LINE OF SIGHT DETECTION DEVICE, DISPLAY METHOD, LINE OF SIGHT DETECTION DEVICE CALIBRATION METHOD, SPECTACLE LENS DESIGN METHOD, SPECTACLE LENS SELECTION METHOD, SPECTACLE LENS MANUFACTURING METHOD, PRINTED MATTER, SPECTACLE LENS SALES METHOD, OPTICAL DEVICE, LINE OF SIGHT INFORMATION DETECTION METHOD, OPTICAL INSTRUMENT DESIGN METHOD, OPTICAL INSTRUMENT, OPTICAL INSTRUMENT SELECTION METHOD, AND OPTICAL INSTRUMENT PRODUCTION METHOD

摘要

A line of sight detection device includes: a measurement unit that measures a movement of eyeball of a subject wearing eyeglasses; a gaze point detection unit that detects a gaze point of the subject in a forward field of view of the subject based on a result of measurement by the measurement unit; a transmission point detection unit that detects a transmission point at which a line of sight of the subject toward the gaze point passes through a lens of the eyeglasses based on the result of the measurement by the measurement unit; and a display control unit that causes gaze point information indicating a position of the gaze point to be displayed at a display in superimposition on an image of the forward field of view and causes transmission point information indicating a position of the transmission point to be displayed at the display in superimposition on a lens image showing the lens of the eyeglasses.