Visual Telerehabilitation in Children, Adolescents and Young Adults With Hemianopsia Consecutive to a Brain Tumour

The MOT IVR audiovisual stimulation task involves the 3D multiple-object-tracking paradigm composed of 6-8 high-contrast spheres which features are adapted to the visual ability of individuals with low-vision (luminosity = 80 nits, size = 1° to 3° visual angle). The spheres move for 20s. following random linear paths, bouncing on one another and on the walls of a virtual 3D cube when collisions occur. The participant, comfortably seated, is asked to track the moving cued target among moving distractors for 20s. A spatial sound is correlated to the movement of the cued target. After 20s., the movement stops and the participant is asked to select, using a laser pointer, the cued sphere among the distractors (mark-all procedure). Speed of the spheres is regulated by a staircase 1:1 procedure. The stimulation can here be stopped by the participant if required. After 3 blocks of 15x20s., the system stops and goes on stand-by mode until the next session. Data are collected in real time.