The enactive approach rests its case on three main sources of empirical support. The first derives from experiments with optical rearrangement devices (ORDs), discussed in Section 2.2 above. Hurley and Noë (2003) maintain that adaptation to ORDs only occurs when subjects relearn the systematic patterns of interdependence between active movement and reafferent visual stimulation. Moreover, contrary to the proprioceptive change theory of Stratton, Harris, and Rock, Hurley and Noë argue that the end product of adaptation to inversion and reversal of the retinal image is genuinely visual in nature: during the final stage of adaptation, visual experience “rights itself”.