Fundus observation apparatus

A fundus observation apparatus comprising:

• an optical system that splits low coherence light into signal light and reference light, generates interference light by superposing said signal light that has passed through the fundus of an eye and reference light that has passed through a reference optical path, and detects the generated interference light;
• a scanning part that two-dimensionally scans said fundus with said signal light;
• an image forming part that forms, based on the detection results of said interference light, a 3-dimensional image corresponding to the region of said fundus in which the two-dimensional scanning with said signal light is executed;
• an imaging part that forms a moving image of said fundus when the two-dimensional scanning with said signal light is executed;
• and
• a correction part that corrects the position of said 3-dimensional image in a fundus surface direction based on the formed moving image, and corrects the position of said 3-dimensional image in a fundus depth direction, based on a tomographic image of said fundus that is formed by said image forming part based on the detection results of interference light of separately scanned signal light by said scanning part and reference light, wherein
• said scanning part scans with said signal light along each of a plurality of scanning lines that are parallel to each other, as said two-dimensional scanning;
• said image forming part forms a tomographic image corresponding to each of said plurality scanning lines and forms said 3-dimensional image based on the formed plurality of tomographic images;
• said imaging part forms said moving image by forming still images when the scanning with said signal light is executed along each of said plurality of scanning lines;
• and
• said correction part specifies an image region of a characteristic site of said fundus in each of said plurality of still images, calculates the positional misalignment amount of said image region in said plurality of still images, and corrects the position of said 3-dimensional image in the fundus surface direction by correcting the relative position of said plurality of tomographic images based on the calculated positional misalignment amount.