PROBLEM TO BE SOLVED: To provide a displacement measuring apparatus capable of measuring displacement of a sight line of a subject.SOLUTION: A displacement measuring apparatus 1 executes: processing of acquiring a captured image from an imaging device which is relatively fixed to a prescribed target and images at least an area around an eye of the subject, and detecting the three-dimensional position of the pupil center of left and right eyes of the subject processing of detecting the three-dimensional position of the corneal cap of the left and right eyes of the subject processing of calculating a first angle formed by the pupil center of the left and right eyes to the target processing of calculating a second angle formed by the corneal cap of the left and right eyes to the target and processing of calculating a first displacement angle which is a difference between the first angle and the second angle.COPYRIGHT: (C)2014,JPO&INPIT【課題】 被検者の視線の変位を測定可能な、変位測定装置を提供できる。【解決手段】 変位測定装置1は、所定の視標に対して相対的に固定され、被検者の少なくとも眼周辺の領域を撮像する撮像装置から撮像画像を取得して、被検者の左右眼の瞳孔中心の三次元位置を検出する処理と、被検者の左右眼の角膜頂点の三次元位置を検出する処理と、前記左右眼の瞳孔中心が前記視標に対してなす、第一の角度を算出する処理と、前記左右眼の角膜頂点が前記視標に対してなす、第二の角度を算出する処理と、前記第一の角度と前記第二の角度の差である第1の変位角を算出する処理と、を実行する。【選択図】 図1
