1. A control method based on an eye control signal comprising, (a) detecting at least one slow movement corresponding to an eye movement of at least one eye of an operator using an eye tracker; (b) generating said eye control signal using computer means from at least one detected slow movement; and (c) producing a command from the eye control signal, wherein the control method further comprises a training procedure performed with an operator by analyzing eye position data in successive same-duration time windows and by classifying data sets in each window in at least two classes comprising a first class of slow movements, for which a data set comprises sequential data points of values that are close to one another and organized in geometrical shape that is continuous, and a second class of non-slow movements.