A flashed arrow can drag your attention somewhere before your eyes even move

In 1980, Michael Posner had people fix their gaze on a center point while an arrow briefly flashed left or right, then respond to a target that popped up on one side. Correctly-cued targets were spotted faster, wrongly-cued ones slower, proof that attention is a "spotlight" you can move around your visual field without moving your eyes. The Posner cueing task is still the standard way researchers measure how attention shifts, and how that shifting breaks down after brain injury.

— Michael I. Posner, Orienting of Attention — Quarterly Journal of Experimental Psychology, 1980