PROBLEM TO BE SOLVED: To provide an ophthalmologic apparatus capable of further stably and accurately specifying a position of a measuring object site inside a subject's eye, thereby capable of providing highly reliable data.SOLUTION: The ophthalmologic apparatus according to the present application comprises a calibration optical system including: a first optical path in which the optical path length from a zero point where the optical path length of a reference optical system becomes same as the optical path length of a measurement optical system, is a first optical path length； and a second optical path in which the optical path length from the zero point becomes a second optical path length. In the calibration optical system, the optical path length of the first optical path is set shorter than an optical path length from the zero point to a position of a first site that is closest to the zero point of the measurement object site. The optical path length of the second optical path is set longer than an optical path length from the zero point to a position of a second site that is farthest to the zero point of the measurement object site.SELECTED DRAWING: Figure 1【課題】 より一層安定して被検眼内部の測定対象部位の位置を正確に特定することが可能となり、さらには、より信頼性の高いデータを得ることが可能となる眼科装置を提供する。【解決手段】 本願の眼科装置は、参照光学系の光路長と測定光学系の光路長とが同一となるゼロ点からの光路長が第１の光路長となる第１光路部と、ゼロ点からの光路長が第２の光路長となる第２光路部とを有する較正光学系において、第１光路部の光路長は、ゼロ点から測定対象部位のゼロ点に最も近い第１部位の位置までの光路長より短く、第２光路部の光路長は、ゼロ点から測定対象部位のゼロ点に最も遠い第２部位の位置までの光路長より長くなるように設定されている。【選択図】 図１
