Capsulotomy device

Abstract

A capsulotomy device is disclosed that differentially applies a power source for incising the capsulotomy to a capsulotomy section depending on a contact state of an electrode with the capsulotomy. The disclosed device is a capsulotomy device having a capsulotomy section for incising the capsulotomy enclosing a lens, and includes a measurement section that measures an impedance when an electrode of the capsulotomy section is in contact with the capsulotomy, a state determination section that determines a current contact state of the electrode in contact with the capsulotomy based on the impedance measured by the measurement section, and a power application section that applies a differential power source for incising the capsulotomy to the capsulotomy section depending on the contact state determined by the state determination section.

Description

[Technical Field]

[0001] The present invention relates to a capsulotomy device, and more particularly to a capsulotomy device capable of incising the anterior surface of a capsular bag that encases the crystalline lens of an eyeball. [Background technology]

[0002] The eye (eyeball), which is part of the body, is an organ that senses the intensity and wavelength of light to ensure vision. It is formed to wrap around the outside of the sclera and is made of transparent, avascular tissue. It includes the cornea, which refracts light, the colorless, transparent crystalline lens that acts as a camera lens, the iris, which contains pigment and determines the color of the eye and acts as an aperture to adjust the amount of light entering the eye, and the retina, which is the part that corresponds to the film in a camera and is made of transparent nerve tissue.

[0003] As mentioned above, the crystalline lens that makes up the eye is like a camera lens, and just as a dirty lens reduces the clarity of a photograph, if the lens becomes cloudy, light cannot pass through the eye properly, causing objects to appear blurry. When the crystalline lens becomes cloudy due to various causes like this, it is called a cataract.

[0004] Therefore, when cataracts occur, prompt treatment is required to prevent vision loss or loss, and a commonly used method for treating cataracts is to incise the lens capsule surrounding the lens, crush the lens located inside using ultrasound, remove the crushed lens using ultrasound, or the like, and insert an intraocular lens in place of the removed lens. That is, a diamond knife or the like is used to make an incision of approximately 2 to 3 mm in width in the sclera or cornea, and a cutting tool with a bent needle tip is inserted through the incision to scrape off the anterior surface of the lens capsule and remove it into a predetermined shape. The exposed lens is crushed using ultrasound, and the crushed lens is then suctioned out and an intraocular lens is inserted and fixed in place of the incision.

[0005] The incision of the lens capsule is a crucial step in ensuring the safety of cataract surgery. The surgeon makes a microincision in the cornea, inserts a dissector through the incision, and scrapes the anterior surface of the lens capsule several times to expose the lens. The microincision of the cornea must be kept to a minimum to ensure postoperative recovery and stable vision, and dissectors that require excessive incisions cannot be used during actual surgery. Furthermore, when using a dissector, the surgeon must carefully move the dissector several times to incise the anterior surface of the lens capsule, which can be complicated and time-consuming. Therefore, when using a dissector, it is difficult to cleanly and accurately incise the lens capsule to the appropriate size and shape. Failure to incise the lens capsule to the appropriate size and shape can result in radial rupture.

[0006] Therefore, there is a need for the development of an apparatus that can quickly and accurately incise the lens capsule in a circular shape. Summary of the Invention [Problem to be solved by the invention]

[0007] In order to solve the above-mentioned problems of the conventional art, an object of the present invention is to provide a capsulorhexis device that differentially applies power to a capsulorhexis part for incising the capsulorhexis depending on the contact state of an electrode with the capsulorhexis. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a capsulorhexis device that differentially applies power to a capsulorhexis portion for incising the lens capsule depending on the contact state of an electrode with the lens capsule. [Effects of the Invention]

[0009] According to the capsulotomy device of the present invention, power for incising the lens capsule can be applied to the capsulotomy unit differentially depending on the state of contact between the electrode and the lens capsule. Therefore, the capsulotomy unit can quickly and accurately incise the lens capsule in a circular shape using heat or plasma generated by the applied current or high-frequency power depending on the state of contact between the electrode and the lens capsule. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating a schematic view of a human eyeball; [Figure 2] 1 is a diagram showing a schematic diagram of a capsulotomy device to which the present invention can be applied. [Figure 3a] FIG. 3 is an enlarged view of the capsulotomy portion of the capsulotomy device shown in FIG. 2. [Figure 3b] FIG. 3 is an enlarged view of the capsulotomy portion of the capsulotomy device shown in FIG. 2. [Figure 4] 3 is a diagram showing a state in which the capsular incision portion shown in FIG. 2 is inserted into a guide portion. FIG. [Figure 5] 3 is a diagram for explaining a modified example of the capsular incision portion shown in FIG. 2. FIG. [Figure 6] 1 is a block diagram of a capsulotomy device according to an embodiment of the present invention. [Figure 7] 7 is a graph used to explain the measurement unit shown in FIG. 6. [Figure 8] 10 is a flowchart illustrating the operation of the capsulotomy device according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] One aspect of the present invention is a capsulotomy device having a capsulotomy section for incising a lens capsule, the capsulotomy device including: a measurement section for measuring impedance when an electrode of the capsulotomy section is in contact with the lens capsule; a state determination section for determining the current contact state of the electrode in contact with the lens capsule based on the impedance measured by the measurement section; and a power application section for applying differential power to the capsulotomy section for incising the lens capsule depending on the contact state determined by the state determination section. While the present invention may be modified in various ways and may have various embodiments, specific embodiments have been shown by way of example in the drawings and will be described in detail.

[0012] However, it should be understood that this is not intended to limit the invention to any particular embodiment, but rather to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

[0013] The terms used in this application are merely used to describe specific embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood not to preclude the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0014] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention pertains. Terms as defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly and specifically defined in this application.

[0015] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In order to facilitate overall understanding of the present invention, the same components in the drawings will be designated by the same reference numerals, and redundant descriptions of the same components will be omitted.

[0016] FIG. 2 is a diagram schematically illustrating a capsulotomy device to which the present invention can be applied, FIG. 3 is a plan view of the capsulotomy device shown in FIG. 2, FIG. 4 is a diagram illustrating the state in which the capsulotomy portion shown in FIG. 2 has been inserted into a guide portion, and FIG. 5 is a diagram for explaining a modified example of the capsulotomy portion shown in FIG. 2.

[0017] Referring to the same figure, the applicable capsulotomy device 100 of the present invention can be inserted into an incision site 22 in the cornea 20 or an incision site (not shown) in the sclera 10 to make a circular incision in a portion of the capsular bag 50 that encases the lens 30.

[0018] The capsulotomy device 100 according to the present invention includes a capsulotomy unit 110, a main body unit 120, and a button unit .

[0019] The capsular incision portion 110 has a closed curve shape and can be inserted into the incision site 22 of the cornea 20 or the incision site (not shown) of the sclera 10 to make a circular incision in the capsular bag 50 .

[0020] That is, the capsular incision unit 110 can heat the moisture in the capsular bag 50 that comes into contact with the capsular incision unit 110 in a short period of time using heat or plasma generated by a predetermined current or high-frequency power for incising the capsular bag, which is applied from the power supply unit (shown in Figure 6) described later, to incise the capsular bag 50 in a circular shape.

[0021] 3a, the circular loop-shaped capsular incision 110 is formed by a wire rope made of multiple metal wires 101 or metal strands twisted together. The wire rope has a structure in which multiple strands are twisted together, and as an example, it may have a structure in which multiple strands are twisted around a central rope core.

[0022] In the present embodiment, the looped electrodes are formed of 1x7 wire ropes, but wire ropes of different structures may be used. Each strand may be made of single or multiple strands of wires of the same or different diameters, or may be made of a single wire.

[0023] The wire rope structure, which is made up of multiple conductive metal strands twisted together, has superior elasticity and restoring force compared to a single wire, so the wire rope electrode portion that passes through the nozzle-shaped insertion portion has excellent restoring force.

[0024] The insulating coating layer (not shown) applied to the periphery of the capsulorhexis 110 preferably has a color that contrasts with the color of the eyeball.

[0025] Referring to FIG. 3b, the capsular incision 110 can include a circular incision 111, a moving member 115, and a current application member (not shown).

[0026] Here, the circular incision tool 111 includes a first wire 112 and a second wire 113 , and may further include a coated wire 114 .

[0027] The circular incision tool 111 makes a circular incision in the lens capsule 50 .

[0028] The moving member 115 has one end connected to the circular incision tool 111, and slides the circular incision tool 111 by operating a button portion 130, which will be described later.

[0029] The first wire 112 may be the active electrode and the second wire 113 may be the return electrode.

[0030] For example, when current is applied to the capsular incision 110, the current is applied to the first wire 112 through a current application member (not shown), and the current applied to the first wire 112 flows to the second wire 113, which is the return electrode.

[0031] As an example, if a circular incision tool is formed using only a circular wire as the active electrode, as shown in Figure 3a, and a return electrode (not shown) is placed on the patient's thigh or arm so as to be spaced apart from the wire, the current applied through the wire will pass through the body and be applied to the return electrode (not shown), but power fluctuations will occur due to differences in the individual body resistance of the patient.

[0032] To solve this problem, as shown in Figure 3b, a circular incision tool 111 is formed by disposing a first wire 112 and a second wire 113 on either side of the wire with a coated wire 114 in between. The coated wire 114 can maintain a constant resistance between the two electrodes 112 and 113, thereby reducing power fluctuations.

[0033] The insulating coating layer (not shown) applied to the periphery of the coated wire 114 preferably has a color that contrasts with the color of the eyeball, so that the surgeon can easily determine whether the circular incision tool 111 inserted into the incision site 22 of the cornea 20 is accurately positioned at the center of the anterior surface of the lens capsule 50.

[0034] The circular incision tool 111 is made by twisting together the first wire 112, the second wire 113, and the coated wire 114 in a rope-like shape, which allows for further increased elasticity, and it is preferable that the first wire 112 and the second wire 113 are made of a metallic material having elasticity.

[0035] The capsular incision portion 110 slides inside the main body portion 120 and is exposed to the outside of the main body portion 120 when the capsular bag 50 is incised, as shown in Figure 3b, and is inserted inside the main body portion 120 when the capsular bag 50 is not cut, as shown in Figure 4.

[0036] The main body portion 120 includes a guide portion 122 and a body 124 .

[0037] The guide portion 122 slides inside the capsular incision portion 110 and serves to guide the capsular incision portion 110 through the incision site 22 in the cornea 20 .

[0038] The guide portion 122 is made of a silicon material, and a movement hole 122a is formed in the center of the guide portion 122, through which the capsular incision portion 110 slides.

[0039] The guide part 122 has a movable hole 122a formed therein, which allows the capsulotomy part 110 to slide within the movable hole 122a. In this case, when the capsulotomy part 50 is cut, the capsulotomy part 110 is exposed to the outside from the inside of the movable hole 122a, and when the capsulotomy part 50 is not cut, the capsulotomy part 110 remains inserted within the movable hole 122a.

[0040] Although the guide portion 122 is described as being made of silicon material, it is not limited to this and may be made of other materials than silicon.

[0041] One end of the guide portion 122 is connected to the body 124, and the movable member 115 of the capsular incision portion 110 slides inside the body 124, and it is preferable that a movable hole (not shown) through which the movable member 115 slides is formed inside the body 124.

[0042] The guide part 122 connected to the body 124 is preferably connected to the body 124 so as to be inclined, and one end of the moving member 115 connected to the circular incision tool 111 is preferably formed so as to be inclined.

[0043] Since the body 124 and the guide portion 122 are connected at an angle and the movable member 115 is formed at an angle, the surgeon can easily perform the task of making a circular incision in the lens capsule 50 using the circular incision tool 111 after inserting the guide portion 122 into the incision site 22 of the cornea 20 or the incision site (not shown) of the sclera 10.

[0044] A button 130 is formed on one surface of the main body 120, causing the capsular incision portion 110 to slide inside the main body 120. The capsular incision portion 110 slides when the surgeon operates the button 130, and is exposed inside the main body 120 to make a circular incision in the capsular bag 50, or is inserted into the main body 120.

[0045] 5, the capsulotomy portion 110 may further include a current guide member 117. Also, as shown in FIG. 5, the main body portion 120 may further include a first button portion 118.

[0046] The current guide member 117 slides to be inserted into the body 120 or exposed to the outside.

[0047] When exposed to the outside of the body 120 , the current guide member 117 is located at the center of the circular cutting tool 111 and serves to guide the flow of current to the center of the circular cutting tool 111 .

[0048] The current guide member 117 may include a moving bar 117a and a current guide piece 117b.

[0049] The current-inducing member 117 is slid by operating a first button 118 formed on one side of the main body 120 so as to be spaced apart from the button portion 130, and is inserted into the inside of the main body 120 or exposed to the outside.

[0050] One end of the moving bar 117a is connected to a first button portion 118, and the other end is moved to the center of the circular incision tool 111 by operating the first button 118.

[0051] The current guide piece 117b is integrally provided on the other end of the moving bar 117a.

[0052] The current guide piece 117b serves to guide the flow of current flowing through the circular incision tool 111. That is, the current guide piece 117b guides the flow of current flowing through the circular incision tool 111 to the inside of the circular incision tool 111, thereby enabling the capsular incision part 110 to easily incise the lens capsule 50 in a circular shape.

[0053] FIG. 6 is a block diagram of a capsulotomy device according to an embodiment of the present invention, and FIG. 7 is a graph used to explain the measurement unit shown in FIG.

[0054] The present invention is applicable to the capsulotomy device shown in the above-mentioned Figures 1 to 5, and the capsulotomy device according to an embodiment of the present invention can include a measurement unit 200, a state determination unit 210, and a power application unit 220.

[0055] The measuring section 200 measures the impedance of intraocular tissue (for example, the lens capsule) when the capsulorhexis section 110 is in contact with the intraocular tissue.

[0056] In other words, the measuring unit 200 is intended to measure the impedance of intraocular tissue (e.g., the lens capsule) before incising the lens capsule 50, and applies a predetermined test current to the electrodes of the capsule incision opening 110 that are in contact with the intraocular tissue (e.g., the lens capsule) approximately every 100 ms, reads out the voltage value corresponding to the test current flowing through the electrodes for each application, and can measure the impedance of the intraocular tissue (e.g., the lens capsule) in the current contact state.

[0057] Here, the electrodes of the capsular incision portion 110 may refer to the first wire (active electrode) and the second wire (return electrode) included in the circular incision tool 111. The test current should be understood to be a current that is lower than the current or high-frequency power for incising the capsular bag 50 and that is sufficient to measure impedance.

[0058] The measuring unit 200 can measure impedance for approximately seven different contact states, as shown in FIG. 7, depending on the contact state of the electrode of the capsular incision opening 110 in contact with intraocular tissue (e.g., the lens capsule).

[0059] For example, before the electrodes are inserted into the lens capsule 50 from outside the eyeball, the measuring unit 200 can measure a first impedance that exhibits a change as shown in part A of FIG. 7. Furthermore, when the electrodes are inserted into the lens capsule 50 from outside the eyeball, the measuring unit 200 can measure a second impedance that exhibits a change as shown in part B of FIG. 7. Furthermore, when the electrodes are in normal contact with the lens capsule 50 and maintained in normal contact, the measuring unit 200 can measure a third impedance that exhibits a change as shown in part C of FIG. 7. Furthermore, when output through the electrodes begins in the lens capsule 50, the measuring unit 200 can measure a fourth impedance that exhibits a change as shown in part D of FIG. 7. Furthermore, when the lens capsule 50 is incised and the electrodes are in contact and maintained in normal contact, the measuring unit 200 can measure a fifth impedance that exhibits a change as shown in part E of FIG. 7. Then, in a state where the electrodes in the lens capsule 50 are removed from inside the eyeball to outside the eyeball, the measuring unit 200 can measure a sixth impedance that shows a change like that shown in part F of Fig. 7. Furthermore, in a state where the electrodes in the lens capsule 50 are removed to outside the eyeball, the measuring unit 200 can measure a seventh impedance that shows a change like that shown in part G of Fig. 7.

[0060] In the above description, seven contact states of the electrodes of the capsular incision 110 are exemplified, but the number is not limited to these.

[0061] The state determination unit 210 pre-stores information on impedance that can be a standard value (or reference value) depending on the contact state of the electrodes of the capsulorhexis unit 110 in contact with intraocular tissue (e.g., the lens capsule 50). For example, the pre-stored information on impedance depending on the contact state of the electrodes may include at least one selected from the amount of change in impedance, the average value of impedance, the variance of impedance, a value obtained by analyzing the amount of change in impedance through convolution, and a value calculated by mathematical calculation.

[0062] For example, the state determination unit 210 pre-stores information on impedance as a standard value for the state before the electrode in the lens capsule is inserted into the eyeball from outside, information on impedance as a standard value for the state when the electrode is inserted into the lens capsule from outside, information on impedance as a standard value for the state when the electrode is in normal contact with the lens capsule and maintained, information on impedance as a standard value for the state when output to the lens capsule through the electrode has begun, information on impedance as a standard value for the state when the electrode is in contact and maintained when the lens capsule is incised, information on impedance as a standard value for the state when the electrode is in contact and maintained when the electrode in the lens capsule is removed from inside to outside the eyeball, and information on impedance as a standard value for the state when the electrode in the lens capsule has been removed to outside the eyeball.

[0063] The state determining section 210 can determine the current contact state of the electrodes in contact with the lens capsule 50 based on the impedance measured by the measuring section 200 .

[0064] In other words, when the state determination unit 210 receives impedance from the measurement unit 200, it compares the impedance with previously stored information on the impedance for each electrode contact state to search for matching information, thereby determining the current contact state of the electrode in contact with the lens capsule 50. Here, matching may mean not only something that is numerically or pattern-wise (morphologically) identical, but also something that is nearly close.

[0065] If necessary, in order to further improve the accuracy of the signal analysis, the state determination unit 210 may further include an amplifier (not shown) that can amplify the impedance from the measurement unit 200. In this way, when the state determination unit 210 further includes an amplifier, the current contact state of the electrode in contact with the lens capsule 50 can be more easily and accurately determined based on the impedance amplified by the amplifier.

[0066] The power supply unit 220 adjusts the current or high frequency power to be applied to the capsulotomy unit 100 according to the contact state determined by the state determination unit 210 .

[0067] That is, when the electrodes are in normal contact with the lens capsule and maintained, the power supply unit 220 stores adjustment values ​​for the current or high-frequency power to be applied to the lens capsule incision unit 100 based on a preset value of current or high-frequency power to be applied to the lens capsule incision unit 100 for other states (i.e., the state before the electrodes are inserted into the lens capsule from outside the eyeball, the state after the electrodes are inserted into the lens capsule from outside the eyeball, the state after output has begun through the electrodes to the lens capsule, the state after the lens capsule is incised and the electrodes are maintained in contact, the state after the electrodes on the lens are removed from inside the eyeball to outside the eyeball, and the state after the electrodes in the lens capsule have been removed to outside the eyeball).

[0068] Therefore, the power supply application unit 220 can apply differential power (i.e., adaptively optimized power) for incising the capsular bag to the capsular bag incision unit 100 depending on the current contact state of the electrodes in contact with the capsular bag 50.

[0069] For example, if the state determination unit 210 determines that the electrodes are in normal contact with the lens capsule 50 and are maintained in that state, the power supply unit 220 can apply a preset value of current or high-frequency power to the lens capsule incision unit 100.

[0070] Furthermore, if the state determination unit 210 determines that the electrode is not in normal contact with the lens capsule 50, that the electrode is inserted from outside the eyeball into the eyeball, or that the electrode has been removed from inside the eyeball to outside the eyeball, the power application unit 220 can prevent output from being applied to the lens capsule incision unit 100 even if the user issues an output instruction.

[0071] Furthermore, if the state determination unit 210 determines that output has begun to the lens 50 through the electrodes, it confirms that the electrodes are in contact and maintained with the lens capsule 50 incised, and if it determines that the incision is not complete, it can further apply to the lens capsule incision unit 100 a current or high-frequency power with a value that is preset to 20% to 50% of the initial output.

[0072] When the electrodes are in normal contact with the lens capsule 50 as exemplified above and maintained, the value of the applied current or high-frequency power for incising the lens capsule is assumed to be a basic value (or reference value). In other states, the applied current or high-frequency power may be a current or high-frequency power that is increased or decreased by a predetermined value from the basic value.

[0073] In the above description, the power supply unit 220 adjusts and applies the current or high frequency power to the capsulotomy unit 100 in accordance with the contact state determined by the state determination unit 210. Alternatively, instead of adjusting and applying the current or high frequency power based on an adjustment value, the current or high frequency power to be applied to the capsulotomy unit 100 for each contact state may be preset, and the current or high frequency power corresponding to the determined contact state may be applied to the capsulotomy unit 100.

[0074] It should be understood that different currents or high-frequency powers are applied to the capsular incision 100 in the following states: the state before the electrodes are inserted into the lens capsule 50 from outside the eyeball; the state in which the electrodes are inserted into the lens capsule 50 from outside the eyeball; the state in which the electrodes are in normal contact with the lens capsule 50 and maintained; the state in which output has begun through the electrodes to the lens capsule 50; the state in which the lens capsule 50 is incised and the electrodes are in contact and maintained; the state in which the electrodes in the lens capsule 50 are removed from inside the eyeball to outside the eyeball; and the state in which the electrodes in the lens capsule 50 are removed to outside the eyeball.

[0075] As a result, the capsular incision section 110 can heat the moisture in the capsular bag 50 within a short period of time using heat or plasma generated by the applied current or high-frequency power, depending on the contact state between the electrode of the capsular incision section 110 and the capsular bag 50, thereby quickly and accurately incising the capsular bag 50 in a circular shape.

[0076] If a current or high-frequency power corresponding to a state in which the electrodes are in normal contact with the lens capsule 50 is applied to the capsulorhexis 110 even when the electrodes are not in normal contact with the lens capsule 50, the incision of the lens capsule 50 may be performed somewhat slowly or inaccurately. To solve this problem, in an embodiment of the present invention, a differential power is applied to the capsulorhexis 110 depending on the state of contact between the electrodes of the capsulorhexis 110 and the lens capsule 50.

[0077] In the above-described embodiment of the present invention, a differential power supply is applied to the capsulotomy unit 110 depending on the state of contact between the electrode of the capsulotomy unit 110 and the capsule 50. However, alternatively, power supply for capsulotomy may not be applied until the state of contact between the electrode of the capsulotomy opening 110 and the capsule 50 is such that the electrode is in normal contact with the capsule 50 and is maintained in that state. Once the electrode is in normal contact with the capsule 50 and is maintained in that state, power supply for incising the capsule may be applied to the capsulotomy unit 110.

[0078] Although the present invention has been described above as being applied to the capsulotomy device shown in Figures 2 to 5, it can also be applied to other types of capsulotomy devices that can incise the capsulum by applying current or high-frequency power.

[0079] FIG. 8 is a flowchart illustrating the operation of the capsulotomy device according to the embodiment of the present invention.

[0080] First, before incising the lens capsule 50, the measurement unit 200 measures the impedance of the intraocular tissue with the capsulorhexis opening 110 in contact with the inside of the intraocular tissue (e.g., the lens capsule) (S200, S210). For example, after the surgeon forms an incision site 22 in the cornea 20 or the sclera 10 using an incision tool, the surgeon inserts one end of the guide unit 122 into the incision site. After inserting the guide unit 122, the surgeon operates the button unit 130, and the capsulorhexis portion 110 is exposed to the outside of the main body unit 120 and positioned above the lens capsule 50 to be incised. In this way, the electrodes (first wire, second wire) of the capsulorhexis portion 110 come into contact with the upper surface of the lens capsule 50. As a result, a predetermined test current is applied approximately every 100 ms to the electrodes of the capsular incision opening 110 in contact with the lens capsule 50, and a voltage value corresponding to the test current flowing through the electrodes for each application is read to measure the impedance of the intraocular tissue (e.g., the lens capsule) in the current contact state. For example, the measuring unit 200 can measure impedance for approximately seven contact states depending on the contact state of the electrodes of the capsular incision opening 110 in contact with the intraocular tissue (e.g., the lens capsule).

[0081] Next, the state determination unit 210 determines the current contact state of the electrodes in contact with the lens capsule 50 based on the impedance measured by the measurement unit 200 (S220). That is, when the state determination unit 210 receives the impedance from the measurement unit 200, it compares it with previously stored information on the impedance for each contact state of the electrodes to search for matching information, thereby determining the current contact state of the electrodes in contact with the lens capsule 50. Here, the previously stored information on the impedance for each contact state of the electrodes may include at least one selected from the group consisting of an amount of change in impedance, an average value of the impedance, a variance of the impedance, a value obtained by analyzing the amount of change in impedance by convolution, and a value calculated by a mathematical operation.

[0082] Thereafter, the power supply unit 220 adjusts and applies the current or high-frequency power to the capsulotomy unit 100 according to the contact state determined by the state determination unit 210 (S230). That is, the power supply unit 220 applies a differential power (i.e., an adaptively optimized power) for incising the capsulotomy unit 100 according to the current contact state of the electrodes in contact with the capsulotomy unit 50.

[0083] As a result, the capsular incision unit 110 heats the moisture in the capsular bag 50 in a short period of time using heat or plasma generated by the applied current or high-frequency power depending on the contact state between the electrode of the capsular incision unit 110 and the capsular bag 50, thereby quickly and accurately incising the capsular bag 50 in a circular shape (S240).

[0084] As described above, the drawings and the specification disclose the best mode for carrying out the present invention. Although specific terms are used herein, they are used merely for the purpose of describing the present invention and are not used to limit the meaning or the scope of the present invention as described in the claims. Therefore, a person skilled in the art would understand that various modifications and equivalent embodiments are possible. Therefore, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims. [Industrial Applicability]

[0085] The capsulotomy device of the present invention can be utilized to quickly and accurately make a circular incision in the capsular bag. [Explanation of symbols]

[0086] 100 Capsulotomy device 110 Capsular incision 101 Metal wire 111 Circular incision tool 112 First Wire 113 Second Wire 114 Insulated Wire 115 Moving parts 117 Current-inducing members 117a Moving bar 117b Current induction piece 118 First button section 120 Main body 122 Guide part 122a Moving hole 124 Body 130 Button section 200 Measuring section 210 Status determination unit 220 Power supply unit

Claims

1. A capsulorhexis device for incising a capsulotomy capsule and having a capsulorhexis portion equipped with an electrode, a measuring unit capable of measuring impedance having a value that differs depending on whether or not the capsular incision is in contact with the lens capsule and the state of the contact; a state determination unit that determines a current contact state of the electrode that is in contact with the lens capsule based on the impedance measured by the measurement unit; a power supply applying unit that applies a current to the capsulotomy unit in order to incise the capsulotomy unit, the current being adjusted depending on the contact state determined by the state determining unit; Including, a third impedance in a state in which the electrodes are in normal contact and maintained; a fourth impedance in a state in which output to the lens capsule through the electrodes has begun; a fifth impedance in a state in which the electrodes are in contact and maintained after the capsulotomy has been performed; a sixth impedance in a state in which the electrodes in the lens capsule have been removed from inside the eyeball to outside the eyeball; and a seventh impedance in a state in which the electrodes in the lens capsule have been removed to outside the eyeball.

2. The state determination unit 2. The capsulotomy device of claim 1, wherein when the impedance is input from the measurement unit, the current contact state of the electrode in contact with the capsular bag is determined by comparing the impedance with previously stored information on the impedance for each electrode contact state and searching for matching information.

3. The stored information on impedance according to the contact state of the electrodes is The capsulotomy device according to claim 2, wherein the value includes at least one selected from the group consisting of an amount of change in impedance, an average value of impedance, a variance of impedance, a value obtained by analyzing the amount of change in impedance by convolution, and a value calculated by mathematical calculation.

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