The direction that we are going is to have just a single gaze ray for targeting. One of the reasons is that we want eye tracking to work for all, without the developer needing to be knowledgeable about different eye conditions that might require special handling. With the single gaze ray, we can take care of these kinds of complexities. XR is still in early days and there might be some gaps between where we are in some products and where we want to be, but I’ll make sure to your voice internally.
I’m sure that we can support your use case with the our eye trackers though, I wonder if it might be better to contact someone from Tobii since it seems to be a speciality market application.