I was very excited to hear this is a potential verticle. The first thing that popped into my mind was...
Google Secures Patent for Glucose-Sensing Contact Lens
http://diatribe.org/google-secures-patent-glucose-sensing-contact-lens
or
http://www.inquisitr.com/2394717/google-diabetes-contact-lenses-testing-to-begin-tests-glucose-level-in-patients/
Disclaimer: I'm not in anyway saying there is a link with POET and Google on this project
Just pointing out the fascinating possibilities.