An elegantly designed set of experiments by Coren 1986 examined the role of efferent readiness in the visual perception of direction and extent. Coren’s experiments support the hypothesis that the spatial parameter controlling the length of a saccade is not the angular direction of the target relative to the line of sight, but rather the direction of the center of gravity (COG) of all the stimuli in its vicinity (Coren &amp; Hoenig 1972; Findlay 1982). Importantly, 