JP2021058666A - Automated fine adjustment of ophthalmic surgery support - Google Patents

Abstract

To provide a system for automated fine adjustment of an ophthalmic surgery support in which an eye tracking system detects a detectable position of an eye.SOLUTION: A direction and distance a support must be adjusted for an eye to be centered may be determined based on a detectable position. A control signal is generated and transmitted to a control device that adjusts a position of the support to center the eye. The disclosure further provides a method for automated fine adjustment of a support, which includes detecting a detectable position of an eye, detecting whether the eye is centered in relation to the center of a detection field of an eye tracking system based on the detectable position, determining a direction and a distance the detectable position must be adjusted to be centered, and generating and transmitting a control signal to adjust the position of the support.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to ophthalmic surgery and surgical instruments, and more specifically to systems and methods for automatic fine-tuning of supports.

Eye surgery saves and improves the vision of tens of thousands of patients each year. However, given the sensitivity of vision to even smaller changes in the eye and the delicate and subtle nature of many eye structures, eye surgery is difficult to perform and reduces less important or uncommon errors in surgical techniques. Or even a slight improvement in the accuracy of the surgical technique can make a very large difference in the patient's visual acuity after surgery.

Eye surgery is surgery performed on the eye or any part of the eye. Eye surgery is usually performed to repair retinal defects, repair eye muscles, remove cataracts or cancer, or restore or improve vision. For example, refractive eye surgery is a type of eye surgery used to improve the refractive state of the eye for the purpose of reducing or eliminating dependence on eyeglasses or contact lenses. Refractive surgery procedures can include surgical remodeling of the cornea and can be performed by laser.

In refractive surgery and various other ophthalmic surgical procedures, removal using a laser to remove tissue can be performed. When performing eye surgery with a laser, eye tracking systems often center or otherwise control the position of the laser, monitor the position of the eye, and keep the eye in an acceptable position through surgical procedures. Used to assist in doing so. Through ophthalmic surgery, the patient is placed on a support.

The present disclosure provides a system for automatic fine-tuning of ophthalmic surgery supports. The system has a support, a control device that can operate to control the position of the support, and a line of sight that can detect the detectable position of the eye and generate data related to the detectable position. A processing system that includes a tracking system and at least one programmed processing device that receives data related to the detectable position from the line-of-sight tracking system and is capable of detecting the eye at the center of the detection field of the line-of-sight tracking system. Determining the position, determining the direction and distance at which the detectable position of the eye must be adjusted to be centered with respect to the center of the line-of-sight tracking system, and detecting the eye-tracking system. Generating a control signal that can operate to adjust the position of the support so that it is centered with respect to the center of the field, and sending this control signal to the control device to adjust the position of the support. Includes a processing system that can operate to do and.

In additional embodiments that can be combined with each other unless explicitly exclusive, the support is a sofa or bed and can operate to enter confirmation, the device for manual confirmation of adjustment is a switch, key. Or being a joystick, adjusting the position of the support so that the eye is centered with respect to the center of the detection field of the line-of-sight tracking system is automatic without manual confirmation, or automatic, but manual confirmation. Adjusting the position of the support is performed only afterwards during device calibration or femtosecond laser surgery suction cones, including eye tracking system initialization, surgery, device calibration, automatic fine-tuning of test targets. Performed during the docking procedure.

The present disclosure further provides a method of automatic fine-tuning of the support. The method detects the detectable position of the eye, generates data related to the detectable position, processes the data related to the detectable position, and refers to the center of the detection field of the eye tracking system. Determining the detectable position of the eye, determining the direction and distance at which the detectable position of the eye must be adjusted to be centered with respect to the center of the detection field of the eye tracking system, and determining the eye's line of sight. Generating control signals that can be actuated to adjust the eye surgery support to be centered with respect to the center of the detection field of the tracking system, and control that can be actuated to adjust the position of the eye surgery support. Includes sending control signals to the device.

In additional embodiments that can be combined with each other unless expressly exclusive, the support is a sofa or bed and the position of the eye surgery support so that the eye is centered with respect to the center of the detection field of the line-of-sight tracking system. Adjustments are made automatically, without manual confirmation, or automatically, but only after manual confirmation, and adjusting the position of the support is during eye tracking system initialization, during surgery. It is performed during device calibration, during device calibration, including automatic fine-tuning of test targets, or during the suction cone docking procedure for femtosecond laser surgery.

The above system can be used by the above methods and vice versa. In addition, any system described herein can be used by any method described herein and vice versa.

In order to understand the present invention and its features and advantages in more detail, the following description is referred to herein in conjunction with the accompanying drawings which are not proportional to the actual size. In the drawings, similar reference numerals refer to similar features.

FIG. 3 is a schematic representation of the elements of a surgical system for automatic fine-tuning of an ophthalmic surgery support. It is a digitally processed image of a pupil decentered with respect to the center of the detection field of the line-of-sight tracking system. It is a digitally processed image of the pupil centered with respect to the center of the detection field of the line-of-sight tracking system. A digitally processed image of the pupil within effective range for centering with respect to the center of the detection field of the eye tracking system, the pupil can be placed closer to the actual center of the detection field by automatic fine-tuning of the eye surgery support. .. It is a flowchart of the method of performing automatic fine adjustment of an ophthalmic surgery support.

In the following specification, the details are illustrated as an example to facilitate the discussion of the subject matter to be disclosed. However, it should be apparent to those skilled in the art that the disclosed embodiments are exemplary and do not cover all possible embodiments.

The present disclosure provides systems and methods for automatic fine-tuning of supports used in ophthalmic surgery. During eye surgery, the patient is placed on a support (eg, sofa or bed). Eye tracking systems are used to determine eye position, monitor eye position, and help maintain the eye in an acceptable position through surgical procedures. The first tracking motion is first used to determine the position of the eye to determine if the eye is centered with respect to the detection field of the line-of-sight tracking system. Once centered, a second follow-up motion can be initialized to monitor eye position throughout the surgical procedure.

The line-of-sight tracking system should be first centered before the second tracking action can be initialized to monitor eye position through surgical procedures. The line-of-sight tracking system can be centered on any point in the eye (eg, the cornea or other structure of interest). If the eye is not centered prior to the initialization of the second line-of-sight tracking system, this can result in interference that affects further tracking. Such interference can lead to unwanted offsets and rotations that can result in elimination and other higher order aberration errors. The present disclosure provides a system and method for automatic fine-tuning of a support for centering the eye with respect to the center of the detection field of a line-of-sight tracking system.

For automatic fine-tuning, the systems of the present disclosure receive data from a support, a control device that adjusts the position of the support, a line-of-sight tracking system, and a line-of-sight tracking system, and the detection field of the line-of-sight tracking system. Determines the position of the eye with respect to the center, generates a control signal to adjust the position of the support so that the eye is centered with respect to the center of the detection field of the line-of-sight tracking system, and adjusts the position of the support. To provide a processing system that transmits this control signal to the control device. Since any camera in the line-of-sight tracking system can be focused at any possible distance by adjusting or exchanging the camera's optics, such as a lens, automatic fine-tuning is that the eye is initially placed at a threshold distance. Can be done without.

The systems and methods of the present disclosure offer users many advantages. For example, ophthalmic laser surgery that implements such systems and methods is more reliable because processing errors due to improper eye alignment can be minimized and automatic adjustment is faster than manual adjustment. The automatic fine-tuning system can detect the target position more precisely than the user can do, so that the patient can be placed more accurately than the manual adjustment. The auto-adjustment is also more accurate and precise because the target data of the eye is available in at least the XY plane of the detectable range. The XY plane is defined as a plane approximately perpendicular to the top of the cornea. A defined offset may be implemented to initiate line-of-sight tracking starting from a defined position offset from the cornea or other defined starting position. Automatic fine-tuning can also be used for device calibration, such as calibration using test targets, and when docking suction cones in femtosecond laser eye surgery.

Here, with reference to the accompanying drawings, FIG. 1 is a schematic view of the elements of the system 100 for automatic fine-tuning of the ophthalmic surgery support. The system 100 includes a support 120 that is connected to the control device 125 and can operate to adjust the position of the support, a line-of-sight tracking system 105, and a processing system 150. During eye surgery, the patient is placed on support 120. The line-of-sight tracking system 105 includes at least one camera 110 that can operate to detect the detectable position of the eye 130 and generate data related to the detectable position. The camera may include an autofocus function. The line-of-sight tracking system 105 transmits data related to the detectable position to the processing system 150. The processing system 150 processes data related to the detectable position in order to determine the position of the eye and whether the eye is centered with respect to the center of the detection field 115 of the line-of-sight tracking system. Any point in the eye can be defined as a point centered with respect to the center of the detection field. For example, the pupil 134 or the central point of any other structure of interest. A specified offset may also be specified so that the tracking operation is initialized from the specified offset with respect to the centering point. The system 100 may further include a device 160 and a display 170 for manual confirmation of adjustments. The device 160 for manual confirmation can be any device (eg, a button, switch, key or joystick) from which confirmation can be entered. The device 160 for manual confirmation can also be a non-contact device that can input confirmation by voice recognition or gesture control, for example.

The processing system 150 wirelessly or via a wired connection to the line-of-sight tracking system 105, the control device 125, and in some embodiments other system components including the device 160 and the display 170 for manual confirmation of adjustment. Is connected. As shown in FIG. 1, the processing system 150 receives data related to the detectable position of the eye from the eye tracking system 105 and determines whether the center point of the pupil 134 is centered on the detection field 115. Process this data to do so. If the center point of the pupil 134 is not centered with respect to the detection field 115, the processing system 150 determines the direction and distance in which the support 120 must be adjusted with respect to the center point of the centered pupil 134. The processing system 150 generates a control signal for automatic fine adjustment, which indicates a direction and a distance for adjusting the support, and transmits the control signal to the control device 125. The system 100 may be configured to require an adjustment manual confirmation entered through the device 160 before the automatic fine adjustment is made. For example, if the system is configured to require manual confirmation, the control device will not adjust the support until manual confirmation is entered. In another example, if the system is configured so that it does not require manual verification, the control device automatically adjusts the support without manual verification. In this example, the control device may, if necessary, continuously adjust the support throughout the surgical procedure based on the judgment of the processing system 150. This ability can be particularly useful in compensating for patient movement.

The processing system 150 may also generate a graphical description based on the received data relating to the detectable position of the eye. Graphical descriptions may be transmitted to display 170 for presentation as images during eye surgery. The image may include, for example, the position of the eye 172, the center of the pupil 174, the detection field 176 of the line-of-sight tracking system 105 and the center 178 of the detection field 176. The image may further include an indicator of whether the center of the pupil 174 is centered with respect to the center 178 of the detection field 176. To indicate whether the center of the pupil 174 is centered, the image may include a color graphic (eg, a green graphic) indicating that the pupil was centered and an orange graphic indicating that the pupil was not centered. The display 170 may further indicate whether automatic fine-tuning is required to center the center of the pupil 174. If the system is configured to require manual adjustment, the image may further include indicators that the adjustment is awaiting manual confirmation, including the direction and distance determined for adjustment. If the system is not configured to require manual adjustment, the image may further include indicators that the adjustment has been made or is about to be made (including the direction and distance determined for the adjustment).

The processor 152 of the processing system 150 interprets and / or executes, for example, a microprocessor, a microcontroller, a digital signal processor (DSP), an application specific integrated circuit (ASIC), or a program instruction and / or processes data. It may include any other digital or analog circuit configured as such. In some embodiments, the processor 152 can interpret and / or execute program instructions and / or process data stored in memory 154. Memory 154 may be configured partially or wholly as application memory, system memory, or both. The memory 154 may include any system, device or apparatus configured to hold and / or accommodate one or more memory modules. Each memory module may include any system, device or device (eg, computer-readable medium) configured to hold program instructions and / or data over a period of time. The various servers, electronic devices or other machines described may include one or more similar such processors or memories for storing and executing program instructions for performing the functions of the associated machine. ..

FIG. 2 is a digitally processed image 200 of the pupil 222 of the eye 220, which is off-center with respect to the detection field of the line-of-sight tracking system 250 and requires further adjustment for centering. To assist in centering the pupil, the image shown in FIG. 2 presents a graphic showing a centering effective range 205. The centering effective range 205 can be visually represented by a square. The squares can be colored to indicate that the eye is still not centered (eg orange squares). As shown in FIG. 2, the square can also be shown by a solid line to indicate that the eye is not centered. In contrast, the square can be indicated by a dotted line to indicate that the eye has been centered, as shown in FIG. To aid centering, the image further shows the X-axis 212 and the Y-axis 214 defined with respect to the xy plane approximately perpendicular to the apex of the cornea. It is important to center the pupil at the center of the detection field of the line-of-sight tracking system 250 before further initialization of the tracking motion. This is because the accuracy of subsequent tracking operations depends on a properly centered starting point. In FIG. 2, the center of the pupil 224 should be adjusted to be centered with respect to the center of the detection field 250.

FIG. 3 is a digitally processed image 300 of the pupil 222 of the eye 220, which is centered with respect to the center of the detection field of the line-of-sight tracking system 250 and does not require further adjustment for centering. To assist in centering the pupil, the image shown in FIG. 3 presents a graphic showing a centering effective range 205. The centering effective range 205 can be visually represented by a square. The squares can be colored to indicate that the eye is still not centered (eg, green squares). As shown in FIG. 3, the square can also be indicated by a dotted line to indicate that the eye has been centered. To aid centering, the image further shows the X-axis 212 and the Y-axis 214 defined with respect to the xy plane approximately perpendicular to the apex of the cornea. It is important to center the pupil at the center of the detection field of the line-of-sight tracking system 250 before further initialization of the tracking motion. This is because the accuracy of subsequent tracking operations depends on a properly centered starting point. In FIG. 3, the center of the pupil 224 does not require further adjustment to be centered with respect to the center of the detection field 250.

FIG. 4 is a digitally processed image 400 of the pupil 224 within the centering effective range 205 with respect to the center of the detection field of the line-of-sight tracking system. It shows that it could be placed closer to the center of. The effective range 205 for centering can be visually represented by a square. The squares can be colored to indicate that the eye has been centered. The square can also be indicated by a dotted line to indicate that the eye has been centered. In FIG. 4, for example, the square is indicated by a dotted line indicating that the center of the pupil 224 is within the centering effective range 205. However, the center of the pupil 224 is still not centered with respect to the center of the detection field of the line-of-sight tracking system 250. To aid centering, the image further shows the X-axis 212 and the Y-axis 214 defined with respect to the xy plane approximately perpendicular to the apex of the cornea. The centering error 460 is shown in the upper left corner of the centering effective range 205. The automatic fine-tuning can be used to correct the error 460 by adjusting the pupil 224 in the direction 480 until it reaches the ideal position 470.

FIG. 5 is a flowchart of the method 500 for performing automatic fine adjustment of the ophthalmic surgery support. In step 505, the input indicating the position of the eye is received by a processor having memory. In step 510, the position of the eye is evaluated to determine if the eye is centered with respect to the center of the detection field of the line-of-sight tracking system. If the eye is centered with respect to the center of the detection field of the line-of-sight tracking system, the automatic fine-tuning process ends at 580. If the eye is not centered to the center of the line-of-sight tracking system detection field, at 515 the direction and distance that the eye must be adjusted to be centered to the center of the line-of-sight tracking system detection field is determined. Can be done.

In step 520, control signals indicating distances and directions that can be adjusted for the eyes to be centered with respect to the center of the detection field of the line-of-sight tracking system are generated for automatic fine-tuning. In step 525, it is determined whether manual confirmation is necessary to make the automatic fine adjustment. If no manual confirmation is required, at 530, automatic fine-tuning may be made automatically without manual confirmation. If manual confirmation is required, at 535 it may be determined whether a manual confirmation has been entered. If manual confirmation has been entered, at 530, automatic fine-tuning may be made automatically without manual confirmation. However, if the manual confirmation has not yet been entered, at 590 the generated control signal may remain on standby and no automatic fine-tuning will be performed until the manual confirmation is entered. In step 590, the generated control signal may remain awaited before or after being transmitted to the support control device.

The patient can be placed within the detection range of the line-of-sight tracking system before any step of the method is performed. A warning can be generated if the patient is not within the detection range at the beginning of the method execution or if the patient moves out of the detection range during the method execution.

Method 500 can be performed using the system of FIG. 1 or any other suitable system. Suitable initialization points for such methods and the order of their steps may depend on the embodiment selected. In some embodiments, some steps may optionally be omitted, repeated or combined. In some embodiments, some steps of such a method may be performed in parallel with other steps. In some embodiments, the method can be partially or fully embodied in software within a computer-readable medium.

For the purposes of the present disclosure, a computer-readable medium may include any means or set of means capable of retaining data and / or instructions over a period of time. Computer-readable media are, but are not limited to, storage media such as direct access storage devices (eg, hard disk drives or floppy disks), sequential access storage devices (eg, tape disk drives), compact disks, CD-ROMs, DVDs, random access memory. Communication media such as (RAM), read-only memory (ROM), electrically erasable PROM (EEPROM) and / or flash memory, wired, optical fiber and other electromagnetic and / or optical carriers, and / or these. It may include any combination.

The subject matter disclosed above should be considered exemplary and not limiting, and the appended claims are such amendments, extensions and other practices that fall within the spirit and scope of this disclosure. It is intended to include all forms. Therefore, to the maximum extent permitted by law, the scope of this disclosure should be determined by the broadest acceptable interpretation of the claims and their equivalents below, and the detailed description to date. Not limited or limited by.

Claims (20)

A system for automatic fine-tuning of eye surgery supports,
A control device that can operate to control the position of the support,
A line-of-sight tracking system capable of detecting the detectable position of the eye and generating data related to the detectable position.
A processing system that includes at least one programmed processing device.
Receiving data related to the detectable position from the line-of-sight tracking system and
Determining the detectable position of the eye with respect to the center of the detection field of the line-of-sight tracking system
Determining the direction and distance at which the detectable position of the eye must be adjusted to be centered with respect to the center of the detection field of the line-of-sight tracking system.
Generating a control signal that can operate to adjust the position of the support so that the detectable position of the eye is centered with respect to the center of the detection field of the line-of-sight tracking system.
A system comprising a processing system capable of transmitting and performing the control signal to the control device to adjust the position of the support. The system according to claim 1, wherein the support is a sofa. The system according to claim 1, wherein the support is a bed. The first aspect of claim 1, wherein adjusting the position of the support so that the eye is centered with respect to the center of the detection field of the line-of-sight tracking system is performed automatically without manual confirmation. system. 1. Adjusting the position of the support so that the eye is centered with respect to the center of the detection field of the line-of-sight tracking system is automatic, but only after manual confirmation. The system described in. The system according to claim 1, wherein adjusting the position of the support is performed during the initialization of the line-of-sight tracking system. The system of claim 1, wherein the automatic fine-tuning of the support is performed during surgery. The system of claim 1, wherein the automatic fine-tuning of the support is performed during device calibration. The system of claim 8, wherein the device calibration comprises automatic fine-tuning of the test target. The system of claim 1, further comprising a device for manual confirmation of adjustment, which is capable of operating to enter confirmation. 11. The system of claim 11, wherein the device for manual confirmation of the adjustment is a button, switch, key or joystick, or by voice recognition or gesture control. It is a method of automatic fine adjustment of the support.
Detecting the detectable position of the eye and
Generating data related to the detectable position and
Processing the data related to the detectable position and
Determining the detectable position of the eye with respect to the center of the detection field of the line-of-sight tracking system.
Determining the direction and distance at which the detectable position of the eye must be adjusted to be centered with respect to the center of the detection field of the line-of-sight tracking system.
Generating a control signal that can be operated to adjust the ophthalmic surgery support so that the detectable position of the eye is centered with respect to the center of the detection field of the eye tracking system.
A method comprising transmitting the control signal to a control device capable of operating to adjust the position of the ophthalmic surgery support. 12. The method of claim 12, wherein the support is a sofa. 12. The method of claim 12, wherein the support is a bed. 12. The method of claim 12, wherein adjusting the support to center the eye with respect to the center of the detection field of the line-of-sight tracking system is performed automatically without manual confirmation. 12. The method of claim 12, wherein adjusting the support to center the eye with respect to the center of the detection field of the line-of-sight tracking system is automatic, but only after manual confirmation. The method of claim 12, wherein the automatic fine-tuning of the support is performed during the initialization of the line-of-sight tracking system. The method of claim 12, wherein the automatic fine-tuning of the support is performed during surgery. The method of claim 12, wherein the automatic fine-tuning of the support is performed during device calibration. 19. The method of claim 19, wherein the device calibration comprises automatic fine-tuning of the test target.

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