Patent ID: 7540614

Claim:
An ophthalmologic apparatus, comprising: an imaging system that illuminates a retina of an eye, and images the retina of the eye based on reflective luminous flux from the retina; an aberration measurement part that measures optical aberration of the eye; an aberration compensation device disposed in the imaging system to compensate the optical aberration of the eye based on a signal from the aberration measurement part; a first focusing device disposed in an optical path of the imaging system to perform focusing of an image of the retina of the eye according to a refractive property of the eye; and a second focusing device disposed in the optical path of the imaging system to compensate an infinitesimal spherical aberration generated by the aberration compensation device after adjustment by the first focusing device, and wherein the first focusing device is a device that compensates a spherical diopter component and an astigmatism diopter component of a wavefront aberration generated because of a flexing property of the eye and, the second focusing device is a high-magnification high-speed focus mechanism that compensates a wavefront aberration component, that is, an infinitesimal spherical diopter newly generated by deforming the deformable mirror and controls infinitesimal quantity movement of at least a portion of a lens of a lens system that constitutes the imaging system along an optical axis direction by a piezo device.