1. An apparatus for providing feedback to an operator of an iris recognition device, the apparatus comprising: a visible illuminator, projecting visible illumination to convey information to the operator of the iris recognition device such that the operator can position the iris recognition device to acquire an iris image without diverting the operator's gaze from a subject's face; and a controller for turning on the visible illumination if within a predetermined region around an eye region of the subject and turning off the visible illumination if deviating beyond the predetermined region, wherein the controller turns on or off the visible illumination based on detecting a location of the eye.