(1) The document discusses vision-based assistive technologies for interaction using pointing gestures. (2) It describes how computer vision and image processing can track body parts like fingers, limbs, faces, and eyes to emulate mouse functions. (3) The AsTeRICS project is developing a wearable gaze tracking system to enable people with motor impairments to interact with computers using eye movements. (4) Early user tests of a remote gaze tracker prototype encountered problems with tremors but had high user acceptance. (5) Future work includes developing algorithms to reduce tremors and evaluating a head-mounted eye tracker.