PROBLEM TO BE SOLVED: To provide displays that are useful in designing or selecting spectacle lenses.SOLUTION: A line of sight detection device 1 comprises: a measurement unit that measures a motion of eye balls of a subject wearing a spectacle 2； a point of attention detection unit that detects a point of attention in a forward field of view of the subject on the basis of a measurement result by the measurement unit； a transmission point detection unit that detects a transmission point where a line of sight of the subject relative to the point of attention transmits in a lens of the spectacle on the basis of the measurement result by the measurement unit； and a display control unit that causes a display unit to display point-of-attention information indicative of a position of the point of attention with the point-of-attention information superimposed on an image of the forward field of view, and causes the display unit to display transmission point information indicative of a position of the transmission point with the transmission point information superimposed on a lens image indicative of the lens of the spectacle.SELECTED DRAWING: Figure 1【課題】眼鏡レンズの設計や選択の際に有用な表示を提供する。【解決手段】視線検出装置１は、眼鏡２を装着した被検者の眼球の動きを測定する測定部と、前記測定部による測定結果に基づいて、前記被検者の前方視野における注視点を検出する注視点検出部と、前記測定部による測定結果に基づいて、前記眼鏡のレンズにおいて前記被検者の前記注視点への視線が透過する透過点を検出する透過点検出部と、前記注視点の位置を示す注視点情報を、前記前方視野の画像に重ねて表示部に表示させると共に、前記透過点の位置を示す透過点情報を、前記眼鏡のレンズを示すレンズ画像に重ねて表示部に表示させる表示制御部とを備える。【選択図】図１
