The invention relates to a method for monitoring a passenger of a vehicle in which the geographic position of the vehicle is recorded, and a viewing direction of the passenger is recorded by means of a eye-tracking device. A data memory is accessed in which objects and geographic positions assigned to them are saved and, by using the recorded geographic position of the vehicle, it is detected whether one of the objects is located in the environment of the vehicle, and whether the object in the environment of the vehicle was perceived by the passenger depending on the recorded viewing direction of the passenger, the recorded geographic position of the vehicle, and the geographic position of the detected object in the environment of the vehicle.