INTRAOCULAR LENS
    1.
    发明公开
    INTRAOCULAR LENS 审中-公开

    公开(公告)号:US20240335276A1

    公开(公告)日:2024-10-10

    申请号:US18293261

    申请日:2022-01-04

    Abstract: An intraocular lens has a lens body. At least one side surface of the lens body is provided with a focus determination diffraction area and a focus offset diffraction area. The focus determination diffraction area comprises at least two focus determination diffraction structures of different heights. The focus determination diffraction structures of different heights are alternately arranged to provide the intraocular lens with focuses which respectively correspond to distant vision, intermediate vision and near vision. The focus offset diffraction area comprises focus offset diffraction structures which corresponds to the focus determination diffraction structures. The height ratio of the at least one focus offset diffraction structure to a corresponding focus determination diffraction structure is 1.1 to 1.3 or 0.8 to 0.95. The focus offset diffraction structures provide the intraocular lens with offset focuses.

    MULTIFOCAL LENS HAVING REDUCED VISUAL DISTURBANCES

    公开(公告)号:US20240024094A1

    公开(公告)日:2024-01-25

    申请号:US18479314

    申请日:2023-10-02

    Applicant: Alcon Inc.

    Abstract: A method and system provide an ophthalmic device. The ophthalmic device includes an ophthalmic lens having an anterior surface, a posterior surface, at least one diffractive structure and at least one base curvature. The at least one diffractive structure for provides a first spherical aberration for a first focus corresponding to at least a first focal length. The at least one base curvature provides a second spherical aberration for at least a second focus corresponding to at least a second focal length. The first spherical aberration and the second spherical aberration are provided such that the first focus has a first focus spherical aberration and the second focus has a second focus spherical aberration. The first focus spherical aberration is opposite in sign to the second focus spherical aberration.

    MULTIFOCAL DIFFRACTION LENS
    9.
    发明公开

    公开(公告)号:US20230301775A1

    公开(公告)日:2023-09-28

    申请号:US18023704

    申请日:2021-10-07

    CPC classification number: A61F2/1618 A61F2/1654 G02B27/4205

    Abstract: A multifocal diffractive lens is provided which achieves efficient use of light. The multifocal diffractive lens 100 includes a diffraction grating 1c. Negative-order light L2 produces a focal point f2 for far vision and 0-order light L1 produces a focal point f1 nearer to that for far vision. The number of focal points is two or more. The focal position fc for far vision in polychromatic performance evaluation is located nearer to the multifocal diffractive lens than the focal position fs for far vision in monochromatic performance evaluation.

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