Play with the settings of the tobi eye tracker, or even try using its external app, if not try replugging it or if there’s not alot of lighting or visible space near the camera it cant track your face properly.
Hi. Enclosed is my setup which is currently giving excellent results.. three things helped me
Lots of tinkering around with the settings!
Using the Tobii alpha setup tool. You can see from the photo my tracker is in front of my screen, this tool enabled far more precise setup.
Noticing how much my head and eyes move when I look at things; driving for example. I realised most of my reading of the road and car is with my head movement and a little fine tuning with my eyes, news to me after 40 yea4s of driving ! I had the tobii setup the other way around initially, so it felt “wrong”
Hope this helps..