Capsulotomy device

Abstract

A lens capsule incision device is proposed which applies a power source for cutting a lens capsule to a lens capsule incision portion in stages according to the contact state of the lens capsule and the electrode. The proposed device is a lens capsule incision device including a lens capsule incision portion for cutting a lens capsule surrounding a lens, and includes: a measurement portion which measures the impedance when the electrode of the lens capsule incision portion is in contact with the lens capsule; a state determination portion which determines the current contact state of the electrode in contact with the lens capsule based on the impedance measured in the measurement portion; and a power source application portion which applies a power source for cutting the lens capsule to the lens capsule incision portion in stages according to the contact state determined in the state determination portion.

Description

Technical Field

[0001] This invention relates to a lens capsule incision device, and more specifically to a lens capsule incision device capable of cutting open the anterior part of the lens capsule surrounding the lens of the eyeball. Background Technology

[0002] The eye (eyeball), which makes up the body, is an organ that senses the intensity and wavelength of light to ensure visual field. It includes the cornea, colorless and transparent lens, iris, and retina. The cornea surrounds the sclera and is formed by transparent, avascular tissue, which refracts light. The colorless and transparent lens acts like a lens in a camera. The iris contains pigment, which determines the color of the pupil and acts as an aperture to regulate the amount of light entering the eye. The retina is like the film in a camera and is formed by transparent nerve tissue.

[0003] As mentioned above, the lens that makes up the eye is equivalent to the lens of a camera. Just as the clarity of a photograph decreases when the lens becomes dirty, if the lens becomes cloudy, light cannot pass through the eye smoothly, thus causing blurred vision. This clouding of the lens due to various reasons is called cataract.

[0004] In such cases, if cataracts develop, rapid treatment is necessary to prevent vision loss or blindness. Among the commonly used methods for treating cataracts, the following involves cutting open the lens capsule surrounding the lens, using ultrasound to pulverize the lens within it, then using ultrasound to remove the pulverized lens, and finally inserting an artificial lens to replace it. Specifically, this involves using a diamond scalpel or similar tool to make an incision of approximately 2mm to 3mm in width in the sclera or cornea. A cutting tool with a bent needle is inserted through this incision to scrape away the front of the lens capsule, removing it in a predetermined shape. Ultrasound is then used to pulverize the exposed lens, and the pulverized lens is aspirated and drained to the outside. An artificial lens is then inserted and fixed in place of this fragmented lens.

[0005] This incision of the lens capsule is a crucial procedure related to the safety of cataract surgery. The surgeon meticulously incises the cornea, inserts an incision instrument through the fine incision, and repeatedly scrapes away the front of the lens capsule to expose the lens. For this meticulous corneal incision, the incision should be as small as possible to ensure postoperative recovery and visual stability; an incision instrument that requires excessive cutting is unusable in actual surgery. Furthermore, using such an incision instrument requires the surgeon to move the instrument very carefully and repeatedly to cut the front of the lens capsule, making the procedure cumbersome and time-consuming. Therefore, it is difficult to make a clean and precise incision of the appropriate size and shape when using an incision instrument; when the lens capsule cannot be cut to the appropriate size and shape, radial tears can occur.

[0006] Therefore, there is a need to develop a device that can quickly and accurately cut the lens capsule into a circular shape. Summary of the Invention

[0007] Technical issues

[0008] The present invention addresses the problems of the prior art as described above, and aims to provide a lens capsule cutting device that applies power to the lens capsule cutting portion in stages according to the contact state between the lens capsule and the electrode.

[0009] Technical solution

[0010] To achieve the above objectives, the present invention provides a lens capsule cutting device that applies power to the lens capsule cutting portion in stages according to the contact state between the lens capsule and the electrode.

[0011] Beneficial effects

[0012] According to the lens capsule cutting device of the present invention, the power supply for cutting the lens capsule can be applied in stages to the lens capsule cutting section according to the contact state between the lens capsule and the electrode. Therefore, the lens capsule cutting section can quickly and accurately cut the lens capsule into a circle using the heat or plasma generated by the current or high-frequency power applied according to the contact state between the electrode and the lens capsule. Attached Figure Description

[0013] Figure 1 A diagram to briefly represent the human eyeball.

[0014] Figure 2 The diagram is for illustrative purposes of the lens capsule cutting device to which the present invention is applicable.

[0015] Figure 3a For example Figure 2 An enlarged view of the lens capsule incision section of the lens capsule incision device shown.

[0016] Figure 3b For example Figure 2 An enlarged view of the lens capsule incision section of the lens capsule incision device shown.

[0017] Figure 4 To indicate as Figure 2 The diagram shows the state in which the lens capsule incision is inserted into the guide portion.

[0018] Figure 5 For the purpose of illustration, such as Figure 2 A diagram showing a deformed example of the lens capsule incision.

[0019] Figure 6 This is a frame structure diagram of a lens capsule cutting device according to an embodiment of the present invention.

[0020] Figure 7 For example Figure 6 The graph used in the description of the measuring section shown.

[0021] Figure 8 This is a flowchart illustrating the operation of a lens capsule cutting device according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures

[0023] 100: Lens Capsule Cutting Device

[0024] 110: Lens capsule incision site

[0025] 101: Metallic Lines

[0026] 111: Circular cut piece

[0027] 112: First metal wire

[0028] 113: Second metal wire

[0029] 114: Coated metal wire

[0030] 115: Moving parts

[0031] 117: Current sensing component

[0032] 117a: Moving rod

[0033] 117b: Current sensing element

[0034] 118: First button section

[0035] 120: Ontology Department

[0036] 122: Guiding Section

[0037] 122a: Moving hole

[0038] 124: Main Body

[0039] 130: Button section

[0040] 200: Measurement Department

[0041] 210: State Determination Department

[0042] 220: Power application section

[0043] Best practice

[0044] One embodiment of the present invention relates to a lens capsule cutting apparatus including a lens capsule cutting portion for cutting open the lens capsule surrounding the lens, comprising: a measuring unit for measuring the impedance of the electrodes of the lens capsule cutting portion in contact with the lens capsule; a state determining unit for determining the current contact state of the electrodes in contact with the lens capsule based on the impedance measured in the measuring unit; and a power supply applying unit for applying a graded power supply for cutting open the lens capsule to the lens capsule cutting portion according to the contact state determined in the state determining unit. Detailed Implementation

[0045] This invention can be modified in many ways and can have many embodiments. Specific embodiments are illustrated and described in detail in the accompanying drawings.

[0046] However, this does not mean that the present invention is limited to a specific implementation. It should be understood that all changes, equivalent technical solutions or alternative technical solutions are included within the scope of the ideas and technology of the present invention.

[0047] The terminology used in this application is for illustrative purposes only and is not intended to limit the invention. The singular includes the plural unless clearly distinguished in the context. It should be understood in this application that terms such as "comprising" or "having" are used to specify the presence of features, numbers, steps, functions, structural elements, components, or combinations thereof described in the specification, and do not preclude the presence or additional possibilities of one or more other features, numbers, steps, functions, structural elements, components, or combinations thereof.

[0048] Unless otherwise defined, all terms used herein, including technical or scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms as defined in commonly used dictionaries shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and shall not be interpreted in an ideal or excessive manner unless explicitly defined in this application.

[0049] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In the description of the present invention, for the purpose of aiding overall understanding, the same reference numerals are used for the same structural elements in the drawings, and repeated descriptions of the same structural elements are omitted.

[0050] Figure 2 The diagram is provided for a simplified illustration of the lens capsule cutting device to which this invention is applicable. Figure 3a and Figure 3b For example Figure 2 The top view of the lens capsule incision device shown. Figure 4 To indicate as Figure 2 The diagram shows the lens capsule incision inserted into the guide portion. Figure 5For the purpose of illustration, such as Figure 2 A diagram showing a deformed example of the lens capsule incision.

[0051] Referring to the accompanying drawings, the lens capsule cutting device 100 applicable to this invention is inserted into the cutting site 22 of the cornea 20 or the cutting site of the sclera 10 (not shown), and can cut a portion of the lens capsule 50 surrounding the lens 30 into a circle.

[0052] The lens capsule cutting device 100 to which this invention is applicable includes a lens capsule cutting part 110, a body part 120, and a button part 130.

[0053] The lens capsule incision portion 110 has a closed curve shape and is inserted into the incision portion 22 of the cornea 20 or the incision portion of the sclera 10 (illustration omitted), which can cut the lens capsule 50 into a circle.

[0054] That is, the lens capsule incision portion 110 utilizes the power application portion (as described later) Figure 6 The heat or plasma generated by the specified current or high-frequency power applied to cut the lens capsule (as shown) heats the moisture in the lens capsule 50 that is in contact with the lens capsule cutting portion 110 in a short time, and can cut the lens capsule 50 into a circle.

[0055] Reference Figure 3a The circular ring-shaped lens capsule cutout 110 is formed by a steel wire rope made of multiple metal lines 101 or metal wire ropes twisted together. The steel wire rope adopts a structure of multiple twisted wire ropes, or, as an example, a structure in which multiple wire ropes are twisted on the outside of a rope core located at the center.

[0056] According to embodiments of the present invention, although the 1×7 structure of the steel wire rope forms a loop-shaped electrode, other structures of steel wire rope can also be used. On the other hand, each wire rope can be a structure of single or multiple layers of twisted lines of the same or other diameters, but it can also be formed from a single metal wire.

[0057] Compared to metal wires formed by twisting multiple conductive metal wires, steel wire ropes with this structure have superior elasticity and resilience. The steel wire rope electrode section with the nozzle-shaped insertion part has excellent resilience.

[0058] The insulating coating layer (not shown) applied to the periphery of the lens capsule incision 110 preferably has a color that contrasts with the color of the eyeball.

[0059] Reference Figure 3b The lens capsule incision 110 may include a circular incision member 111, a moving member 115, and a current application member (not shown).

[0060] The circular cutting element 111 may include a first metal wire 112, a second metal wire 113, and may also include a coated metal wire 114.

[0061] The circular cutting tool 111 cuts the lens capsule 50 into a circle.

[0062] The movable part 115 is connected at one end to the circular cutter 111, and moves the circular cutter 111 by means of the operation of the button part 130 described later.

[0063] The first metal wire 112 can be used as an active electrode, and the second metal wire 113 can be used as a reflux electrode.

[0064] As an example, when current is applied to the lens capsule incision 110, if the current is applied to the first metal wire 112 through the current application member (not shown), the current applied to the first metal wire 112 flows to the second metal wire 113, which serves as the return electrode.

[0065] As an example, such as Figure 3a As shown, a circular cut piece is formed by only a circular metal wire serving as the active electrode. When a large electrode (not shown) is placed on the patient's thigh or arm, separated from the metal wire, the current applied through the metal wire is applied to the large electrode (not shown) through the body. Since the resistance of each patient's body is different, the power varies.

[0066] To resolve this problem, such as Figure 3b As shown, a coated metal wire 114 is placed in the middle, and a first metal wire 112 and a second metal wire 113 are located on both sides to form a circular cut-out part 111. The coated metal wire 114 can maintain a constant resistance value between the two electrodes 112 and 113, thereby reducing power fluctuations.

[0067] The insulating coating layer (not shown) applied around the coated metal wire 114 preferably has a color that contrasts with the color of the eyeball. This is to allow the surgeon to easily determine whether the circular incision piece 111 inserted into the incision site 22 of the cornea 20 is correctly positioned at the anterior center of the lens capsule 50.

[0068] Preferably, the circular cut piece 111 is made of a first metal wire 112, a second metal wire 113 and a coated metal wire 114 twisted into a rope shape to further increase the elasticity. The first metal wire 112 and the second metal wire 113 are made of metal materials with elasticity.

[0069] The lens capsule incision portion 110 slides and moves inside the body portion 120, and when incising the lens capsule 50, as... Figure 3b As shown, the lens body 120 is exposed to the outside without cutting the lens capsule 50, as... Figure 4 As shown, it is inserted inside the body part 120.

[0070] The main body 120 includes a guide section 122 and a main body 124.

[0071] The guide portion 122 causes the lens capsule incision portion 110 to slide inside and guides the lens capsule incision portion 110 through the incision portion 22 of the cornea 20.

[0072] The guide portion 122 is made of silicone material, and a moving hole 122a is formed in the center of the guide portion 122 for the lens capsule cutting portion 110 to slide and move.

[0073] Because a movable hole 122a is formed in the guide portion 122, the lens capsule cutting portion 110 can slide and move inside the movable hole 122a. In this case, when the lens capsule 50 is cut, the lens capsule cutting portion 110 is exposed from the inside of the movable hole 122a to the outside, and when the lens capsule 50 is not cut, the lens capsule cutting portion 110 remains inserted inside the movable hole 122a.

[0074] Although it is described that the guide part 122 is made of silicone, it is not limited to this and may be made of other materials other than silicone.

[0075] Preferably, one end of the guide portion 122 is connected to the main body 124, and the moving part 115 of the lens capsule cutting portion 110 slides inside the main body 124, and a moving hole (not shown) is formed inside the main body 124 for the sliding movement of the moving part 115.

[0076] Preferably, the guide portion 122 connected to the main body 124 is obliquely connected to the main body 124, and preferably, one end of the moving part 115 connected to the circular cutter 111 is formed obliquely.

[0077] The main body 124 and the guide portion 122 are connected at an angle, and the moving part 115 is formed at an angle, making it easy for the operator to perform the following operations: after inserting the guide portion 122 into the incision site 22 of the cornea 20 or the incision site of the sclera 10 (not shown), the lens capsule 50 is cut into a circle using the circular cutting piece 111.

[0078] A button portion 130 is formed on one side of the main body portion 120, which allows the lens capsule incision portion 110 to slide and move inside the main body portion 120. The lens capsule incision portion 110, which is slid and moved by the operator operating the button portion 130, is exposed inside the main body portion 120, and the lens capsule 50 is cut into a circle or inserted into the interior of the main body portion 120.

[0079] On the other hand, such as Figure 5 As shown, the lens capsule incision portion 110 may also include a current sensing element 117. Furthermore, as... Figure 5As shown, the main body 120 may also include a first button 118.

[0080] The current sensing component 117 slides and moves, either inserted into the interior of the body 120 or exposed to the outside.

[0081] When the current sensing component 117 is exposed outside the body portion 120, it is located at the center of the circular cut-out member 111 and serves to induce current to flow to the center of the circular cut-out member 111.

[0082] The current sensing component 117 may include a moving rod 117a and a current sensing plate 117b.

[0083] The current sensing component 117 slides by means of the operation of the first button portion 118, which is formed on one side of the body portion 120 apart from the button portion 130, and is inserted into the interior of the body portion 120 or exposed to the outside.

[0084] One end of the moving rod 117a is connected to one end of the first button part 118, and the other end moves toward the center of the circular cutter 111 by means of the operation of the first button part 118.

[0085] The current sensing element 117b is integrally mounted on the other end of the moving rod 117a.

[0086] The current sensing element 117b serves to induce current flow to the circular cutter 111. That is, the current sensing element 117b induces the flow of current to the circular cutter 111 to the inside of the circular cutter 111, thereby allowing the lens capsule cutting portion 110 to easily cut the lens capsule 50 into a circle.

[0087] Figure 6 This is a frame structure diagram of a lens capsule incision device according to an embodiment of the present invention. Figure 7 For example Figure 6 The graph used in the description of the measuring section shown.

[0088] This invention is applicable to the above-described Figures 1 to 5 The lens capsule cutting device shown, according to an embodiment of the present invention, may include a measuring unit 200, a state determining unit 210, and a power application unit 220.

[0089] The measuring unit 200 measures the impedance of the intraocular tissue when the lens capsule incision 110 is in contact with intraocular tissue (e.g., lens capsule).

[0090] In other words, the measuring unit 200 is used to measure the impedance of intraocular tissue (e.g., lens capsule) before cutting the lens capsule 50. Approximately every 100 ms, a predetermined test current is applied to the electrodes of the lens capsule cutting section 110 that is in contact with the intraocular tissue (e.g., lens capsule), and the voltage value corresponding to the test current flowing through the applied electrodes is read. The impedance of the intraocular tissue (e.g., lens capsule) in the current contact state can be measured.

[0091] The electrodes of the lens capsule incision 110 can refer to the first metal wire (active electrode) and the second metal wire (reflux electrode) included in the circular incision piece 111. Furthermore, the test current is the current used to incise the lens capsule 50 or a current with power below high frequency, which can be understood as a current capable of measuring impedance.

[0092] The measuring unit 200 measures the contact state of the electrodes of the lens capsule incision 110, which are in contact with intraocular tissues (e.g., the lens capsule), such as... Figure 7 As shown, approximately seven different contact state impedances can be measured.

[0093] For example, in the lens capsule 50, before the electrode is inserted into the eyeball from outside, the measuring unit 200 can measure the appearance of... Figure 7 The first impedance of the change in part A. Furthermore, with the electrode inserted into the eyeball from outside the eyeball in the lens capsule 50, the measuring unit 200 can measure the impedance exhibiting as shown in the figure. Figure 7 The second impedance changes in part B. Furthermore, while maintaining normal contact between the electrode and the lens capsule 50, the measuring unit 200 can measure the impedance exhibiting as shown in... Figure 7 The third impedance changes in part C. Furthermore, when power is output through the electrodes within the lens capsule 50, the measuring unit 200 can measure the impedance exhibiting as shown... Figure 7 The fourth impedance changes in part D. Furthermore, with the lens capsule 50 cut open and in contact with the electrode, the measuring unit 200 can measure the impedance exhibiting as shown... Figure 7 The fifth impedance is the change in part E. Furthermore, with the electrode in the lens capsule 50 removed from inside the eyeball to outside, the measuring unit 200 can measure the impedance exhibiting as shown... Figure 7 The sixth impedance of the F part changes. Furthermore, with the electrode in the lens capsule 50 cut out outside the eyeball, the measuring unit 200 can measure the impedance exhibiting as shown... Figure 7 The seventh impedance changes in the G part.

[0094] In the above description, although seven contact states of the electrodes of the lens capsule incision 110 are illustrated, they are not limited to these.

[0095] The state determination unit 210 pre-stores impedance information that can serve as a standard value (or reference value) according to different contact states of the electrodes of the lens capsule incision 110 that are in contact with intraocular tissues (e.g., lens capsule 50). For example, the pre-stored impedance information for different contact states of the electrodes may include any one or more of the following: impedance variation, impedance average, impedance dispersion, values ​​obtained by convolution analysis of impedance variation, and values ​​calculated through mathematical operations.

[0096] For example, the state determination unit 210 pre-stores the standard value (i.e., impedance) of the state before the lens capsule electrode is inserted from outside the eyeball into the eyeball, the standard value (i.e., impedance) of the state when the lens capsule electrode is inserted from outside the eyeball into the eyeball, the standard value (i.e., impedance) of the state when the electrode is in normal contact with the lens capsule, the standard value (i.e., impedance) of the state when power is output to the lens capsule through the electrode, the standard value (i.e., impedance) of the state when the lens capsule is cut open and the electrode is in contact with it, the standard value (i.e., impedance) of the state when the lens capsule electrode is removed from inside the eyeball to outside the eyeball and the electrode is in contact with it, and the standard value (i.e., impedance) of the state when the lens capsule electrode is removed to outside the eyeball.

[0097] Based on the impedance measured in the measuring unit 200, the state determination unit 210 can determine the current contact state of the electrode that is in contact with the lens capsule 50.

[0098] In other words, if the state determination unit 210 receives impedance from the measurement unit 200, it compares it with the stored information on impedances of different contact states of the electrode to retrieve matching information, thereby determining the current contact state of the electrode in contact with the lens capsule 50. Matching can mean not only identical values ​​or patterns (morphologies), but also nearly identical values.

[0099] As needed, the state determination unit 210 may also include an amplifier (not shown) that amplifies the impedance from the measurement unit 200 in order to further improve the accuracy of signal analysis. As described above, when the state determination unit 210 also includes an amplifier, the current contact state of the electrode in contact with the lens capsule 50 can be determined more easily and accurately based on the impedance amplified in the amplifier.

[0100] The power application unit 220 applies the current or high-frequency power to the lens capsule cutting part 110 according to the contact state determined by the state determination unit 210.

[0101] That is, the power application unit 220, while maintaining normal contact between the electrode and the lens capsule, uses the preset value of current or high-frequency power applied to the lens capsule cutting section 110 as a reference, and stores the adjustment value of the current or high-frequency power applied to the lens capsule cutting section 110 according to other different states (i.e., the state before the electrode in the lens capsule is inserted from outside the eyeball into the eyeball, the state after the electrode in the lens capsule is inserted from outside the eyeball into the eyeball, the state of outputting power to the lens capsule through the electrode, the state of maintaining contact with the electrode while the lens capsule is cut, the state after the electrode in the lens capsule is cut from inside the eyeball to outside the eyeball, and the state after the electrode in the lens capsule is cut to outside the eyeball).

[0102] Therefore, the power application unit 220 can apply a graded power supply (i.e., the most adaptable power supply) to the lens capsule cutting section 110 for cutting the lens capsule according to the current contact state of the electrode in contact with the lens capsule 50.

[0103] For example, when the state determination unit 210 determines that the electrode is in normal contact with the lens capsule 50 and is maintained in this state, the power application unit 220 can apply a preset value of current or high-frequency power to the lens capsule cutting part 110.

[0104] Furthermore, when the state determination unit 210 determines that the electrode cannot make normal contact with the lens capsule 50, the electrode is inserted into the eyeball from outside the eyeball, or the electrode is cut out from inside the eyeball to outside the eyeball, the power application unit 220 can not apply power to the lens capsule incision section 110 even if the user issues a power application instruction.

[0105] Furthermore, when the state determination unit 210 determines that the state is to output power to the lens capsule 50 through the electrode, it confirms that the lens capsule 50 is in contact with the electrode while being cut. If it is confirmed that the cut is incomplete, a current or high-frequency power equivalent to 20% to 50% of the initial power can be additionally applied to the lens capsule cutting section 110.

[0106] Assuming that the electrode is in normal contact with the lens capsule 50 as illustrated above, the value of the current or high-frequency power applied to cut the lens capsule is a basic value (or may be called a reference value). In other states, the current or high-frequency power applied may be the basic value minus a specified value.

[0107] As described above, the power application unit 220 applies power by adjusting the current or high-frequency power applied to the lens capsule incision section 110 according to the contact state determined by the state determination unit 210. In contrast, instead of applying power by adjusting the value, the current or high-frequency power applied to the lens capsule incision section 110 is preset according to each different contact state, and the current or high-frequency power corresponding to the determined contact state can also be applied to the lens capsule incision section 110.

[0108] It should be understood that in the lens capsule 50 illustrated above, different currents or high-frequency power are applied to the lens capsule incision portion 110 according to the following states: before the electrode is inserted into the eyeball from outside the eyeball; in the lens capsule 50, the electrode is inserted into the eyeball from outside the eyeball; in the lens capsule 50, the electrode is cut out from the eyeball to outside the eyeball; and in the lens capsule 50, the electrode is cut out from the eyeball to outside the eyeball.

[0109] Therefore, the lens capsule cutting section 110 uses the current or high-frequency power applied according to the contact state between the electrode of the lens capsule cutting section 110 and the lens capsule 50 to generate heat or plasma, which heats the moisture in the lens capsule 50 in a short time, and can quickly and accurately cut the lens capsule 50 into a circle.

[0110] If, even if the electrode is not in normal contact with the lens capsule 50, the current or high-frequency power corresponding to that state is unconditionally applied to the lens capsule incision portion 110, the lens capsule 50 will be cut slightly slowly or inaccurately. To resolve this problem, in embodiments of the present invention, a graded power supply is applied to the lens capsule incision portion 110 according to the contact state between the electrode and the lens capsule 50.

[0111] In the above-described embodiments of the present invention, although a graded power supply is applied to the lens capsule incision 110 according to the contact state between the electrode of the lens capsule incision 110 and the lens capsule 50, unlike this, no power supply for incising the lens capsule is applied until the contact state between the electrode of the lens capsule incision 110 and the lens capsule 50 reaches a state where the electrode and the lens capsule 50 are in normal contact and maintained. If the state where the electrode and the lens capsule 50 are in normal contact and maintained is reached, the power supply for incising the lens capsule can be applied to the lens capsule incision 110.

[0112] The foregoing describes the applicability of this invention to... Figures 2 to 5This is a lens capsule cutting device, but it can also be applied to other lens capsule cutting devices that can cut open other forms of the lens capsule by applying current or high-frequency power.

[0113] Figure 8 This is a flowchart illustrating the operation of a lens capsule cutting device according to an embodiment of the present invention.

[0114] First, before cutting the lens capsule 50, the measuring unit 200 measures the impedance of the intraocular tissue (S200, S210) when the lens capsule incision portion 110 is in contact with the intraocular tissue (e.g., the lens capsule). For example, after the surgeon uses an incision tool to form an incision site 22 in the cornea 20 or sclera 10, one end of the guide portion 122 is inserted into the incision site. After inserting the guide portion 122, if the surgeon operates the button portion 130, the lens capsule incision portion 110 is exposed outside the body portion 120 and located on the upper part of the lens capsule 50 to be cut. In this way, the electrodes (first metal wire, second metal wire) of the lens capsule incision portion 110 contact the upper surface of the lens capsule 50. Therefore, a predetermined test current is applied to the electrode of the lens capsule incision 110, which is in contact with the lens capsule 50, approximately every 100 ms. The voltage value corresponding to the test current flowing through the electrode each time it is applied is read, and the impedance of the intraocular tissue (e.g., the lens capsule) in the current contact state is measured. For example, the measuring unit 200 can measure approximately seven different contact state impedances based on the contact state of the electrode of the lens capsule incision 110, which is in contact with the intraocular tissue (e.g., the lens capsule).

[0115] Next, the state determination unit 210 determines the current contact state of the electrode in contact with the lens capsule 50 based on the impedance measured in the measurement unit 200 (S220). In other words, if the state determination unit 210 receives impedance from the measurement unit 200, it compares it with the stored information on impedances of different contact states of the electrode and retrieves matching information, thereby determining the current contact state of the electrode in contact with the lens capsule 50. The stored information on impedances of different contact states of the electrode may include any one or more selected from impedance change, impedance average, impedance dispersion, values ​​obtained by convolution analysis of impedance change, and values ​​calculated through mathematical operations.

[0116] Then, the power application unit 220 adjusts the current or high-frequency power applied to the lens capsule cutting section 110 according to the contact state determined by the state determination unit 210 (S230). That is, the power application unit 220 applies a graded power supply (i.e., the most adaptable power supply) for cutting the lens capsule to the lens capsule cutting section 110 according to the current contact state of the electrode in contact with the lens capsule 50.

[0117] Therefore, the lens capsule cutting section 110 uses the current or high-frequency power applied according to the contact state between the electrode of the lens capsule cutting section 110 and the lens capsule 50 to generate heat or plasma, which heats the water in the lens capsule 50 in a short time, and can quickly and accurately cut the lens capsule 50 into a circle (S240).

[0118] As described above, preferred embodiments are disclosed in the accompanying drawings and specification. Specific terminology is used therein, but this is for illustrative purposes only and is not intended to limit the meaning or scope of the invention as set forth in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent embodiments can be implemented therein. Consequently, the true scope of protection of this invention should be determined by the technical concept of the appended claims.

[0119] Industrial availability

[0120] The lens capsule cutting device of the present invention can quickly and accurately cut the lens capsule into a circle.

Claims

1. A lens capsule cutting device, comprising a lens capsule cutting portion having electrodes and cutting open the lens capsule, characterized in that, include: The measuring unit is capable of measuring the impedance values ​​that vary depending on whether the lens capsule incision is in contact with the lens capsule and the state of contact. The state determination unit determines the current contact state of the electrode that is in contact with the lens capsule based on the impedance measured in the measurement unit. as well as The power application section applies a current or power, adjusted according to the contact state determined in the state determination section, to the lens capsule cutting section in order to cut the lens capsule. The impedance is selected from one or more of the following groups: a first impedance before the electrode is inserted from outside the eyeball into the eyeball; a second impedance when the electrode is inserted from outside the eyeball into the eyeball; a third impedance when the electrode is in normal contact and maintained; a fourth impedance when the electrode outputs power to the lens capsule; a fifth impedance when the lens capsule is cut open and the electrode is in contact and maintained; a sixth impedance when the electrode is cut from inside the eyeball to outside the eyeball in the lens capsule; and a seventh impedance when the electrode is cut from outside the eyeball in the lens capsule.

2. The lens capsule incision device according to claim 1, characterized in that, If an impedance is received from the measuring unit, it is compared with the stored information on impedances of different contact states of the electrode to retrieve matching information, and the state determination unit determines the current contact state of the electrode in contact with the lens capsule.

3. The lens capsule incision device according to claim 2, characterized in that, The stored information on the impedance of different contact states of the electrode includes one or more of the following: impedance variation, impedance average, impedance dispersion, values ​​obtained by convolution analysis of impedance variation, and values ​​calculated through mathematical operations.

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