PROBLEM TO BE SOLVED: To provide a mechanism capable of robustly focusing on each photographing object of eyes to be examined with high accuracy.SOLUTION: The mechanism includes a confocal point data acquisition unit 111 for acquiring a confocal point signal of a photographing object in eyes to be examined, a non-confocal point data acquisition unit 112 for acquiring a non-confocal point signal of the photographing object in the eyes to be examined, and a focal point specification unit 132 for specifying a focal position of the eyes of examined on the basis of at least the non-confocal point signal between the confocal point signal and the non-focal point signal.SELECTED DRAWING: Figure 2【課題】被検眼の各撮影対象においてロバスト且つ高精度に合焦を行える仕組みを提供する。【解決手段】被検眼における撮影対象の共焦点信号を取得する共焦点データ取得部１１１と、被検眼における撮影対象の非共焦点信号を取得する非共焦点データ取得部１１２と、共焦点信号及び非共焦点信号のうちの少なくとも非共焦点信号に基づいて被検眼の合焦位置を特定する合焦位置特定部１３２を備える。【選択図】図２
