Hi @generalfault, I am afraid that there is not a way to tell the interactor to ignore the child object, as the gaze stream event being used is using builds on Gaze Aware, which is hierarchical: ie parent elements have focus if children have focus.
If you only want to know if the up or down arrow has gaze focus (or the actual list box item as well of course), you can just use the HasFocus (or HasActivationFocus/TentativeActivationFocus) properties or corresponding callbacks and only get simple events for that, you don’t need to use the actual gaze points for anything. For that, there is even built-in xaml support if you don’t want to use code behind. Hopefully this answers your question!