 "Covert orienting" is the act of mentally shifting one's focus without moving one's eyes.Simply, it is changes in attention that are not attributable to overt eye movements.Covert orienting has the potential to affect the output of perceptual processes by governing attention to particular items or locations (for example, the activity of a V4 neuron whose receptive field lies on an attended stimuli will be enhanced by covert attention) but does not influence the information that is processed by the senses.