To ensure display of a region of interest on a fundus image and a tomographic image of an eye to be inspected in a correspondence manner, an apparatus for processing images of an eye to be inspected includes: a unit that acquires a fundus image of an eye to be inspected； a unit that designates an arbitrary point on the fundus image； a unit that acquires a tomographic image of the eye to be inspected； a unit that calculates a point on the tomographic image corresponding to the arbitrary point； and a unit that converts a coordinate system for displaying the tomographic image and the fundus image in association with each other on the basis of positions of the arbitrary point and the corresponding point.
