Ophthalmologic apparatus

An ophthalmologic apparatus comprising:

• a data acquisition device that acquires data by scanning an anterior eye segment of a subject's eye using optical coherence tomography;
• a distribution information generator that generates distribution information representing a distribution of a predetermined parameter in the anterior eye segment by analyzing the data;
• a front image acquisition device that acquires a front image of the anterior eye segment at a time of the data being acquired;
• a storage that stores first distribution information generated from first data acquired at a first time, a first front image at a time of the first data is being acquired, second distribution information generated from second data acquired at a second time, and a second front image at a time of the second data is being acquired;
• a positional difference calculator that calculates a positional difference between the first front image and the second front image;
• and
• a registration processor that applies registration to the first distribution information and the second distribution information based on the positional difference.