A visual neuromodulation system includes a processor and a transition function determination module configured to determine a spatial frequency transition function corresponding to a spatial frequency based on user input. The user input includes: (i) a quantity of illusions perceived in response to viewing a spatial frequency pattern associated with the spatial frequency and (ii) a level of discomfort sensed in response to viewing the spatial frequency pattern associated with the spatial frequency. The system also includes a threshold determination module configured to determine a threshold spatial frequency based on the spatial frequency transition function. The system includes, in response to the threshold determination module determining the threshold spatial frequency, a control module that selects a display spatial frequency pattern from a set of spatial frequency patterns. The selected spatial frequency pattern corresponds to a display spatial frequency greater than the threshold spatial frequency to display for a predetermined period.
Visual neuromodulation system and methods for treatments of visually triggered migraine headaches and seizures