I n this paper, we propose a method for controlling mouse pointers o n unknown computer displays by the face motions of computer users viewed f r o m uncalibrated cameras.Especially, we show that by considering a f i n e bases o n computer displays, we can derive one-to-one correspondences between gaze positions o n displays and the projections of face features in images.T h e proposed method is implemented and tested in real t i m e experiments.