Ophthalmic apparatus, method of controlling ophthalmic apparatus, and recording medium

A method of controlling an ophthalmic apparatus including an interference optical system including an optical scanner and configured to split light from light source into measurement light and reference light, to irradiate a subject's eye with the measurement light deflected by the optical scanner, and to detect interference light between returning light of the measurement light from the subject's eye and the reference light, the method comprising:

• a first control step of controlling the optical scanner so as to deflect the measurement light in a horizontal direction and a vertical direction on a plane perpendicular to an optical axis of the interference optical system;
• and
• a second control step of controlling an astigmatism correction optical member so as to correct astigmatism based on a detection result of the interference light obtained in the interference optical system by irradiating the measurement light deflected in the first control step onto the subject's eye, wherein
• the first control step is performed to control the optical scanner so as to circularly deflect the measurement light by deflecting the measurement light in the horizontal direction and the vertical direction, and
• when a diffraction limit is r, a diameter of a circle-shaped scan line on the subject's eye is R, and the number of A-lines in the scan line is N, (R×π/N)<r is satisfied.

A non-transitory computer readable recording medium storing a program of causing a computer to execute each step of a method of controlling an ophthalmic apparatus including an interference optical system including an optical scanner and configured to split light from light source into measurement light and reference light, to irradiate a subject's eye with the measurement light deflected by the optical scanner, and to detect interference light between returning light of the measurement light from the subject's eye and the reference light, the method comprising:

• a first control step of controlling the optical scanner so as to deflect the measurement light in a horizontal direction and a vertical direction on a plane perpendicular to an optical axis of the interference optical system;
• and
• a second control step of controlling an astigmatism correction optical member so as to correct astigmatism based on a detection result of the interference light obtained in the interference optical system by irradiating the measurement light deflected in the first control step onto the subject's eye, wherein
• the first control step is performed to control the optical scanner so as to circularly deflect the measurement light by deflecting the measurement light in the horizontal direction and the vertical direction, and
• when a diffraction limit is r, a diameter of a circle-shaped scan line on the subject's eve is R, and the number of A-lines in the scan line is N, (R×π/N)<r is satisfied.