A wide range within a subject eye is observed while a burden on a subject of whom the subject eye is part is moderated. In an optical system (28A) that deals with light reflected from the fundus of the subject eye (12), a first optical system (28A1) that pertains to a field of view of a fundus central portion centered on an optical axis is used as a standard optical system. The optical system (28A) can be switched by a replacement mechanism (28B) from the first optical system (28A1) to a second optical system (28A2) that pertains to a field of view of a fundus surroundings portion surrounding the fundus central portion.