Abstract: A head mountable device for detecting a functional disorder of a brain in a patient, includes: an opaque visor unit for positioning over eyes of the patient, a plurality of reference sensors adapted to detect a reference electrical potential for the patient during exposure to the visual stimulus, and a sensor housing including at least one electroencephalogram (EEG) electrode for measuring electrical potential generated by the brain of the patient. The visor unit includes an arrangement of a plurality of LEDs positioned on an inside surface of said visor unit to which, during use, the eyes of the patient are exposed, and an LED driver, said LED driver being configured to control each of said LEDs independently to display a visual stimulus.

Abstract: A head mountable device for detecting a functional disorder of the brain in a patient, comprising an LED display; at least one electrode for measuring electrical potential; the device being configured to be mountable on the head of a patient such that when mounted on the head of a patient the LED display is positioned before the eyes of a patient and the at least one electrode is positioned adjacent to the occipital lobe of the patient.