Figure 1.

(a) In gaze-contingent displays, an opaque mask obscures the image, with the exception of a ‘window’, whose position is determined moment to moment by the recorded position of the eye or the head. (b) In asymmetrical windows, we differentiate between gaze shifts aligned with the long axis of the window, which result in inspection of areas where information is already available (1), and gaze shifts aligned perpendicular to the long axis, which result in inspection of areas where no information is currently available (2).