Treatment device, method for controlling a treatment device, computer program and computer-readable medium

Abstract

The invention relates to a treatment device (10) for treating a refractive error of a human or animal eye (16), wherein the treatment device (10) comprises a laser device, an interface device (30), a movement device (40), and a control device (18). The laser device is configured to irradiate tissue of an eye (16) to be treated with a laser beam (20) from at least one ophthalmic laser (12). The interface device (30) serves for eye contact. The movement device (40) has at least one controllable actuating element and is configured to move the interface device (30) in at least one spatial direction by means of the controllable actuating element.The control device (18) is configured to generate position control data for controlling the motion device (40), wherein the control device (18) is configured to cause the motion device (40) to move the interface device (30) in the form of micro-movements during treatment with the laser (12) by means of the position control data.

Description

[0001] The invention relates to a treatment device, a method for controlling a treatment device, a computer program and a computer-readable medium.

[0002] Treatment devices with a laser device for treating refractive errors in a human or animal eye are known in the prior art. Non-linear interactions between laser radiation and eye tissue can typically be exploited, usually in the form of an optical breakthrough created at the focus of high-energy laser radiation. However, since the processing effect can only occur at the laser beam focus, a large number of processing points are defined, at which the laser beam is successively focused. These processing points are addressed sequentially, for example, to define a cutting surface. Since the processing points are only small in size, a large number of processing points is necessary to create a smooth cutting surface. A large number of points increases the required processing time.If, on the one hand, the number of processing points is reduced, a corneal volume on one side of the cutting surface and a corneal volume on the other side of the cutting surface opposite the one side are connected to one another via tissue bridges, which must be subsequently broken up, for example by manual processing with a knife or spatula, which can deteriorate the optical quality of the cutting surface, for example due to roughness. On the other hand, however, if a focus of the laser radiation is widened in order to achieve larger processing points, the power of the laser radiation decreases and it can happen that the power density required for optical breakthrough is no longer achieved, which in turn can deteriorate the optical quality of the cutting surface.

[0003] The invention is based on the object of improving a treatment of a visual defect of a human or animal eye, reducing a processing time of such a treatment and at the same time improving an optical quality of a cut surface.

[0004] This object is achieved by the treatment device according to the invention, the method according to the invention, the computer program according to the invention, and the computer-readable medium according to the invention. Advantageous embodiments with expedient refinements of the invention are specified in the respective subclaims, wherein advantageous embodiments of the method are to be regarded as advantageous embodiments of the treatment device, the control device, the computer program, and the computer-readable medium, and vice versa.

[0005] The invention is based on the idea of ​​using a scanning device with a controllable actuator, in particular a piezo actuator, to move the interface device in the form of micromovements during treatment with the treatment device. These micromovements allow the treatment point to be expanded or widened without reducing the power density of the laser radiation. This can reduce the proportion of tissue bridges on a cut surface.

[0006] According to a first embodiment, the invention provides a treatment device for treating a visual impairment of a human or animal eye, wherein the treatment device comprises a laser device, an interface device, a movement device, and a control device. The laser device is configured to irradiate tissue of an eye to be treated with a laser beam from at least one ophthalmic laser. The interface device serves to make eye contact. The movement device has at least one controllable actuating element and is designed to move the interface device in at least one spatial direction by means of the controllable actuating element.The control device is designed to generate position control data for controlling the movement device, wherein the control device is designed to cause the movement device, by means of the position control data, to move the interface device in the form of micro-movements during the treatment with the laser.

[0007] In other words, a treatment device is provided for treating a refractive error of a human or animal eye, i.e., for correcting a refractive error. The treatment device comprises the laser device and can be configured to irradiate tissue of an eye to be treated with a laser beam from at least one ophthalmic laser, which, by means of a beam deflection unit or a laser scanner or rotary scanner, can emit a laser beam emitted by the laser onto the eye to irradiate a tissue to be treated. This can serve to at least partially separate a predefined corneal volume of the eye by means of optical disruption, in particular by means of photodisruption and / or photoablation at a treatment position or processing position.The interface device can, for example, comprise a patient interface, a contact lens, a contact element or a contact fixing element for fixing the eye by means of a suction mechanism or other fixing methods, and thus represents an interface for docking or pressing onto an eye to be treated.

[0008] Furthermore, the treatment device can also be used, for example, to provide additional procedures such as laser-induced refractive index change (LIRIC) in the cornea and / or the lens of the eye, photoinduced cross-linking of corneal tissue, or similar procedures. Furthermore, the laser can be operated in different power ranges, allowing for a plasma-mediated ablation regime or a plasma-induced ablation regime in addition to a classic photodisruption regime.

[0009] The movement device is designed to position or move the interface device by means of the controllable actuating element depending on position control data. This movement can occur in at least one spatial direction, in two spatial directions, or in three spatial directions. Furthermore, the movement device can be designed to perform a rotational movement, such as a rotational movement around the optical axis of the laser beam impinging on the eye (in the rest position of the beam deflection unit), or a rotation around an axis perpendicular thereto.

[0010] The movement device can comprise a position scanner, a fine scanner or a scanning device, which can be mounted between the treatment device and the interface device. The movement device can comprise at least one controllable actuating element. This can be designed to convert an applied current and / or voltage into a position or into a movement. This means that the controllable actuating element can be located between a fixed part of the movement device, which is for example connected to the treatment device or mounted thereon, and a movable part of the movement device, and the controllable actuating element can effect a relative displacement or movement or positioning of the movable part of the movement device. This makes it possible to control a component mounted on the movable part, such asto move a contact element when a voltage is applied to the controllable actuating element by the movement of the controllable actuating element.

[0011] The controllable actuator can comprise a piezo actuator, which can, for example, comprise a piezo material such as a piezo ceramic, a piezo crystal, or a piezo thin film, and can utilize the piezoelectric effect, or piezo effect, in which an elastic deformation of the piezo material occurs by means of an applied voltage. The deformation can, for example, comprise a longitudinal expansion of the piezo actuator (longitudinal expansion), a transverse expansion of the piezo actuator (a transverse expansion), or a diagonal expansion of the piezo actuator (a shear). Furthermore, the controllable actuator can be, for example, an electric motor.

[0012] Furthermore, the positioning device can increase or decrease the extension of the controllable actuator by means of a mechanical amplification mechanism, such as a lever arm or another force conversion mechanism. This can serve to increase the range of motion of the movement device or to increase the force generated by the movement device.

[0013] The position control data is provided by the control device, or the control device is configured to generate the position control data. The position control data can, for example, comprise a scanning voltage and / or a scanning current that can be applied to the controllable actuator. Optionally, the movement device can comprise a voltage generating device or a power supply device that can generate a voltage or current applied to the controllable actuator using the position control data.

[0014] The movement device makes it possible to move the interface device to or from a target position and / or to move it in the form of micro-movements such as periodic or sinusoidal oscillations. These micro-movements can range in size from a few µm. These micro-movements allow the interface device to be moved along with a docked eye, for example, which in turn corresponds to a relative movement of the laser beam with respect to the interface device or the docked eye.

[0015] This makes it possible to vary the position where the laser beam is focused and where the treatment takes place, thus enlarging the treatment point. This can, for example, reduce the width of a tissue bridge to the next treatment point, thus facilitating the separation of the treated tissue. Furthermore, enlarging the treatment points in this way can improve the optical quality of a cut surface by reducing the risk of uncontrolled breakup of the tissue bridges.

[0016] The invention also includes embodiments which provide additional advantages.

[0017] One embodiment provides that the movement device is arranged and configured to perform the micro-movements of the movement device or the interface device relative to the laser beam. This makes it possible to easily enlarge a processing point created by the laser beam.

[0018] One embodiment provides that the control device is additionally configured to generate laser control data for controlling the laser device. This makes it possible to control the laser device and the movement device by a common control device in the treatment device.

[0019] One embodiment provides that the control device is configured to generate the laser control data and the position control data such that the micromovements of the interface device are synchronized with the emission of the laser beam from the laser device. This means that the micromovements are synchronized with an emission pattern or emission time of the laser. The laser can be operated in a pulsed mode, with repetition frequencies greater than 10 kilohertz, preferably between 100 kilohertz and 100 megahertz. By synchronizing the micromovements with the emission of the laser beam, repeatable processing of a processing point can be achieved.

[0020] One embodiment provides for the micro-movements to be periodic movements. In particular, the micro-movements can be sinusoidal movements. In this case, it is not necessary for the movements to have only one frequency; they can also be more complex movements, for example, generated by the superposition of two or more frequencies. Control in the form of periodic movements enables repeatable processing of a processing point.

[0021] One embodiment provides for the micromovements to be movements on the order of less than 500 µm, preferably less than 100 µm, and even more preferably less than 1 µm. This means that fine adjustment with the movement device can be limited to ±10 nm to ±500 µm. Preferably, the micromovements are comparable to the size of a diameter of a focal point of the laser beam. However, they can also be smaller to achieve only a slight broadening of the processing point, or they can be larger to achieve a size corresponding to an extension of two or more focal point diameters. This allows for better optical quality of a cut surface.

[0022] One embodiment provides that the movement device is configured to move the interface device in a first spatial direction at a first speed and to move the interface device in a second spatial direction at a second speed, wherein the first speed is greater than the second speed, in particular the first speed is a multiple of the second speed. This means that the movement device executes a two-dimensional movement in the sense of a 2D scanning method in order to enlarge the processing point along two spatial directions. This also allows the aforementioned advantages to be achieved. Furthermore, the optical quality of a cutting surface can be improved.

[0023] One embodiment provides that the movement device is configured to move the interface device along an incident direction of the laser beam, and the micro-movements move the interface device along this incident direction during a marginal cut in a cornea of ​​the eye. Here, a marginal cut or an incision means an opening, e.g., for removing a cut lenticule or for removing tissue or for inserting an artificial lens. A incident direction of the laser beam, i.e., a laser propagation direction of the laser beam from the treatment device into the eye with the beam deflection device in the neutral position, can be defined as a z-direction, and the micro-movements can occur along the z-direction. This can enable a better design of the marginal cut and a better optical quality of the cut surface, e.g.reduces the generation of stray light at an unevenly shaped cutting surface.

[0024] One embodiment provides that the movement device is further configured to move the interface device perpendicular to an incident direction of the laser beam. This enables movement of the interface device in a plane perpendicular to the incident direction of the laser beam.

[0025] One embodiment provides for the micromovements to be adjusted depending on the processing position of the laser beam. This means that the micromovements are adjusted, for example, in amplitude and / or direction, to move the interface device such that the processing point moves along the cutting surface. Furthermore, this can also be performed, for example, as part of a correction of higher-order aberrations. This enables particularly flexible use of the treatment device and simultaneously makes it possible to achieve better optical quality of the cutting surface.

[0026] One embodiment provides that the movement device is configured to move the interface device by means of a displacement, rotational movement, and / or a tilting movement. For example, this can be done to compensate for an offset of a docked eye, or to compensate for a thickness error of the interface device or an offset of the interface device. This allows for tolerance in the manufacturing of the interface device and thus reduces manufacturing costs. At the same time, the micro-movements make it possible to improve optical quality.

[0027] A further aspect of the invention relates to a method for controlling a treatment device according to one of the preceding embodiments, wherein the method comprises the steps of generating the position control data, generating the laser control data, transmitting the position control data to the movement device, transmitting the laser control data to the laser device, irradiating the eye, and moving the movement device. Generating the position control data comprises generating the position control data by the control device. Generating the laser control data comprises generating the laser control data by the control device. Transmitting the position control data comprises transmitting the position control data to the movement device for controlling the movement device by means of micro-movements that move the interface device in at least one spatial direction.Transmitting the laser control data comprises transmitting the laser control data to the laser device for irradiating a tissue to be treated in an eye contacted by the interface device. Irradiating the eye comprises irradiating the eye with the laser device, and moving the movement device comprises moving the movement device using micromovements during laser irradiation.

[0028] A further aspect of the invention relates to a computer program comprising instructions that cause the treatment device to execute the method according to the above aspect. The program code can include at least one control data set with the respective control data for the respective laser. When the program code is executed by a computer or computer network, the computer is prompted to execute the previously described method or at least one embodiment thereof.

[0029] A further aspect of the invention relates to a computer-readable medium (storage medium) on which a computer program or its commands or instructions according to the above aspect are stored. To execute the computer program, a computer or a computer network can access the computer-readable medium and read its contents. The storage medium is designed, for example, as a data memory, in particular at least partially as a volatile or non-volatile data memory. A non-volatile data memory can be a flash memory and / or an SSD (solid state drive) and / or a hard disk. A volatile data memory can be a RAM (random access memory). The commands can be present, for example, as source code of a programming language and / or as assembler and / or as binary code.

[0030] The control data may include a respective data set for positioning and / or focusing individual laser pulses in the cornea. Additionally or alternatively, the control data may include a respective data set for adjusting at least one beam device for beam guidance and / or beam shaping and / or beam deflection and / or beam focusing of a laser beam of the respective laser.

[0031] The respective method may include at least one additional step that is executed precisely when a use case or application situation occurs that has not been explicitly described here. This step may, for example, include outputting an error message and / or a request for user feedback. Additionally or alternatively, it may be provided that a default setting and / or a predetermined initial state is set.

[0032] A further aspect of the invention relates to a control device which is designed to carry out the steps of at least one embodiment of the method described above. For this purpose, the control device can have a computing unit for electronic data processing, such as a processor. The computing unit can comprise at least one microcontroller and / or at least one microprocessor. The computing unit can be embodied as an integrated circuit and / or microchip. Furthermore, the control device can comprise an (electronic) data memory or a memory unit. Program code which encodes the steps of the respective embodiment of the respective method can be stored on the data memory. The program code can comprise the control data for the respective laser.The program code can be executed by the computing unit, causing the control device to execute the respective embodiment. The control device can be embodied as a control chip or control unit. The control device can be comprised, for example, of a computer or computer network.

[0033] Further features and advantages of one of the described aspects of the invention may arise from the further development of another aspect of the invention. The features of the embodiments of the invention may thus be present in any combination with one another, unless explicitly described as mutually exclusive.

[0034] Additional features and advantages of the invention are described below with reference to the figure(s) in the form of advantageous exemplary embodiments. The features or combinations of features of the exemplary embodiments described below can be present in any combination with one another and / or with the features of the embodiments. This means that the features of the exemplary embodiments can supplement and / or replace the features of the embodiments, and vice versa. Thus, the invention also encompasses and discloses configurations that are not explicitly shown or explained in the figures, but which emerge and can be produced from the exemplary embodiments and / or embodiments through separate combinations of features.Thus, embodiments are also considered to be disclosed that do not have all the features of an originally formulated claim or that go beyond or deviate from the combinations of features set forth in the claims' references. The embodiments are shown in: Fig. 1 a schematic representation of a treatment device with a positioning device and an interface device according to an embodiment; and Fig. 2 a schematic flow diagram of a method according to an embodiment.

[0035] In the figures, identical or functionally identical elements are provided with the same reference numerals.

[0036] Fig. 1 shows a highly schematic representation of a treatment device 10 for treating an eye 16. The treatment device 10 has a laser 12 which is designed to generate laser radiation 20, wherein the laser radiation 20 can generate optical breakthroughs in the eye 16 for treating the eye. Preferably, the treatment device 10 and the laser 12 can be provided for laser eye treatment. However, the treatment device can also be used, for example, to provide further methods such as laser-induced refractive index change (LIRIC), photoinduced cross-linking of corneal tissue or similar methods. Furthermore, the laser can be operated in different power ranges above or below a threshold for ablation ora photodisruption or above or below a generation threshold of cavitation bubbles.

[0037] The treatment device 10 can have an optical axis 24, which can be an optical axis of the laser radiation 20 before impinging on the eye 16 in a rest position / neutral position of the deflection device 22. The eye 16 can have an optical axis 34, which can be, for example, a visual axis of the eye 16, which can be known from previously known patient data. Alternatively, the optical axis 34 of the eye 16 can also be defined, for example, as an axis of symmetry of the eye (for example, a central axis of the pupil of the eye 16), which can be determined, for example, by means of a measurement, for example, by an imaging method using an imaging device (not shown).

[0038] In addition to the laser 12, the treatment device 10 can have a control device 18, which can be configured to control the laser 12 using laser control data, so that it can emit pulsed laser pulses, in particular for treating the eye, for example, to form a cutting surface 14 within the cornea of ​​the eye 16, which can be defined by cavitation bubbles from individual treatment points. Furthermore, the control device 18 can control a three-dimensional focus adjustment device (not shown), so that the focus adjustment device focuses the laser beam 20 at predetermined positions, in particular at positions in or on the eye 16 and / or the interface device 30 predetermined by control data.

[0039] The laser 12 can preferably be a photodisruptive and / or ablative laser configured to emit laser pulses in a wavelength range between 300 nm and 1400 nm, preferably between 700 nm and 1200 nm, with a respective pulse duration between 1 fs and 1 ns, preferably between 10 fs and 10 ps, ​​and a repetition frequency greater than 10 kHz, preferably between 100 kHz and 100 MHz. The control device 18 optionally also comprises a memory device (not shown) for at least temporarily storing at least one control data set, wherein the control data set(s) comprise control data for positioning and / or focusing individual laser pulses.

[0040] Furthermore, the treatment device 10 can comprise an interface device 30 that is transparent to the laser radiation 20. The interface device 30 can be attached to the movement device 40, which in turn can be attached to a housing or body 11 of the treatment device 10. The interface device 30 can be provided to perform micro-movements on an object, for example an eye, for treatment with the laser 12 at a position. For this purpose, the interface device 30 can have a contact surface that represents a side of the interface device 30 that can be placed on the object. The contact surface preferably has a shape that is adapted for the treatment of the object; in the case of an eye treatment, a curved shape, for example a semicircle or an elliptical shape, can be provided.On the side facing the laser 12, the interface device 30 can have an entrance surface through which the laser radiation 20 can pass through the interface device 30 which is transparent to the laser radiation 20.

[0041] The interface device 30 can have an optical axis 32, which can result, for example, from the curvature of the interfaces of the contact surface and the entrance surface. Furthermore, the optical axis 32 can result from differences in the refractive index at the interfaces or from other interfaces in the interface device 30. The optical axis 32 describes an axis of symmetry of a laser radiation that can pass through the interface device 30 from the treatment device 10.

[0042] To prepare the treatment device 10, after attaching a contact element, an optical axis 32 of the interface device 30 or a shape of the interface device 30 can be determined. For this purpose, the interface device 30 can be scanned, for example, with the laser beam 20 in order to measure the contact surface and / or the entrance surface via a reflection of the interfaces. In this case, it is possible to operate the laser at a power that lies below a threshold for a material change in the eye 16 and / or the interface device 30.

[0043] This measurement of backscattered and / or reflected radiation can also be carried out confocally, for example. Furthermore, an image recording device can be provided, for example, which can image an optical axis 32 of the interface device and / or an optical axis 34 of the eye 16, a center point of the interface device 30, an apex of a cornea of ​​the eye 16, or another characteristic point of the eye 16 and / or the interface device 30 from a reflection of the laser beam 20 by means of an imaging method. The control device 18 can be configured to measure the position or orientation of the optical axis 32, 34 and in this way to determine an offset of the interface device 30 relative to an optical axis 24 of the laser beam 20.

[0044] The movement device 40 comprises at least one controllable actuator (not shown) and is configured to position the interface device 30 in at least one spatial direction using the controllable actuator depending on position control data. The movement device 40 can comprise a position scanner, a fine scanner, or a scanning device, which can be mounted between the treatment device 10 and the interface device 30. The control device 18 is configured to generate the position control data. The controllable actuator can be a piezo actuator, an electric motor, or the like.

[0045] The movement device 40 makes it possible to move the interface device 30 to a target position, or to move the interface device 30 at a target position in the form of micromovements during treatment with the laser 12. This can preferably be performed after docking the eye 16 in order to move the docked eye 16 relative to the optical axis 24 of the laser 12 and thus expand the treatment point. Furthermore, the exact shape of a cavitation bubble to be formed by the laser can be defined more precisely.

[0046] In this case, the control device 18 can generate position control data that causes the movement device 40 to move the interface device 30 to a target position, for example, to position the apex of the surface of the interface device 30 facing the eye 16 centrally over the pupil of the eye or to align the optical axis 32 of the interface device 30 and the optical axis 34 of the eye 16. While the treatment is taking place, the micromovements can be performed. These micromovements can occur in at least one spatial direction, in two spatial directions, or in three spatial directions.Furthermore, the movement device 40 can be designed to carry out a rotational movement, such as a rotational movement about the optical axis 24 of the laser beam 20 impinging on the eye 16 (in the rest position of the beam deflection unit), or a rotation about an axis perpendicular thereto.

[0047] The movement device 40 makes it possible to move the interface device 30 to a target position and / or to move it in the form of micro-movements, such as periodic or sinusoidal oscillations. The micro-movements of the movement device 40 or the interface device 30 can occur relative to the laser beam. The micro-movements can comprise movements in the range of a few µm. The micro-movements allow the interface device 30 to be moved, for example, with a docked eye 16, which in turn corresponds to a relative movement of the laser beam 20 with respect to the interface device 30 or the docked eye 16.

[0048] This makes it possible to vary the position at which the laser beam 20 is focused and at which the treatment takes place, thus enlarging the treatment point. This can, for example, reduce the size of a tissue bridge to the next treatment point and thus facilitate the separation of the treated tissue. Furthermore, by enlarging the treatment points in this way, the optical quality of a cut surface 14 can be improved because uncontrolled breakup of the tissue bridges is reduced.

[0049] Furthermore, the micromovements of the interface device 30 can be synchronized with the emission of the laser beam 20 from the laser 12. Furthermore, the micromovements can be periodic movements, in particular sinusoidal movements. Furthermore, the micromovements can be movements on the order of magnitude of less than 500 µm, preferably less than 100 µm, and more preferably less than 1 µm. Furthermore, the movement device can perform a two-dimensional movement in the sense of a 2D scanning method in order to enlarge the processing point along two spatial directions. The movement can occur along a direction of incidence of the laser beam or perpendicular thereto. Furthermore, the micromovements can be adjusted, for example, in amplitude and / or direction, in order to move the interface device such that the processing point moves along the cutting surface 14.

[0050] Fig.2 shows a schematic flow diagram of a method according to an exemplary embodiment.

[0051] In a step S1, the treatment device 10 can be prepared. This can include, for example, attaching the interface device 30 to the movement device 40. Furthermore, the interface device 30 can be brought closer to the eye 16 in order to contact the eye 16 or to dock the interface device 30 to the eye 16. Docking can occur, for example, by means of a negative pressure applied to the interface device 30 in order to suction the eye 16. Furthermore, other fixation methods are known in the prior art, which is why a further description of these is omitted here. Furthermore, step S1 can include determining offset data of the contacted eye 16 and / or can include determining offset data of a predetermined decentration of the eye 16 with respect to the treatment device 10, in particular of the laser beam 20.Optionally, data relating to an offset of the interface device 30 may be provided to the control device 18.

[0052] In a step S2, the control device 18 can generate position control data to generate micromovements that enlarge the processing points along the cutting surface 14. The position control data can be configured to move or position the interface device 30 relative to the laser beam 20 by means of the movement device 40. Furthermore, in step S2, the control device 18 can generate laser control data to control the laser device such that the laser 12 emits pulsed laser radiation 20 into or onto the eye 16. The laser control data is generated, for example, by the control device 18 to correct a visual impairment of the eye 16, which is determined based on predetermined patient examination data. The laser control data can include positions of processing points at which, for example, cavitation bubbles are to be formed in order to generate, for example, a cutting surface 14 or a lenticule.

[0053] In a step S3, the position control data is transmitted to the movement device 40 for controlling the movement device 40 by means of micro-movements that move the interface device 30 in at least one spatial direction. Furthermore, the laser control data can be transmitted to the laser device for irradiating a tissue to be treated in the eye 16 contacted by the interface device 30.

[0054] In a step S4, the laser device for treating the eye 16 with the laser 12 is controlled using the laser control data. For example, a cut surface 14 can be created in a cornea of ​​the eye 16. Furthermore, the movement device 40 is moved using the micromovements during irradiation by the laser 12 using the position control data in order to move the eye 16 docked to the interface device. Optionally, additional positioning can be performed with the movement device 40 during a treatment procedure with the laser 12, wherein the control device 18 can generate position control data depending on the determined position data of the interface device 30.

[0055] As an alternative to step S4, it may also be provided that the movement device 40 uses the position control data to perform the micromovements depending on the laser control data. Alternatively, it may be provided that only the position control data and the laser control data are generated to enable the treatment device to perform the micromovements during a treatment.

[0056] Optionally, one of the steps S1 to S4 described above or individual parts thereof can be omitted in order to increase the processing speed of the treatment device 10. Optionally, steps S1 to S4 can be repeated, performed in a different order, or even performed simultaneously, as far as this is technically possible.

[0057] Overall, the examples show how a treatment device, a method for controlling a treatment device, a computer program and a computer-readable medium can be provided. List of reference symbols: 10 Treatment device 11 housings 12 lasers 14 Cutting surface 16 Eye 18 Control device 20 laser beam 22 Deflection device 24 optical axis of the treatment device 30 Interface setup 32 optical axis of the interface device 34 optical axis of the eye 40 Movement device

Claims

[1] Treatment device (10) for treating a visual defect of a human or animal eye (16), the treatment device (10) comprising: - a laser device which is designed to irradiate a tissue of an eye (16) to be treated with a laser beam (20) from at least one ophthalmological laser (12), - an interface device (30) for eye contact, - a movement device (40) with at least one controllable actuating element, which is designed to move the interface device (30) in at least one spatial direction by means of the controllable actuating element and - a control device (18) which is designed to generate position control data for controlling the movement device (40), - wherein the control device (18) is designed to cause the movement device (40) by means of the position control data to move the interface device (30) in the form of micro-movements during the treatment with the laser (12). [2] Treatment device (10) according to claim 1, wherein the controllable actuating element comprises a piezo actuating element. [3] Treatment device (10) according to one of the preceding claims, wherein the movement device (40) is arranged and designed to carry out the micro-movements of the interface device (30) relative to the laser beam (20). [4] Treatment device (10) according to one of the preceding claims, wherein the control device (18) is additionally configured to generate laser control data for controlling the laser device. [5] Treatment device (10) according to claim 4, wherein the control device (18) is configured to generate the laser control data and the position control data such that the micro-movements of the interface device (30) are synchronized with an emission of the laser beam (20) from the laser device. [6] Treatment device (10) according to one of the preceding claims, wherein the micro-movements are periodic movements. [7] Treatment device (10) according to one of the preceding claims, wherein the micro-movements are movements of the order of magnitude of less than 500 µm, preferably less than 100 µm, and more preferably less than 1 µm. [8] Treatment device (10) according to one of the preceding claims, wherein the movement device (40) is configured to move the interface device (30) in a first spatial direction at a first speed and to move the interface device (30) in a second spatial direction at a second speed, wherein the first speed is greater than the second speed, in particular the first speed is a multiple of the second speed. [9] Treatment device (10) according to one of the preceding claims, wherein the movement device (40) is configured to move the interface device (30) along an irradiation direction of the laser beam (20), and the micromovements during a marginal cut in a cornea of ​​the eye (16) move the interface device (30) along this irradiation direction. [10] Treatment device (10) according to one of the preceding claims, wherein the movement device (40) is further configured to move the interface device (30) perpendicular to an irradiation direction of the laser beam (20). [11] Treatment device (10) according to one of the preceding claims, wherein the micromovements are adapted depending on a current irradiation position of the laser beam (20). [12] Treatment device (10) according to one of the preceding claims, wherein the movement device (40) is adapted to move the interface device (30) by means of a displacement, rotational movement and / or a tilting movement. [13] A method for controlling a treatment device (10) according to any one of the preceding claims, the method comprising the steps of: - generating the position control data by the control device (18); - generating the laser control data by the control device (18); - transmitting the position control data to the movement device (40) for controlling the movement device (40) by means of micro-movements which move the interface device (30) in at least one spatial direction; - transmitting the laser control data to the laser device for irradiating a tissue to be treated of an eye (16) contacted by the interface device (30); and - Moving the movement device (40) by means of the micro-movements during the irradiation of the eye (16) by the laser (12). [14] A computer program comprising instructions which cause the treatment device (10) 10 to carry out the method according to claim 13 when the program is executed. [15] A computer-readable medium on which a computer program according to claim 14 is stored.

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