A device for measuring mild perceptual impairment of a human subject, comprises a generator of stimuli, a producer of responses to the stimuli, and a processor of the responses. Each stimuli has at least one parameter and includes a first-order dynamic stimulus and a second-order dynamic stimulus. The generator applies temporal frequency variations to at least one of the first-order and second-order dynamic stimuli. Responses to the stimuli are indicative of a perception of the at least one parameter of each stimuli by the human subject and of a sensitivity of the human subject to the temporal frequency variations applied to at least one of first-order and second-order dynamic stimuli. The processor determines a perceptual signature which is a characteristic pattern of performance determined by measuring luminance sensitivity of the human subject to static and the first order dynamic stimuli and measuring contrast sensitivity of the human subject to static and the second order dynamic stimuli in view of determining if the human subject suffers from mild perceptual impairment. Determining perceptual signature is based on the temporal frequency variations applied to at least one of the first-order and second-order dynamic stimuli.
DEVICE AND METHOD FOR MEASURING MILD PERCEPTUAL IMPAIRMENT