This system gives direct access to the desired command. The user, shown a certain graphic interface, selects the desired command by positioning a given cursor over it and then effecting a given validation action (usually by time, although sometimes blink can be used). The drawback of this interface is the Midas Touch problem: the human eye is always ON and therefore, it is always looking somewhere. Everywhere the user looks, another command is activated. This guidance strategy can hence be of use only in supervised applications, since the system does not guarantee the safety of the user when a loss of control happens.