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

Claim 12:
13. 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;
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; and
c) guiding the at least one light beam by at least one optical element to the at least one eye of the user and to a wavefront sensing unit, wherein the at least one optical element includes:
a beam splitter configured to split the at least one light beam into at least two partial light beams, wherein at least one of the partial light beams is guided to the at least one eye of the user; and
an optical relay system configured to relay an entrance pupil plane onto a pupil plane of the at least one eye of the user, wherein the at least one diffractive element is placed in the entrance pupil plane, and
wherein, the beam splitter is placed in a manner that the same optical relay system is configured to relay the entrance pupil plane to a surface plane of the wavefront sensing unit.