An ophthalmologic apparatus according to an exemplary embodiment acquires data by OCT scanning of the anterior eye segment. The apparatus generates distribution information of a predetermined parameter in the anterior eye segment by analyzing the data. The apparatus acquires a front image of the anterior eye segment at the time of the data being acquired. The apparatus stores the first distribution information and the first front image both corresponding to the first time, and the second distribution information and the second front image both corresponding to the second time. The apparatus calculates the positional difference between the first front image and the second front image. The apparatus applies registration to the first distribution information and the second distribution information based on the positional difference.