Try to stare at this image for some 10 or 20 seconds.
The uncomfortable sensation you feel is called Visual Discomfort. For some people, it may induce moving vision, sickness or migraines, which is usually diagnosed as Meares-Irlen syndrome. Recent studies suggest that its physiological reason can be an unusual operation of inhibitory neurons in the visual cortex. I am using our neurodynamical model to study the neuronal information foundations of this unusual psychological behaviour.