Davide Crivelli (1-2) , Federico Cassioli (1-2) , Marco Grassi (3) , Michela Balconi (1-2)

1 – International Research Center for Cognitive Applied Neuroscience – IrcCAN, Catholic
University of the Sacred Heart, Milan, Italy
2 – Research Unit in Affective and Social Neuroscience, Department of Psychology, Catholic
University of the Sacred Heart, Milan, Italy
3 – Family Vision Center – VTE, Sesto San Giovanni (MI), Italy

Background: The efficiency of association between vision, sensorimotor integration, and
attention depends on a large network of cortical-subcortical structures. Given the
interconnection of sensory and cognitive functions, an alteration of incoming visual
information flow may lead to compensation syndromes, which could hinder higher
cognitive skills such attention regulation. In the clinical field, prismatic lenses have been
used in treating altered postural patterns, sensory integration deficit, and spatial neglect.
Yet, their potential as empowerment tools is still unexplored.
Aims: This study aimed at investigating the potential of a sensory empowerment protocol
supported by centesimal prismatic lenses (SiXDEVICE) with regard to visual spatial
attention.

Methods: Twenty participants were randomly divided into experimental and control groups.
The experimental group completed a 4-week protocol supported by centesimal prismatic
lenses. The active control group completed an alternative visual training protocol.
Attention-related performance were assessed pre-/post-training via computerized tests
(Stroop, Cueing, and Flanker tasks) complemented with the collection of task-related
electrophysiological (ERPs) markers of cognitive effort.
Results: Data analysis highlighted, in the experimental group, a reduction of response times
(RTs) at the Stroop task and a paired increase of accuracy and reduction of RTs at the
Cueing task. Notably, the experimental group also showed a significant post-training
decrease of electrophysiological markers of cognitive workload (P300 ERP component)
along the midline.

Conclusion: Present findings suggest that the use of centesimal prismatic lenses might
modulate the efficiency of mechanisms supporting visual and spatial attention, hinting at
their potential as a supportive tool in neurocognitive empowerment interventions.

Keywords: Centesimal prismatic lenses; Visual training; Visual spatial attention;
Neurocognitive empowerment; Attention regulation