<p>This head-mounted display has a light source and allows a user to recognize an image superimposed on an observed scene. This head-mounted display has: a control means that radiates, from a light source, light for allowing a user to recognize so as to be able to compare, and for rendering a first image and a second image that indicates the distance in the depth direction in the scene; and a detection means that detects the posture and behavior of the user. The control means switches between displaying and not displaying the second image depending on the posture or behavior detected by the detection means.</p>
