To enhance visibility of an image provided by a wearable optical device depending on different situations. Provided is an electronic apparatus including an illuminance information acquisition unit (510) configured to acquire illuminance information indicating illuminance of light incident on a wearable optical device toward a viewer from a real space, a situation information acquisition unit (540) configured to acquire situation information indicating a situation surrounding the wearable optical device, a luminance determination unit (520) configured to determine luminance of light emitted by the wearable optical device to allow the viewer to perceive an image superimposed on the real space, the determination of luminance being performed on a basis of the illuminance information and the situation information, and a controller (530) configured to control the wearable optical device to cause the wearable optical device to emit light having the determined luminance.