We are unable to see everything. Attention, our ability to filter, select and modulate information, allows us to interact efficiently with the world. We employed a non-invasive brain stimulation technique, the Transcranial Magnetic Stimulation (TMS), to manipulate in humans the activity of a key area of the attentional network, the right Frontal Eye Field (FEF). Our work focuses on the characterization with diffusion MRI of anatomical connections and their role underlying the modulation of visual perception. We first introduce previous behavioral, physiological and anatomical findings and the techniques used in our work. We then present evidence showing an improvement of visual performances tied to activity patterns consisting in either single pulses or frequency-specific rhythmic TMS bursts (30Hz) applied over the right FEF, prior to the onset of a visual target. We also examine whether inter-individual differences in white matter connectivity could influence the modulatory role that the FEF exerts on visual perception. We describe a fronto-tectal pathway connecting the FEF with the superior colliculus and show that the probability of connection between these two sites in the right hemisphere influences the FEF contributions to visual detection. We also characterize the three branches of the superior longitudinal fasciculus connecting frontal and parietal lobes and demonstrate an influence of its first branch in the right hemisphere on visual modulation induced by frequency-specific TMS bursts. Our results suggest a crucial role in the modulation of visual perception of the anatomical connectivity to synchronize areas of a network at a specific frequency.