attracted they are to the person they are looking at.
Initially I misread this and thought it was built to track pupil dilation in someone else’s eyes, not the wearer’s. The thought of the proximity you’d have to have between your face and that of the person you’re analysing amused me greatly.
It did remind me of the sort of advice you see bandied around on the internet – “Dude if her pupils are dilating, she’s totally into you”. Dude, if you’re staring into each other’s eyes close enough to observe the dilation of her pupils, she’s probably into you.
Lastly, on a more serious note, tracking the wearer’s pupil dilation has already been patented by Google, with some people suggest it could be used to gauge your emotional response to advertising.