Hi @madmanmike, thanks for your query. When the valid-flag is set to false, the XR SDK can’t accurately determine the eye position.
his can be due to for example blinking, bad positioning inside the headset, sharp angles, glasses frames hiding the eye, heavy makeup, etc.
Our recommendation is to not use data where the accompanying valid-flag is set to false, because we can’t be sure that the data is trustworthy.
Hope that clarifies our position, please let us know if we can offer any further information. Best wishes.