An ophthalmologic apparatus includes an aberration measurement unit configured to measure aberration caused by a subjects eye by using a return beam of a first measuring beam from the subjects eye, a correction unit configured to correct aberration of a return beam of a second measuring beam from the subjects eye caused by the subjects eye based on the aberration measured by the aberration measurement unit, a first acquisition unit configured to obtain a first image of the subjects eye by using the aberration-corrected return beam of the second measuring beam from the subjects eye, and a control unit configured to enter one of the first measuring beam and the second measuring beam into the subjects eye while limiting entry of the other measuring beams into the subjects eye.
