Device (100; 300) comprising: - a control unit , and - a stimulation unit having a plurality of stimulation elements which generate visual stimulation signals - wherein N of the stimulation elements generate the visual stimulation signals at different spatial locations, wherein N ≥ 2 holds, and - wherein the N stimulation elements generate the visual stimulation signals at predetermined locations in the field of view of the patient, - wherein the simulation elements are configured in such a way that they generate visual stimulation signals which, when recorded via an eye of a patient and transmitted to neurons having a morbidly synchronous and oscillatory neuronal activity, reset the phase of the neuronal activity of the neurons, - the N stimulation elements are arranged in the field of view of the patient in such a way that the visual simulation signals generated by the N stimulation elements stimulate different subpopulations of a neuron population having a morbidly synchronous and oscillatory neuronal activity, - the control unit controls the stimulation unit in such a way that the N stimulation elements generate the visual stimulation signals with a time shift between each other so that the phases of the neuronal activity of the subpopulations are reset at different points in time, - the N stimulation elements are configured in such a way that the time shift between each of two consecutive visual stimulation signals generated by different ones of the N stimulation elements is 1 / (f stim x N) and f stim is a frequency in the range of 1 to 30 Hz, and characterized in that - the control unit is configured in such a way that the duration of the visual stimulation signals generated by the N stimulation elements is adjustable. - a control unit , and - a stimulation unit having a plurality of stimulation elements which generate visual stimulation signals - wherein N of the stimulation elements generate the visual stimulation signals at different spatial locations, wherein N ≥ 2 holds, and - wherein the N stimulation elements generate the visual stimulation signals at predetermined locations in the field of view of the patient, - wherein the simulation elements are configured in such a way that they generate visual stimulation signals which, when recorded via an eye of a patient and transmitted to neurons having a morbidly synchronous and oscillatory neuronal activity, reset the phase of the neuronal activity of the neurons, - the N stimulation elements are arranged in the field of view of the patient in such a way that the visual simulation signals generated by the N stimulation elements stimulate different subpopulations of a neuron population having a morbidly synchronous and oscillatory neuronal activity, - the control unit controls the stimulation unit in such a way that the N stimulation elements generate the visual stimulation signals with a time shift between each other so that the phases of the neuronal activity of the subpopulations are reset at different points in time, - the N stimulation elements are configured in such a way that the time shift between each of two consecutive visual stimulation signals generated by different ones of the N stimulation elements is 1 / (f stim x N) and f stim is a frequency in the range of 1 to 30 Hz, and - the control unit is configured in such a way that the duration of the visual stimulation signals generated by the N stimulation elements is adjustable. <EOS>