So if you didn't correct for this delay, then anything that you perceived to be within 10 centimeters of you, by the time you perceived it, you would have bumped into it or just passed it.
Así, si no corrigiesen este retraso, todo lo que percibiesen que está a 10 cm a su alrededor, para el tiempo que lo percibiesen, habrían tropezado con ello  o lo habrían pasado.