1. A diagnosis assisting apparatus comprising: a display; an imaging unit configured to image a subject; a line of sight detecting unit configured to detect a line of sight direction of the subject from a picked-up image imaged by the imaging unit; a point of view detecting unit configured to detect a point of view of the subject in a display region of the display based on the line of sight direction; and an output controller configured to display a diagnostic image including a natural image and a geometrical image, wherein the point of view detecting unit detects the point of view of the subject in a case where the diagnostic image is displayed.