Eye tracking systems; eye tracking cameras; line-of-gaze devices combined with line of sight for mapping the focal point of a user in the field of view; line-of-gaze devices combined with forward looking camera; line-of- gaze devices combined with camera and artificial intelligence system; computer software platforms, recorded or downloadable, for gaze-and attention-based interaction, intent recognition, visual understanding, and AI- driven contextual interfaces; computer hardware and recorde...