PROBLEM TO BE SOLVED: To make it possible to easily observe wide-angle OCT data.SOLUTION: An OCT apparatus includes an OCT optical system and control means. The OCT optical system splits, with a light splitter, light from an OCT light source into light traveling through a measurement light path and light traveling through a reference light path, and detects, with a detector, a spectral interference signal between measurement light guided onto an eyeground of a subject eye via the measurement light path and reference light from the reference light path. The control means is capable of outputting OCT data acquired based on the spectral interference signal to display means, and switches a display state of the display means between a first imaging mode for capturing OCT data in an eyeground center area and a second imaging mode for capturing OCT data in a wide-angle region including the eyeground center area and an eyeground peripheral area.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2019,JPO&INPIT【課題】 広角のＯＣＴデータを容易に観察できる。【解決手段】 ＯＣＴ光源からの光を測定光路と参照光路とに光分割器によって分割し、前記測定光路を介して被検眼の眼底上に導かれた測定光と前記参照光路からの参照光とのスペクトル干渉信号を検出器によって検出するＯＣＴ光学系と、前記スペクトル干渉信号に基づいて取得されるＯＣＴデータを表示手段に出力可能な制御手段であって、眼底中心部でのＯＣＴデータを得るための第１の撮影モードと、眼底中心部と眼底周辺部を含む広角領域でのＯＣＴデータを得るための第２の撮影モードとの間で表示手段の表示状態を切り換える制御手段と、を備える。【選択図】 図４
