Figure 5

Gaze and waypoint time series. Top. Horizontal gaze position (red), and saccade landing points (black dots). Vertical lines indicate when a new waypoint (potentially) becomes visible, thick cyan/blue curves indicate the waypoints. Thin grey curves indicate missing waypoint locations. Blue indicates visible waypoints in the FAR range (1.25 s < TH ≤ 2.0 s), cyan indicates waypoints in the MID range (0.5 s < TH ≤ 1.25 s; note that as a new waypoint is created, the waypoint in the FAR range moves into the MID range). Continuation of waypoint position traces to the NEAR range omitted for clarity. Note that gaze very clearly tracks the waypoints with pursuit eye movements (but only in the FAR/MID range, switching then to the next waypoint with a saccade), and what appear to be anticipatory saccades into the gap/missing waypoint (black arrows), i.e. saccades landing where the waypoint would be. Bottom. Otherwise the same time series but with vertical positions.