Creation of curved cuts in the inside of the eye cornea

    公开(公告)号:US12127980B2

    公开(公告)日:2024-10-29

    申请号:US18175367

    申请日:2023-02-27

    IPC分类号: A61F9/008

    摘要: A device for isolating a lenticle in the cornea of an eye. The device includes: a laser beam source to emit pulsed laser radiation having a pulse frequency of 1.2 MHz to 10 MHz, a pulse energy of 1 nJ to 200 nJ and a wavelength penetrating the cornea; a beam-forming unit having beam optics with an image field and that bundles pulsed laser radiation into a focus located inside the image field, and which has a maximum diameter of less than 3 μm; a beam-deflection unit shifting the focus in the cornea and inside the image field, the focus moving along a path when the image field is resting; and a control unit to control the source and the beam-forming unit to isolate the lenticle by specifying the path. The lenticle is delimited by a cut surface which is curved with regard to a front surface of the cornea.

    BEAM SPLITTING DEVICE, OPHTHALMOLOGICAL LASER THERAPY SYSTEM, METHOD FOR SCANNING A PATIENT'S EYE, AND METHOD FOR SPLITTING

    公开(公告)号:US20240325199A1

    公开(公告)日:2024-10-03

    申请号:US18282768

    申请日:2022-02-17

    摘要: The invention relates to a beam splitting device (10) for generating a plurality of laser output beams (90-93) from one laser input beam (60), wherein: the beam splitting device (10) has a first beam multiplier element (20) for generating two intermediate beams (75, 76) from the laser input beam (60); the first beam multiplier element (20) has a first polarising beam splitter (22, 42), a second polarising beam splitter (24, 44) and at least one first deflection element (26, 46) for deflecting an intermediate beam (76) by a specified angle: the beam splitting device (10) is designed in such a way that, when the laser input beam (60) is irradiated onto the first polarising beam splitter (22, 42) of the first beam multiplier element (20), the laser input beam (60) is split into the first intermediate beam (75) and the second intermediate beam (76) by means of the first polarising beam splitter (22, 42) of the first beam multiplier element (20); the two intermediate beams (75, 76) span the x-y plane, the second intermediate beam (76) is deflected by the first deflection element (26) by a specified angle, in particular approximately 90° or approximately 180°, the first intermediate beam (75) and the second intermediate beam (76) are irradiated onto the second polarising beam splitter (24) of the first beam multiplier element (20) in such a way that the first intermediate beam (75) and the second intermediate beam (76) radiate away from the second polarising beam splitter (24) of the first beam multiplier element (20) at a substantially parallel mutual offset or with a specified angular difference, in particular of less than 3 mrad, preferably less than 1.4 mrad, particularly preferably less than 0.6 mrad.

    Compensating for distortion of images of an eye for a surgical procedure

    公开(公告)号:US12097149B2

    公开(公告)日:2024-09-24

    申请号:US17643456

    申请日:2021-12-09

    申请人: Alcon Inc.

    IPC分类号: A61F9/008 A61B3/00 A61B3/11

    摘要: In certain embodiments, an ophthalmic surgical system for adjusting a dimension of an eye includes a camera and a computer. The camera generates a surgical image of the eye in contact with a patient interface, which distorts the cornea. The surgical image includes the pupil with a real pupil diameter. The computer accesses a diagnostic image of the eye with the cornea having a natural curvature. The natural curvature affects the real pupil diameter to yield a diagnostic pupil diameter of the diagnostic image that is different from the real pupil diameter of the surgical image. The computer adjusts the real pupil diameter of the surgical image using an eye model to yield a refracted pupil diameter that takes into account the curvature of the cornea and uses the refracted pupil diameter to compensate for the difference between the diagnostic and real pupil diameters.