The invention relates to a method and a device for making correction information for correcting a guidance direction of an instrument. Based on a current position of the tip of the instrument and the current guidance direction of the instrument and the position of a target point in an object, a first straight line indicating the current guidance direction and a second straight line defined by the tip of the instrument and the target point in the object are determined. The second straight line intersects the first straight line and indicates the desired guidance direction. Based on the position of the first and second straight lines relative to one another, a digital item of correction information is specified, wherein the correction image has a correction diagram located in a plane in the perspective of the current guidance direction of the instrument.
