Patent ID: 9295386
Filing Date: 2016-03-29
CPC Classification: A61B

Claim Text:
1. An ophthalmologic apparatus comprising: an examination part configured to include an optical system for optically examining an eye, the optical system being an optical coherence tomography (OCT) system; a moving mechanism configured to move the optical system; an information obtaining part configured to obtain information for carrying out position matching of the optical system to the eye; a controller configured to carry out first control for the moving mechanism based on the information obtained by the information obtaining part to move the optical system, determine whether information optically obtained by the optical system after the first control is appropriate to the examination or not, and when it is determined that this information is not appropriate, carry out second control for the moving mechanism in response to a prescribed trigger to move the optical system, wherein the optical system is configured to irradiate light from a light source onto an eye fundus, detect returned light of this light from the eye fundus; split light from the light source into signal light and reference light; scan the eye fundus with the signal light; detect interference light obtained by composing returned light of the signal light from the eye fundus and the reference light; and include an optical-path-length changing part configured for relatively changing optical path length of the signal light and optical path length of the reference light, the examination part is configured to include a cross sectional image forming part configured to form a cross sectional image of the eye fundus based on the detection result of the interference light by the optical system, and the controller is configured to perform the determination based on the detection result of the returned light; carry out the determination based on the detection result of the interference light or the cross sectional image; and, in the determination, while controlling the optical system in such a way as to repeatedly scan the same portion of the eye fundus, control the optical-path-length changing part such that the eye fundus is depicted in a prescribed area in a frame based on detection results of the interference light or cross sectional images repeatedly obtained by this control, and determine that the information optically obtained by the optical system is not appropriate when the eye fundus is not depicted in the prescribed area.