We can track each eye individually. I’ve been searching the office for our 3D glasses but they seem to be lost and it’s not superhigh on the todo list of hardware QA.
3D glasses uses an active shutter system(Active shutter 3D system - Wikipedia) so techwise/theoretically it might work, assuming we get the data while one of the glasses is closed.
Unfortunly i cannot tell you a straight answear regarding this and untill the 3D glasses we have here shows up i can’t test it out myself either. 
If i do find them i’ll post about it again for sure!
The EyeX has a quite a fast calibration, it’s based of profiles and each profile(so you can switch between users easily) is calibrated by looking at 9 spots on the screen. It’s over and done in 20seconds and only needs to be done once per user.
In short, it’s very pain-free to calibrate. The calibrate process is also exposed in the API’s since our last engineupdate 1.1.0
http://developer…com/eyex-1-1-0-and-eyex-sdk-1-2/