PROBLEM TO BE SOLVED: To enable a user to grasp whether there is narrowing or occlusion in an aqueous fluid outflow path area including at least one of Schlemm's canal and a collecting pipe on a tomographic image of an anterior eye part.SOLUTION: The image processing device includes: acquisition means for acquiring a tomographic image including the aqueous fluid outflow path area including at least one of Schlemm's canal and a collecting pipe of an anterior eye part of a suspected eye; and generation means for generating an image where the aqueous fluid outflow path area is enhanced or extracted based on a luminance value of the tomographic image.SELECTED DRAWING: Figure 4【課題】 ユーザが前眼部の断層画像におけるシュレム管と集合管との少なくとも一方を含む房水流出路領域の狭窄や閉塞等の有無を把握可能にすること。【解決手段】 画像処理装置は、被検眼の前眼部のシュレム管と集合管との少なくとも一方を含む房水流出路領域を含む断層画像を取得する取得手段と、断層画像の輝度値に基づいて、房水流出路領域が強調または抽出された画像を生成する生成手段と、を有する。【選択図】 図4