Aiming is not a single reflex; it is a complex, closed-loop sensorimotor chain consisting of three distinct physiological phases:
Your eyes detect target coordinates in peripheral vision and execute a high-speed ballistic eye jump (saccade) to center the target on the fovea centralis.
Your motor cortex commands arm and wrist muscles to accelerate the mouse toward the target, covering 90–95% of the distance in a fraction of a second.
Visual feedback confirms exact crosshair alignment. Fine fingertip pressure guides the crosshair to the center before actuating the click.
Elite competitive FPS players (and Formula 1 drivers undergoing peripheral vision reaction drills) minimize the micro-correction phase by training their initial ballistic flick to hit target centers with sub-millimeter precision.