The effect of the Müller–Lyer configuration on saccadic eye movements is not fully due to illusory perception

Abstract

The Müller–Lyer illusion affects both perception and oculomotor control, but it is unknown whether these effects arise from the same or different underlying mechanisms. We developed a modified version of the Müller–Lyer configuration, which largely reduced the perceptual illusion effect compared with the typical configuration but reduced the saccadic effect to a much less extent. Such difference indicates that influence of the Müller–Lyer configuration on saccadic eye movements is not fully mediated by illusory perception.