Aglioti et al. suggested from their experiments on a version of the Ebbinghaus illusion that:

Question

Quizplus · Accepted Answer

Aglioti et al.'s experiments indicated that while the Ebbinghaus illusion affects conscious perception, the visual mechanisms responsible for scaling grip size in preparation for object interaction are not deceived by the illusion. This suggests a dissociation between the visual processing for perception and for action.

Aglioti Et Al