Patents Assigned to Technolas Perfect Vision GmbH
  • Patent number: 10076445
    Abstract: A system and method are provided for removing a natural lens and inserting an Intraocular Lens (IOL) into the lens capsule of an eye. Specifically, this is accomplished by inserting the IOL through an opening on the posterior capsule that is created using a focused laser beam. The system includes a laser unit, a detector for creating images of the interior of the eye, and a computer that controls the cooperative functions of the detector and the laser unit. Based on images of the posterior capsule provided by the detector, the computer is used to control movements of the focal point through tissue of the posterior capsule to perform Laser Induced Optical Breakdown (LIOB) on posterior capsule tissue. The result is a laser capsulotomy that creates an opening through the posterior capsule allowing the natural lens to be removed and the IOL to be implanted.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: September 18, 2018
    Assignees: BAUSCH & LOMB INCORPORATED, TECHNOLAS PERFECT VISION GMBH
    Inventors: David Haydn Mordaunt, Frieder Loesel, Gwillem Mosedale
  • Patent number: 9974692
    Abstract: A system and method for performing a femto-fragmentation procedure on tissue in the crystalline lens of an eye requires that a laser beam be directed and focused to a focal point in the crystalline lens of the eye. The focal point is then guided, relative to an axis defined by the eye, to create a segment cluster by causing Laser Induced Optical Breakdown (LIOB) of tissue in the crystalline lens. The resultant segment cluster includes a plurality of contiguous, elongated segments in the crystalline lens that are individually tapered from an anterior end-area to a posterior end-area. Specifically, this is done to facilitate the removal of individual segments from the segment cluster in the crystalline lens.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: May 22, 2018
    Assignees: BAUSCH & LOMB INCORPORATED, TECHNOLAS PERFECT VISION GMBH
    Inventors: Toh Seng Goh, Brian D. McCary, David Haydn Mordaunt, Frieder Loesel, Jochen Kandulla, Gerhard Youssefi, Werner Banghard
  • Patent number: 9636256
    Abstract: The invention relates to a method and apparatus for calculating a laser shot file for use in an excimer laser comprising the steps of providing information with respect to a desired ablation profile, calculating the shot density of the desired ablation profile, using a cost function for placing laser shots of the excimer laser on grid positions wherein a threshold value is determined based on the calculated shot density of the desired ablation profile.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: May 2, 2017
    Assignee: TECHNOLAS PERFECT VISION GMBH
    Inventor: Ernst Hegels
  • Patent number: 9629750
    Abstract: A comprehensive multi-mode system for performing ophthalmic laser surgery on selected tissue inside an eye includes a laser unit for generating and focusing a laser beam to perform Laser Induced Optical Breakdown (LIOB) at a focal point in selected tissue. Also included is a selector for defining an operational mode according to characteristics of the tissue to be altered by LIOB. In combination, the operational mode specifies value ranges for configuration parameters for a pulsed femtosecond laser beam, establishes a base reference datum in the eye, and identifies a scanning procedure for the focal point of the laser beam to customize the system for a particular surgical procedure. A computer that is connected to the laser unit is responsive to the selector for implementing the operational mode.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: April 25, 2017
    Assignee: TECHNOLAS PERFECT VISION GMBH
    Inventors: Florian Dambacher, Markus Hailmann, Frieder Loesel, Gwillem Mosedale
  • Patent number: 9603744
    Abstract: Systems and methods are described for stabilizing an eye for an ocular laser procedure while minimizing corneal distortions which can adversely affect a surgical laser beam. For the systems, a patient interface includes a contact element for stabilizing the eye and establishing a conformal interface with the anterior surface of the cornea. More specifically, devices are disclosed which overlay both a central corneal region and a peripheral corneal region. In some embodiments, a first material is used in the contact element to overlay the central corneal region and a second material is used in the contact element to overlay the peripheral corneal region. Typically, the first and second materials differ in terms of hardness and deformability. In another embodiment disclosed herein, a contact element having a viscoelastic material for stabilizing an eye for a laser procedure is described.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: March 28, 2017
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Markus Hailmann, Florian Dambacher, Frieder Loesel, Gwillem Mosedale
  • Patent number: 9592157
    Abstract: A system and method for performing a femto-fragmentation procedure on tissue in the crystalline lens of an eye requires that a laser beam be directed and focused to a focal point in the crystalline lens of the eye. The focal point is then guided, relative to an axis defined by the eye, to create a segment cluster by causing Laser Induced Optical Breakdown (LIOB) of tissue in the crystalline lens. The resultant segment cluster includes a plurality of contiguous, elongated segments in the crystalline lens that are individually tapered from an anterior end-area to a posterior end-area. Specifically, this is done to facilitate the removal of individual segments from the segment cluster in the crystalline lens.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: March 14, 2017
    Assignees: BAUSCH & LOMB INCORPORATED, TECHNOLAS PERFECT VISION GMBH
    Inventors: Toh Seng Goh, Brian D. McCary, David Haydn Mordaunt, Frieder Loesel, Jochen Kandulla, Gerhard Youssefi, Werner Banghard
  • Patent number: 9398979
    Abstract: An apparatus and method are provided for performing ocular laser surgery using a patient interface having a posterior contact surface that may include surface irregularities that were generated during manufacturing of the patient interface. A beam delivery system having a focusing lens, scanning subsystem and adaptive optic (e.g. deformable mirror) is provided for guiding the surgical laser beam through the patient interface and to a desired focal spot location. An optical detector generates image data representing the posterior patient interface surface which is then processed by a computer system to identify surface irregularities by comparing the image data to a reference surface or axis. In particular, a surface irregularity can be identified as having a z-axis component; a tilt component and a surface profile component. Each irregularity component can be compensated separately by sending an adjustment signal to one of the beam delivery system components.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: July 26, 2016
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Kristian Hohla, Frieder Loesel, Gwillem Mosedale, Gerhard Youssefi
  • Patent number: 9393155
    Abstract: In accordance with the present invention, a system and method are provided for controlling postoperative shrinkage of the capsular bag, after the lens has been removed from the capsular bag. The purpose is to establish a proper optical alignment for a prosthetic Intraocular Lens (IOL). Included in the system are a laser unit for generating a laser beam, a detector for creating an image of the prosthetic IOL in the capsular bag, and a computer for evaluating the image to determine an alignment difference between the IOL axis and a defined axis of the eye. The computer is also used for guiding the laser beam to alter selected tissue in the eye, to thereby influence postoperative shrinkage of the capsular bag and minimize any potential alignment difference between the IOL axis and the defined axis of the eye during capsular bag shrinkage.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: July 19, 2016
    Assignee: TECHNOLAS PERFECT VISION GMBH
    Inventor: Gerhard Youssefi
  • Patent number: 9216066
    Abstract: A system and method for creating a line recognition template that replicates an object is provided for use as a control reference during ophthalmic surgery on the object. Creation of the template first requires aligning a plurality of reference points along a central “z” axis, with anatomically measured lengths (?“z”n) between adjacent reference points. Axially-symmetric surfaces can then be traced between selected, adjacent, reference points to create the template. For the present invention, the location of reference points, and the tracing of axially-symmetric surfaces, are based on a cross sectional image of the object for surgery. Preferably, the cross sectional image is obtained using Optical Coherence Tomography (OCT) techniques.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: December 22, 2015
    Assignees: BAUSCH & LOMB INCORPORATED, TECHNOLAS PERFECT VISION GMBH
    Inventors: David Haydn Mordaunt, Holger Schlueter, Frieder Loesel
  • Publication number: 20140276670
    Abstract: A system and method are provided for establishing precise locations for a focal point of a laser beam within a predetermined scanning range during ophthalmic laser surgery. An important aspect of the present invention is the use of a tolerance for deviation of the laser beam's focal point from the laser beam path. The purpose of the tolerance is to ensure that the surgical procedure is effective and that collateral damage to non-targeted tissue does not occur. The present invention accounts for deviations caused by various factors during a procedure. A computer is provided to ensure that the cumulative effect of all deviations maintains the focal point within the tolerance.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Technolas Perfect Vision GmbH
    Inventors: Holger Schlueter, Roland Toennies, Gwillem Mosedale
  • Publication number: 20140257256
    Abstract: An apparatus and method are provided for performing ocular laser surgery using a patient interface having a posterior contact surface that may include surface irregularities that were generated during manufacturing of the patient interface. A beam delivery system having a focusing lens, scanning subsystem and adaptive optic (e.g. deformable mirror) is provided for guiding the surgical laser beam through the patient interface and to a desired focal spot location. An optical detector generates image data representing the posterior patient interface surface which is then processed by a computer system to identify surface irregularities by comparing the image data to a reference surface or axis. In particular, a surface irregularity can be identified as having a z-axis component; a tilt component and a surface profile component. Each irregularity component can be compensated separately by sending an adjustment signal to one of the beam delivery system components.
    Type: Application
    Filed: March 11, 2013
    Publication date: September 11, 2014
    Applicant: Technolas Perfect Vision GmbH
    Inventors: Kristian Hohla, Frieder Loesel, Gwillem Mosedale, Gerhard Youssefi
  • Patent number: 8807752
    Abstract: A methodology is provided for correcting the placement of a laser beam's focal point. Specifically, this correction is done to compensate for displacements of the focal point that may be caused when implant material (e.g. an Intraocular Lens (IOL)) is positioned on the optical path of the laser beam. The methodology of the present invention then determines a deviation of the laser beam's refracted target position (uncompensated) from its intended target position. A calculation of the deviation includes considerations of the laser beam's wavelength and refractive/diffractive characteristics introduced by the implant material. This deviation is then added to the refracted target position to make the refracted target position coincide with the intended target position of the focal point. The laser beam will then focus to its intended target position.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: August 19, 2014
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Frieder Loesel, Kristian Hohla, Gwillem Mosedale
  • Patent number: 8740888
    Abstract: A system and method for altering the shape of a lamina of transparent material (e.g. the cornea of an eye), as it is being subjected to a transverse pressure differential, requires a computer controlled laser unit. In accordance with specified input parameters, the computer directs the laser unit to perform LIOB over predetermined surfaces within the lamina. This weakens the material for a desired reshaping of the lamina in response to the pressure differential. With respect to a perpendicular axis that is defined by the lamina, surfaces parallel to the axis (e.g. cylindrical surfaces) are separated from each other by about two hundred microns. For surfaces perpendicular to the axis, the separation is about ten microns. In each instance, the cuts that result from LIOB are only about two microns thick.
    Type: Grant
    Filed: January 18, 2008
    Date of Patent: June 3, 2014
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Frieder Loesel, Josef F. Bille, Luis Antonio Ruiz
  • Patent number: 8528566
    Abstract: A method for ocular surgery requires use of a delivery system for generating and guiding a surgical laser beam to a focal point in a treatment area of an eye. Additionally, a contact device is employed for using the eye to establish a reference datum. Further, an optical detector is coupled to the beam path of the surgical laser to create a sequence of cross-sectional images. Each image visualizes both the reference datum and the focal point. Operationally, a computer then uses these images to position and move the focal point in the treatment area relative to the reference datum for surgery.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: September 10, 2013
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Frieder Loesel, Mathias Glasmacher, Ulrich von Pape
  • Patent number: 8529557
    Abstract: A system and method to compensate for the deformation of an eye requires calculation of an induced deformation angle ?, wherein the deformation is intentionally induced during laser surgery by a contact lens, and a refraction angle ?. Specifically, during laser surgery, the cornea of an eye is typically stabilized by a contact lens. This deforms the cornea. When the contact lens is removed after the surgery, the cornea recovers from the deformation. For the present invention, the angle ? is calculated, and corrected by the angle ?, so that surfaces altered during surgery (e.g. by LIOB) will become substantially parallel to incoming light in the eye, after the contact lens has been removed after surgery.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: September 10, 2013
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Josef F. Bille, Frieder Loesel
  • Patent number: 8496651
    Abstract: A system and method are provided for an ophthalmic surgical procedure to provide a refractive correction for an eye. Specifically, the procedure is indicated when the desired refractive correction “dreqd” exceeds the capability of a correction achievable when corneal tissue is only ablated. In accordance with the present invention, an optimized refractive correction “d1” is accomplished by the ablation of corneal tissue (e.g. by a PRK or LASIK procedure). The optimized correction is then followed by a complementary refractive correction “d2” wherein stromal tissue is weakened with Laser Induced Optical Breakdown (LIOB). Together, the optimized refractive correction (ablation) and the complementary refractive correction (LIOB) equal the desire refractive correction (dreqd=d1+d2).
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: July 30, 2013
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Luis Antonio Ruiz, Frieder Loesel, Josef F. Bille
  • Patent number: 8444633
    Abstract: A system and method for altering the configuration of a transparent material (e.g. the cornea of an eye) requires identifying local stress distribution patterns inside the material. These patterns are then used to define boundary (interface) surfaces between volumes within the material. In operation, a laser unit performs Laser Induced Optical Breakdown (LIOB) along selected boundary surfaces to disrupt stress distribution patterns between volumes of the material that are separated from each other by the boundary surface. This LIOB allows an externally applied force to thereby alter the configuration of the material.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: May 21, 2013
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Frieder Loesel, Josef F. Bille
  • Patent number: 8409179
    Abstract: A system for performing intrastromal ophthalmic laser surgery requires Laser Induced Optical Breakdown (LIOB) of stromal tissue without compromising Bowman's capsule (membrane). In detail, the system is computer-controlled to create symmetrical cuts in the stroma relative to a defined axis of the eye. Importantly, these cuts are all distanced from the axis. The actual location and number of cuts in the surgery will depend on the degree of visual aberration being corrected. Further, the system may create different types of cuts in the stroma. For example, the symmetrical cuts (by type) may include cylindrical, radial or annular layer cuts. The different type cuts may be intersecting or non-intersecting depending on the visual aberration being treated.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: April 2, 2013
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Josef F. Bille, Luis Antonio Ruiz
  • Patent number: 8388610
    Abstract: The invention relates to an apparatus and a method for determining the applicability of a treatment pattern for manipulation of a cornea of an eye using a laser. The concept of the present invention is based on the determination of an actual volumetric profile based on a set of input data and a theoretical volumetric profile which is created independently based on only the basic optical parameters. On the basis of a comparison of the determined volumetric profiles it is determined whether the actual volumetric profile is within predetermined tolerances.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: March 5, 2013
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Gerhard Youssefi, Anton Hilger
  • Patent number: 8385618
    Abstract: The invention relates to an apparatus and a method for determining the energy of a laser. In particular, the invention relates to an initial determination of a laser energy and the monitoring of the laser energy preferably of an excimer laser for use in a refractive laser system for treatment of any eye. An apparatus for determining an energy of an excimer laser comprises a tool comprising an area being ablated with a plurality of laser pulses of said excimer laser using at least one predetermined multi spot ablation pattern, said ablation area comprising a specific ablation area being as large as the ablation area or smaller, an image capturing means for capturing at least one image comprising at least said specific ablation area of the tool; an analyzing means for analyzing said at least one image, wherein the size of the specific ablation area provides a measure of the energy of the excimer laser.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: February 26, 2013
    Assignee: Technolas Perfect Vision GmbH
    Inventors: Gerhard Youssefi, Birgit Lutzenberger, Julia Hoff, Ernst Hegels