Patent ID: 11883098
Assignee: CARL ZEISS VISION INTERNATIONAL GMBH
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 24:
25. A method for determining an ocular aberration of at least one eye of a user, the method comprising the following steps:
a) measuring at least one optical wavefront comprised by at least one light beam, wherein an ocular aberration of the at least one eye of the user is determined from the at least one optical wavefront; and
b) generating multiple diffraction orders in the at least one light beam in two meridians in a manner that the multiple diffraction orders are spatially separated on a wavefront sensing unit and in the at least one eye of the user,
wherein, the method further comprises providing an additional optical path, and wherein at least one of a fixation target and a pupil camera is placed in the additional optical path, and wherein
a single diffractive element providing a two-dimensional grating is generating the multiple diffraction orders in the two meridians; or
at least two individual diffractive elements are generating the multiple diffraction orders in one meridian, wherein the at least two individual meridians are arranged orthogonally with respect to each other; or
at least one single diffractive element providing a one-dimensional grating is generating the multiple diffraction orders in one meridian, and is being rotated in a manner that the multiple diffraction orders are provided in the two meridians.