Apparatus for the assessment of electrophysiological signals obtained from a patient, the apparatus comprising: a housing; a support arch pivotally mounted to the housing, the support arch comprising a plurality of facial contact point supports for supporting contact points on the face of the patient relative to the support arch without supporting the chin of the patient; at least one display screen for presenting a stimulus to a single eye of the patient, the at least one display screen being movable relative to the support arch; and control electronics disposed within the housing for driving the at least one display screen and for amplifying electrophysiological signals obtained from the patient.