Zoï Kapoula is welcomed to the Lycée St Sulpice. The tests that she performs always show that there is a clear relationship between motor function, sight and dyslexia. A special helmet was developed for that. It has two rapid video cameras that capture 200 images per second. The computerised mechanism renders all the movements of each eye in real time. It checks whether the eyes are really moving together and if they stabilise after the movement. These dyscoordinations and instabilities momentarily induce blurred vision and might partly explain reading slowness among dyslexic children.