Hi Jenny!
Thanks for your support. When building and running, and setting the resolution properly to the native resolution of the display (or actually to any resolution is seems), the problem was resolved. However, when running within Unity using the ‘play’ button, there is an offset (you must gaze up and to the left to get the box to rotate).
Thanks for the help, sorry for threatening to give up on Tobii so easily!
Is it normal that the eye tracking should have an offset when in ‘play’ mode within Unity?