An adaptive optical apparatus comprising: a shielding unit configured to shield diffracted light that is generated at an aberration correction unit that is irradiated with returning light, wherein the returning light returns from an object to be examined that is irradiated with light a detection unit configured to detect an aberration of the returning light through an aperture of the shielding unit and a control unit configured to control the aberration correction unit based on a detection result of the detection unit.
