1. A method for recognizing fatigue of a driver of a vehicle, the method comprising: ascertaining, via an ascertaining device, a first saccade and at least one further saccade of an eye movement of a driver, using a gaze direction signal, received from an eye detection device, that models the eye movement; determining, via a determining device, a first data point representing a first amplitude of the first saccade and a first peak velocity of the first saccade, and at least one further data point representing a further amplitude of the further saccade and a further peak velocity of the further saccade, using the gaze direction signal; comparing, via a comparing device, the first data point and at least the further data point with a saccade model, wherein the driver is recognized as fatigued if the first and further data points have a predetermined relationship to a confidence region of the saccade model; and providing a fatigue signal, if the driver is recognized as fatigued, to at least one of provide a warning to the driver and prompting the driver to rest.