To provide an image analysis apparatus and an image analysis method capable of making high-accuracy elliptic approximation to a ring-shaped image and also to provide an ophthalmologic apparatus including the image analysis apparatus.SOLUTION: The image analysis apparatus comprises: an image acquisition unit for acquiring a ring-shaped image which is based on return light of a ring-shaped measurement pattern projected onto a subject eye； an edge detection unit for detecting an edge of the ring-shaped image acquired by the image acquisition unit； a position detection unit for detecting positions of the ring-shaped image at a plurality of positions along a circumferential direction of the ring-shaped image on the basis of a detection result of the edge detection unit, and obtains a plurality of detection points； an abnormal point detection unit for detecting an abnormal point from among the plurality of detection points detected by the position detection unit on the basis of a positional relationship of the plurality of detection points； an abnormal point removal unit for removing the abnormal point from among the plurality of detection points on the basis of a detection result of the abnormal point detection unit； and an elliptic approximation unit for setting an approximate ellipse to a plurality of detection points after the abnormal point was removed by the abnormal point removal unit.SELECTED DRAWING: Figure 3【課題】リング像に対して高精度な楕円近似が可能な画像解析装置及び画像解析方法と、この画像解析装置を備える眼科装置とを提供する。【解決手段】被検眼に投影されたリング状の測定用パターンの戻り光に基づくリング像を取得する画像取得部と、画像取得部により取得されたリング像のエッジを検出するエッジ検出部と、エッジ検出部の検出結果に基づき、リング像の周方向に沿った複数の位置でリング像の位置を検出して、複数の検出点を得る位置検出部と、位置検出部により検出された複数の検出点の位置関係に基づいて、複数の検出点の中から異常点を検出する異常点検出部と、異常点検出部の検出結果に基づき、複数の検出点の中から異常点を除去する異常点除去部と、異常点除去部による異常点の除去後の複数の検出点に対して近似楕円を設定する楕円近似部と、を備える。【選択図】図３
