Fundus oculi observation device and ophthalmic image display device

1. A fundus oculi observation device comprising:

a first image forming part configured to form a 2-dimensional image of a surface of a fundus oculi of an eye;

a second image forming part configured to form a tomographic image having a cross-sectional position in a measurement region of the fundus oculi corresponding to a partial region of the 2-dimensional image;

a display;

a storage configured to store imaging condition information including characteristic information showing a characteristic of the eye; and

a controller configured to match display sizes of the formed 2-dimensional image and a measurement range image showing a range of the measurement region with each other by changing the display size of at least the formed 2-dimensional image to match the display size of the measurement range image, based on the stored imaging condition information, and cause the display to display the 2-dimensional image and the measurement range image whose display sizes are matched.

2. The fundus oculi observation device according to claim 1 , wherein:

the characteristic information includes an axial length of the eye.

3. The fundus oculi observation device according to claim 2 , wherein:

the second image forming part includes:

a light source configured to output a low coherence light;

an interference light generator configured to generate an interference light by splitting the outputted low coherence light into a signal light and a reference light and superimposing a fundus oculi reflection light of the signal light applied to the fundus oculi via a signal light path and the reference light reflected by a reference object via a reference light path; and

a detector configured to receive the generated interference light and output a detection signal;

the fundus oculi observation device further comprises an alignment part configured to perform alignment of an optical system forming the signal light path with the eye;

the controller includes an intraocular distance calculator configured to calculate an intraocular distance between a position where the signal light has entered into the eye and a position where the signal light has been reflected by the fundus oculi, based on a light path length of the signal light path, a light path length of the reference light path, a distance between the eye and the optical system when the alignment has been performed, and a detection signal outputted by the detector; and

the storage stores the calculated intraocular distance as the axial length.

4. The fundus oculi observation device according to claim 3 , wherein:

the controller causes the display to display a tomographic image formed by the second image forming part together with the 2-dimensional image and the measurement range image whose display sizes have been matched.

5. The fundus oculi observation device according to claim 2 , wherein:

the controller causes the display to display a tomographic image formed by the second image forming part together with the 2-dimensional image and the measurement range image whose display sizes have been matched.

6. The fundus oculi observation device according to claim 1 , wherein:

the controller causes the display to display a tomographic image formed by the second image forming part together with the 2-dimensional image and the measurement range image whose display sizes have been matched.

7. The fundus oculi observation device according to claim 1 , wherein:

the display sizes of the formed 2-dimensional image and the measurement range image are matched by changing the display sizes of both the formed 2-dimensional image and the measurement range image.