38 results about "Eye surgery laser" patented technology

In an ophthalmic surgical laser system, a patient interface device for coupling a patient's eye to the laser system includes a lens cone with a frustoconical shaped shell for coupling to the laser system and a suction ring for coupling to the patient's eye, the lens cone and the suction ring being joined together by clamping. A cap is provided for use with the lens cone as an installation aid. In the configuration supplied to the user, the lens cone is partially embedded in and snapped to the cap. The cap has a portion with a relatively large diameter and multiple ribs for easy handling. The user holds the cap to install the lens cone on the laser system, and pulls the cap to unsnap it from the lens cone. The lens cone is attached to the laser system with a bayonet mount that provides tactile feedback to the user.

A method implemented in an ophthalmic surgical laser system that employs a resonant scanner, scan line rotator, and XY- and Z-scanners, for forming a corneal flap in a patient's eye with improved bubble management during each step of the flap creation process. A pocket cut is formed first below bed level, followed by the bed connected to the pocket cut, then by a side cut extending from the bed to the anterior corneal surface. The pocket cut includes a pocket region located below the bed level and a ramp region connecting the pocket region to the bed. The bed is formed by a hinge cut and a first ring cut at lower laser energies, followed by a bed cut and then a second ring cut, which ensures that any location in the flap bed is cut twice to minimize tissue adhesion. The side cut is formed by multiple side-cut layers at different depths which are joined together. All cuts are formed by scanning a laser scan line generated by the resonant scanner.

The invention relates to a method for controlling an ophthalmic surgical laser (18) to separate a volume (12), the method comprising: - determining a target position of a pupil relative to a laser beam (24) and determining an optical zone (44) having a treatment center (52) at an interface (14, 16) relative to an optical axis (30) of the laser beam (24); - determining a transition zone (48) at the volume (12) as an extension of the interface (14, 16); - obtaining a current actual position of the pupil; - determining a deviation between the target position and the actual position; and - decentering the determined optical zone (44) relative to the optical axis (30) according to the determined deviation, so that an edge (46) of the volume (12) is produced concentrically relative to the optical axis (30) and the optical zone (44) is produced concentrically with the determined treatment center (52) and within the transition zone (48). The invention also relates to a treatment device (10), a computer program and a computer-readable medium.

A method implemented in an ophthalmic surgical laser system for forming a corneal flap in a patient's eye with improved bubble management. The flap includes a horizontal bed and a vertical or near vertical side cut around the periphery of the bed except for an uncut hinge area. The side cut has a bubble barrier layer that can prevent bubbles formed by the laser-tissue interaction from escaping into an interface between the corneal and the patient interface lens. In some embodiments, the bubble barrier layer is a thin uncut layer, located in the epithelium of the cornea, that separates the side cut into two portions. In other embodiments, the side cut does not reach the anterior corneal surface, leaving an uncut bubble barrier layer located with the epithelium. In other embodiments, an additional side cut portion is formed through the uncut bubble barrier layer as the last step.

A method implemented in an ophthalmic surgical laser system for forming a corneal flap in a patient's eye with improved bubble management. The flap includes a horizontal bed and a vertical or near vertical side cut around the periphery of the bed except for an uncut hinge area. The side cut has a bubble barrier layer that can prevent bubbles formed by the laser-tissue interaction from escaping into an interface between the corneal and the patient interface lens. In some embodiments, the bubble barrier layer is a thin uncut layer, located in the epithelium of the cornea, that separates the side cut into two portions. In other embodiments, the side cut does not reach the anterior corneal surface, leaving an uncut bubble barrier layer located with the epithelium. In other embodiments, an additional side cut portion is formed through the uncut bubble barrier layer as the last step.

The invention relates to a method for providing control data for an ophthalmic surgical laser (12) of a treatment device (10) for treating a human or animal eye (16), wherein the method is used to optimize the conflict between the objectives of low stress on the patient and the highest possible laser efficacy, the method comprising the following steps performed by a control device (18): determining (S1) a patient-specific parameter set, the patient-specific parameter set being associated with at least one physiological property of the eye (16), determining (S4) at least one physical parameter of the ophthalmic surgical laser (12) based on the patient-specific parameter set, wherein the physical parameter relates to a physical property of a laser beam (19) of the laser (12), and providing (S5) control data for controlling the ophthalmic surgical laser (12), the control data comprising the physical parameter.

In an ophthalmic surgical laser system, a patient interface device for coupling a patient's eye to the laser system includes a lens cone with a frustoconical shaped shell for coupling to the laser system and a suction ring for coupling to the patient's eye, the lens cone and the suction ring being joined together by clamping. A cap is provided for use with the lens cone as an installation aid. In the configuration supplied to the user, the lens cone is partially embedded in and snapped to the cap. The cap has a portion with a relatively large diameter and multiple ribs for easy handling. The user holds the cap to install the lens cone on the laser system, and pulls the cap to unsnap it from the lens cone. The lens cone is attached to the laser system with a bayonet mount that provides tactile feedback to the user.

A method is disclosed for controlling an eye surgical laser of a treatment apparatus for the separation of a volume body with a predefined posterior interface and a predefined anterior interface from a human or animal cornea. The method includes controlling the laser with a control device of the treatment apparatus such that it emits pulsed laser pulses in a shot sequence in a predefined pattern into the cornea. The interfaces of the volume body to be separated are defined by the predefined pattern and the interfaces are generated by means of an interaction of the individual laser pulses with the cornea by the generation of a plurality of cavitation bubbles. An arc length of the anterior interface and an arc length of the posterior interface are generated of equal length in all radial directions by at least one indentation in one of the interfaces.

Computer program for controlling an ophthalmic surgical laser (18) for separating a volume body (12) with a predefined posterior interface (14) and a predefined anterior interface (16) from a human or animal cornea (32), comprising commands that cause a treatment device to control the laser (18) by means of a control unit (20) such that it emits pulsed laser pulses into the cornea (32) in a predefined pattern, wherein the interfaces (14, 16) of the volume body (12) to be separated are defined by the predefined pattern and the interfaces (14, 16) are generated by means of an interaction of the individual laser pulses with the cornea by means of cavitation bubbles, wherein the predefined pattern for generating the interfaces (14, 16) provides several interface change positions (34, 36) on one of the two predefined interfaces (14, 16).wherein at the specified interface change positions (34, 36) the laser pulses are focused parallel along an optical axis (OA) of the cornea (32) onto the other predefined interface and the laser pulses are then continued on the other interface, and wherein both interfaces (14, 16) are generated by means of a continuous, uninterrupted sequence of laser pulses.

The present invention relates to a patient interface device in an ophthalmic surgical laser system for coupling an eye of a patient to the laser system, the patient interface device comprising a lens barrel having a frustoconical housing for coupling to the laser system and a suction ring for coupling to the eye of the patient, the lens barrel and the suction ring are joined together by clamping. A cap is provided for use with the lens barrel as a mounting aid. In a configuration provided to a user, the lens barrel is partially embedded in and engaged with the cap. The cap has a relatively large diameter portion and a plurality of ribs that are easy to handle. The user holds the cap to mount the lens barrel on the laser system, and pulls the cap to unbuckle the cap from the lens barrel. The lens barrel is attached to the laser system using a bayonet fixture that provides haptic feedback to the user.

A method is disclosed for providing control data for an eye surgical laser of a treatment apparatus for the removal of tissue from a human or animal cornea. The method includes ascertaining a temperature distribution expected in the cornea per laser pulse, and determining, by using a temperature model of the cornea, a laser pulse sequence of a preset laser pulse distribution for removing the tissue. A respective laser pulse position in the cornea is preset by the laser pulse distribution and sequence. A temperature profile of the cornea is calculated by means of cumulated temperature distributions of the laser pulses in the temperature model and a difference profile to a preset limit temperature profile is determined. An order of the laser pulses is ascertained depending on the difference profile for determining the laser pulse sequence, and providing control data for controlling the laser pulse sequence for removing tissue.

A method for providing control data of an eye surgical laser of a treatment apparatus is disclosed for a treatment on a human or animal eye. The method optimizes a target conflict between low stress for a patient and efficacy of a laser. The method includes, as performed by a control device, determining a patient-specific parameter set, which relates to at least one physiological characteristic of the eye, determining at least one physical parameter for the eye surgical laser depending on the patient-specific parameter set, wherein the physical parameter relates to a physical characteristic of a laser beam of the laser, and providing control data for controlling the eye surgical laser, which includes the physical parameter.

A method for controlling a surgical laser for the separation of a volume body, with predefined posterior and anterior interfaces, from a human or animal cornea is disclosed. The method including controlling the laser by means of a control device such that it emits pulsed laser pulses in a shot sequence into the cornea. The interfaces are generated by the generation of a plurality of cavitation bubbles generated by photodisruption by means of an interaction of the individual laser pulses with the cornea. A minimum diameter of the volume body orthogonal to an optical axis of the volume body is determined depending on at least one diopter value for the volume body and on a preset thickness of the volume body viewed in a direction of the optical axis. A treatment apparatus, a computer program product and a computer-readable storage medium are also disclosed.

Apparatus and method for interfacing an ophthalmic surgical laser system with a patient's eye using a single-piece patient interface (PI). The PI includes a hollow shell, with an applanation lens and a flexible skirt at its lower end. Through channels are formed around the applanation lens to connect the spaces above and below the lens. When the PI is coupled to the laser system and the eye, the upper rim of the shell forms a seal with the laser system and the flexible skirt forms a seal with the eye. A vacuum is applied to the interior of the shell via a vacuum port on the laser system, and the vacuum is communicated to the space enclosed by the applanation lens, the skirt and the eye through the channels around the lens. A magnetic mechanism is also provided to hold the PI shell to the laser system.

Method for providing control data for an ophthalmic surgical laser (18) of a treatment device (10), wherein the method comprises the following steps performed by a control device (20): - Determining at least one cross-sectional area (14, 16) in a cornea (26) of a human or animal eye (30), - Defining an incision path (17, 17') which extends from an outer surface of the cornea (26) to at least one of the cut surfaces (14, 16), wherein the incision path (17, 17') has at least two sections (17a, 17b, 17c) with different slope values ​​between the outer surface and the respective cut surface (14, 16), and wherein the incision path (17, 17') terminates at an obtuse angle in the respective cut surface (14, 16), - Providing control data for controlling the ophthalmic surgical laser (18) which includes at least the defined incision path (17, 17'), wherein a path profile with a minimum area is calculated in a cross-section along the optical axis of the eye to define the incision path (17, 17').

A method for providing control data of an eye surgical laser is disclosed. A control device ascertains a lenticule geometry of the lenticule to be separated from predetermined visual disorder data of a human or animal eye. The lenticule geometry is defined by means of a refractive power value to be corrected and a lenticule diameter. The control device ascertains a correction value for compensating for a deformation of the lenticule, which is generated by at least one contact element of the treatment apparatus. The control device ascertains a deformation geometry of the lenticule, wherein the deformation geometry is defined by means of the refractive power value and a deformation diameter. The deformation diameter is calculated depending on the lenticule diameter and the correction value, and provides control data for controlling the eye surgical laser, which uses the deformation geometry for the separation of the lenticule.

Method for providing control data for an ophthalmic surgical laser (12) of a treatment device (10) for the removal of tissue (14), the method comprising the following steps performed by a control device (18): a) Determining (S10) a preoperative corneal shape (26) of a cornea (16) of a human or animal eye from predetermined examination data; b) Determining (S12) a corneal shape (30) to be achieved from the predetermined examination data; c) Specifying (S14) exactly one or exactly two predetermined ablation depths to be achieved in a z-direction at at least one predetermined position (24) in an xy-direction between the preoperative corneal shape (26) and the corneal shape (30) to be achieved; d) Determining (S16) ablation data for the removal of the tissue (14).wherein, to determine the ablation data, the preoperative corneal shape (26) is related to the corneal shape to be achieved (30) such that the predetermined ablation depth results at the predetermined position (24) between the two corneal shapes, wherein corneal tissue (16) located between the related corneal shapes is defined in the ablation data as tissue (14) to be removed, wherein the corneal shapes (26, 30) are superimposed and subsequently the corneal shape to be achieved (30) is moved along the z-direction to the preoperative corneal shape until the predetermined ablation depth is reached at at least one predetermined position (24) between the preoperative corneal shape (26) and the corneal shape to be achieved, wherein by subtracting the corneal shape to be achieved (30), which is aligned with the predetermined ablation depth,a difference is formed from the preoperative corneal shape (26), whereby areas with a positive difference are defined as tissue to be removed (14) and areas with a negative difference as tissue not to be treated; and e) providing (S18) control data for controlling the ophthalmic surgical laser (12), which uses the ablation data to remove the tissue (14).

Method for providing control data for an ophthalmic surgical laser (18), wherein the method comprises the following steps performed by a control device (20): - Determining refractive error data for at least one eye-specific parameter describing a refractive error and / or a geometry causing the refractive error of a human or animal eye (36) (S1), - based on the determined refractive error data: Determining a lenticule geometry that describes the dimensions of a lenticule (12) and its position (S2), - Defining a posterior interface (14) of the lenticel (12) and an anterior interface (16) of the lenticel (12) as intersection surfaces to form the lenticel (12, S3), - Defining at least two differently positioned incision paths (46, 48), each extending from a predetermined incision site on an outer surface of the cornea (17) to one of the defined interfaces (14, 16) (S4); wherein the predetermined incision sites are at a predetermined angle to each other about a predetermined reference point, and wherein only one of the incision paths (46, 48) extends only to the defined anterior interface (16) within a lenticule rim (40) where the defined anterior (16) and the defined posterior interface (14) meet; wherein the further incision path (48) lies outside the lenticule rim (40) and within the larger of the two interfaces (14, 16), and - Providing control data for controlling the ophthalmic surgical laser (18) which describe the at least two specified incision paths (46, 48) and the specified interfaces (14, 16) (S7).

The invention relates to a treatment device (10) and a method for providing control data for an ophthalmic ablation laser (12) of a treatment device (10). The method comprises determining (S10) a planned path (26) of an opening incision (24) in a cornea (16), which is defined as the line connecting an existing incision (14) within the cornea (16) to an outer surface of the cornea (16), wherein the opening incision (24) was inadequately created in a previously performed treatment; and generating (S12) an ablation planning pattern by which a planned positioning of laser pulses along the determined path (26) of the opening incision (24) from the surface of the cornea (16) to the existing incision (14) within the cornea (16) is provided. and the provision (S14) of the control data for the ophthalmic ablation laser (12), which includes the ablation planning pattern.

Embodiments of this invention generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for lenticular laser incision. In an embodiment, an ophthalmic surgical laser system comprises a laser delivery system for delivering a pulsed laser beam to a target in a subject's eye, an XY-scan device to deflect the pulsed laser beam, a Z-scan device to modify a depth of a focus of the pulsed laser beam, and a controller configured to form a top lenticular incision and a bottom lenticular incision of a lens in the subject's eye, or just a bottom lenticular incision.

In certain embodiments, an ophthalmic surgical laser system for generating images of and treating eye floaters includes an SLO subsystem, a treatment laser subsystem, a scanner, optics, and a computer. The SLO subsystem provides an SLO laser beam with an SLO focus, and the treatment laser subsystem provides a treatment laser beam with a treatment focus that is spatially coincident with the SLO focus. The scanner scans the SLO laser beam within a scan region and directs the treatment laser beam to an xy location of the scan region. The optics aim the SLO laser beam and the treatment laser beam to substantially the same point on the scan region. The computer receives the SLO image of the floaters, identifies the xy location of the floaters, and commands the treatment laser system to direct the treatment laser beam to the xy and z scan location of the floaters.

Method for providing control data for an ophthalmic surgical laser (18) of a treatment device (10), wherein the treatment device (10) is designed to treat a human or animal eye to correct a refractive error, the method comprising the following steps performed by a control device (20): - Determining at least one laser setting (P, P1) of the laser (18) for treating the eye, wherein the laser setting (P1) is assigned to a calibration time point (t1) under at least one calibration environmental condition, and the respective laser setting (P, P1) is chosen such that a predetermined optimal value for refractive error treatment is achieved when treating the eye under the at least one calibration environmental condition, wherein the calibration period (t1) is a period in which a calibration of the laser (18) is carried out. - Determine at least one treatment environmental condition that is present at a treatment time (t2) different from the calibration time (t1), where the treatment time (t2) is a time at which the treatment of the refractive error of the eye is to be carried out, - only if at least one treatment environment condition deviates from at least one calibration environment condition according to a predefined deviation criterion: Correcting at least one laser setting (P, P1) according to a previously known correction function (K), wherein the corrected laser setting (P, P2) is chosen such that the optimal value for refractive error treatment is achieved when the eye is treated under at least one treatment environment condition, and - Providing control data for controlling the ophthalmic surgical laser (18), which includes at least one corrected laser setting (P, P2), characterized in that - the treatment environmental condition and / or the calibration environmental condition specify an air pressure and / or a temperature, and the respective treatment environmental condition is estimated depending on a previously known environmental data set, and / or - a cornea (26) and / or lens of the eye is provided for treatment and the correction function (K) is selected depending on one of several different tissue types of the cornea (26) which is to be treated by means of the treatment device (10).

A patient interface device for an ophthalmic surgical laser system includes a lens cone component for coupling to the laser system and a suction ring component having a flexible skirt for coupling to the patient's eye. The suction ring component includes a gripper integrated with the flexible skirt, formed of hard plastic material and having two jaws that face each other to define a receiving opening between them. During use, a base portion of the lens cone is inserted into the receiving opening of the gripper and retained by the clamping force of the jaws. To ensure that the gripper securely retains the lens cone, a soft thermoplastic elastomer material is provided on the outer surface of the base portion of the lens cone, and the inner surfaces of the jaws of the gripper are provided with teeth to engage the soft thermoplastic elastomer material of the lens cone.

Method for providing control data for an ophthalmic surgical laser (18) of a treatment device (10), wherein the method comprises the following steps performed by means of a control device (20): - Determining a first and at least a second cross-sectional surface (14, 16) in a cornea (26) of a human or animal eye, - Establishing an incision path which, starting from an outer surface of the cornea (26), divides and extends on the one hand to the first cutting surface (14) and on the other hand to at least the second cutting surface (16), - wherein the incision path has a first path (17a) extending from the outside into a volume of the cornea (26), and which splits at a node (17d) into a second path (17b) and at least a third path (17c), wherein the second path (17b) extends from the node (17d) to the first cut surface (14) and the at least third path (17c) extends from the node (17d) to the at least second cut surface (16), - Providing control data for controlling the ophthalmic surgical laser (18), which includes at least the defined incision path, characterized in that - the second and third routes (17c) enclose an angle between 70 and 120 degrees at the node.

Embodiments of this invention generally relate to ophthalmic laser procedures and, more particularly, to systems and methods for lenticular laser incision. In an embodiment, an ophthalmic surgical laser system comprises a laser delivery system for delivering a pulsed laser beam to a target in a subject's eye, an XY-scan device to deflect the pulsed laser beam, a Z-scan device to modify a depth of a focus of the pulsed laser beam, and a controller configured to form a top lenticular incision and a bottom lenticular incision of a lens in the subject's eye.

The invention relates to a method for providing secondary control data for an ophthalmic laser (12) of a treatment device (10), wherein the method comprises the following steps performed by a control unit (18): determining the respective position of at least one primary cut surface (24) in the cornea (28) resulting from a previous treatment of the cornea (28), based on the secondary anatomy of the cornea (28) to be treated as described in the secondary anatomy data; determining one secondary tissue lenticule to be separated from the cornea (28) based on the secondary anatomy of the cornea (28) and the surgical procedure, wherein the at least one secondary tissue lenticule is defined by the at least one primary cut surface (24) and at least one secondary cut surface (26) to be generated;Providing secondary control data for controlling the ophthalmic surgical laser (12) to generate at least one secondary cutting surface (26) in the cornea (28).;

Method for providing control data for an ophthalmic surgical laser (12) of a treatment device (10) for the removal of tissue (14), wherein the method comprises the following steps performed by a control device (18): - Determining (S10) a corneal geometry of a cornea of ​​a human or animal eye (16) from predetermined examination data; - Determining (S12) a tissue geometry of the tissue to be removed (14) from the predetermined examination data; - Determining (S14) a target corneal geometry expected by removing the tissue (14) from the cornea; - Determining (S16) a transition region geometry of a transition region (28) depending on the target corneal geometry, wherein the transition region (28) provides a transition between the tissue (14) to be removed and the cornea; - Providing (S18) control data for controlling the ophthalmic surgical laser (12) using the tissue geometry and transition area geometry for tissue removal (14).

Method for providing control data for an ophthalmic surgical laser, wherein the method comprises the following steps performed by a control device (20): - Determining refractive error data describing a degree of refractive error of a human or animal eye (40) (S1), - Determining an actual geometry of a correction area (32) of a cornea (17) of the eye (40), which describes three-dimensional dimensions of the correction area (32) of the cornea (17) (S2), - based on the determined refractive error data and the determined actual geometry: Determining a target geometry of the correction area (32) that describes a reduction component (44) of the correction area (32) with a corneal thickness reduced compared to the actual geometry, and / or a thickening component (42) with a corneal thickness increased compared to the actual geometry; wherein the determined target geometry fulfills a predefined refractive error reduction criterion that specifies suitability for reducing the degree of refractive error (S3), - Specifying the angle of rotation and the axis of rotation (31) depending on: a) a result of a comparison of the determined actual geometry with the determined target geometry, and / or b) the determined visual impairment data (S5), - based on the determined actual geometry: Determining interfaces (14, 16) of a lenticel (12) within the correction area (32), which extends at least partially over the correction area (32), wherein a portion of the lenticel (12) is designed such that, when the lenticel (12) is rotated (D) into the thickening portion (42) about the specified axis of rotation (31) passing through the cornea (17) and about the specified angle of rotation, it transforms the correction area (32) from the determined actual geometry into the determined target geometry (S4), - Defining at least one incision path as access for an instrument to rotate the lenticule (12), which extends from a predetermined incision site on an outer surface of the cornea (17) to one of the defined interfaces (14, 16) (S7), and - Providing control data that describe the determined interfaces (14, 16) for forming the lenticel (12), the at least one determined incision path, the specified axis of rotation (31) and a rotation of the lenticel (12) about the specified angle of rotation (S6).

Laser eye surgery is in recent years more and more augmented and supported by the application of various photodisruptive laser pulse applications to the eye tissue. The here described inventions relates to several methods and system for improved laser eye surgery using photodisruptive laser pulses.