KR102599710B1 - Haptic fixing device of intraocular lens - Google Patents

Abstract

The present invention relates to a haptic fixation device for an artificial lens, and more specifically, to facilitate fixation (re-fixation) of the intrascleral lens in case of malposition (dislocation) of the intrascleral lens after cataract surgery, as well as an intrascleral artificial fixation device for focusing. This relates to a haptic fixation device for an artificial lens that allows correction of the position (and angle) of the lens.
According to the present invention, an elastic sleeve is coupled to the haptic in a form that surrounds the haptic of the artificial lens, and is tightly deformable in response to the external curve of the haptic; The hinge connection with the elastic sleeve allows the angle of the elastic sleeve to be adjusted for correction of the anteroposterior position and orientation angle of the intrascleral intrascleral intraocular lens, while a support link to which a fixing thread is connected to pull the haptic and achieve fixation of the intrascleral intrascleral intraocular lens ; And, in addition to the mutual coupling of the elastic sleeve and the support link, a hinge means for rotation of the elastic sleeve with respect to the support link and stepwise adjustment of the rotation angle.

Description

Haptic fixation device for artificial lens {HAPTIC FIXING DEVICE OF INTRAOCULAR LENS}

The present invention relates to a haptic fixation device for an artificial lens, and more specifically, to facilitate fixation (re-fixation) of the intrascleral lens in case of malposition (dislocation) of the intrascleral lens after cataract surgery, as well as an intrascleral artificial fixation device for focusing. This relates to a haptic fixation device for an artificial lens that allows correction of the position (and angle) of the lens.

A cataract is an ophthalmic disease in which the lens in the eye becomes cloudy and appears foggy. It is known to be the biggest cause of vision loss, and the clouded lens is removed and artificially treated. Symptoms can be recovered through surgery to insert a lens.

Among the surgical methods for artificial lens replacement mentioned above, intraocular lens implantation involves making a small incision in the corneal limbus and performing intraocular phacoemulsification aspiration using ultrasound to remove the clouded lens and then insert an artificial lens. A representative example is intraocular lens implantation, which has the advantage of faster wound healing and faster vision recovery compared to the existing surgical method of removing the lens after making a large incision in the corneal limbus.

However, after the above-mentioned intraocular lens implantation, intraocular lens malposition, that is, intraocular lens dislocation, does not uncommonly occur (0.2-2.8% frequency), and weakening of the intraocular ciliary zonule and shrinkage of the lens capsule are known to be the most common causes. It can cause various side effects such as decreased visual acuity, monocular double vision and glare, hyphema, iritis, secondary glaucoma, corneal insufficiency, cystoid macular edema, or retinal detachment, so surgery to re-fix the artificial lens is necessary.

In particular, depending on the method of inventing the artificial lens, artificial lens lens scleal fixation using an existing artificial lens in the eyeball, or artificial lectures that replace the artificial lens, 人 水 水 水 術 術, Intraocular lens iris fixation can be performed selectively, but in case of weakening/rupture of the lens capsule or weakening/rupture of the ciliary zonules, self-fixation of the artificial lens within the sclera is not possible, so the bridge of the artificial lens (haptic / hereinafter referred to as 'haptic') is not possible. ) is mainly performed by hanging a thread (hereinafter referred to as 'fixer thread') to the sclera or exposing the haptic outside the sclera and fixing it by melting the end.

Meanwhile, Figure 1(a)(b) is a structural diagram of a typical artificial lens. A typical artificial lens 900 includes a lens-shaped optic 910, which replaces the human lens, and the optic 900. It consists of a plurality of haptics 920, each of which is a long leg extending from the circumference in opposite directions.

Here, to briefly explain the aforementioned intrascleral intrascleral intraocular lens 900 using the intrascleral intraocular lens 900, especially the integrated intraocular lens as shown in Figure 1(a), first of all, the intrascleral intrascleral intraocular lens 900 A fixing thread is tied and connected to each haptic 920, the fixing thread is pulled out from the sclera at each symmetrical point, and the tension is adjusted so that the optic 910 is located in the center of the sclera. , the process is completed by cutting each fixing thread to an appropriate length, melting the cut tip, and inserting an inflated bulb into the sclera to fix it.

And, to briefly explain the aforementioned intraocular phakic scleral fixation surgery using the three-body intraocular lens as shown in FIG. 1(b), first expose each haptic 920 to the outside of the sclera, and then remove the ends of the haptics 920. It is fixed by melting it with a heat detector to prevent it from falling in, and then the optic 910 of the artificial lens 900 is placed in the center.

However, as described above, there is a problem in that the surgical time is inevitably delayed due to the operator's meticulousness in tying and connecting the fixing thread to the haptic 920 within the sclera, and due to the nature of tying with thread (fixing thread), the haptic (920) There are limits to expecting uniformity in connection.

In addition, due to the nature of tying and connecting the fixing thread to the haptic 920 as described above, the haptic 920 can be separated only by damaging (cutting) the fixing thread when replacing it with a new artificial lens 900 in the future, so the existing fixing thread can be reused. This cannot be done, and the damaged fixator is not only difficult to remove due to adhesion of the scleral tissue, but has also become a factor that makes replacement of the artificial lens 900 impossible.

Moreover, by using the fixing thread that binds and connects the haptic 920, the front and rear position correction of the artificial lens 900 and its position correction are performed so that the focus of the light ray passing through the optic 910 is accurately focused on the center of the retina. The condition cannot be maintained, and in particular, in the case of integrated intraocular lenses, there are functional limitations that lead to complications such as secondary glaucoma due to iris damage or pigmentation.

In addition, in the method of melting the haptic of a three-body type artificial lens with a heat detector and fixing it in the sclera, it is not easy to separate the haptic for replacement of the artificial lens, and finding the end and removing it inevitably damages the artificial lens. There have been some drawbacks.

In the end, the easy connection between the haptic and the fixed part of the artificial lens lowers the difficulty of the surgery, thereby significantly shortening the surgery time. Not only does it enable replacement with a new artificial lens in the future, but it also allows for the before and after of the intrascleral intraocular lens for focusing. Research and development of haptic fixation devices for functionally differentiated intraocular lenses, such as position correction and maintenance of the position correction state, is urgently needed.

(Document 1) Republic of Korea Patent No. 10-2259590 (registered on May 27, 2021) (Document 2) Republic of Korea Patent Publication No. 10-2010-0004777 (published on January 13, 2010)

The purpose of the present invention is to solve the problems described above, and is provided with an elastic sleeve that surrounds the haptic of the artificial lens and deforms in response to the external curve of the haptic, so that the fixing thread (thread) for fixing the artificial lens is attached to the haptic. The aim is to provide a haptic fixation device for an artificial lens that allows the fixation thread to be easily and quickly connected to the haptic without the cumbersome work of tying it.

Another object of the present invention is to provide a support link that is hinged to the elastic sleeve and a hinge means for stepwise rotation (angle adjustment) of the elastic sleeve, so as to provide a rotational motion relationship of the elastic sleeve based on the support link and the hinge means. It is possible to correct the anteroposterior position and orientation angle of the intrascleral intrascleral intraocular lens by moving the position of the haptic, thereby providing a haptic fixation device for the intraocular lens that enables focusing of the intraocular lens.

In order to achieve the above object, the present invention includes an elastic sleeve that is coupled to the haptic in a form that surrounds the haptic of an artificial crystalline lens and is capable of being closely deformed in response to the external bending of the haptic; The hinge connection with the elastic sleeve allows the angle of the elastic sleeve to be adjusted for correction of the anteroposterior position and orientation angle of the intrascleral intrascleral intraocular lens, while a support link to which a fixing thread is connected to pull the haptic and achieve fixation of the intrascleral intrascleral intraocular lens ; And, in addition to the mutual coupling of the elastic sleeve and the support link, a hinge means for rotation of the elastic sleeve with respect to the support link and stepwise adjustment of the rotation angle.

In addition, the elastic sleeve is composed of a sleeve body that surrounds the haptic of the artificial lens and is coupled to the haptic, and at least one hinge arm that protrudes from the sleeve body and is coupled to the hinge means, and the sleeve body includes, The hollow into which the haptic of the artificial lens is inserted forms a tubular shape penetrating along the longitudinal direction, and is made of an elastic material that is closely deformed in response to the external bending of the haptic when the haptic is inserted through it.

In addition, the support link consists of a support that supports the elastic sleeve while a fixing thread is connected to one side, and a central axis that is integrally formed on the other side of the support, engages the elastic sleeve, and becomes the center of rotation of the elastic sleeve. do.

In addition, the hinge means is formed on a first gear formed on the inner surface of the hinge arm and on the longitudinal outer surface of the central axis facing the hinge arm and engages with the first gear, so that the elastic sleeve It consists of a second gear for stepwise rotation, and an axis pin that is simultaneously inserted into the hinge arm and the central axis to rotate the hinge arm about the central axis.

In addition, the first gear is arranged radially with respect to the center so that the elastic sleeve rotates stepwise when the elastic sleeve rotates in a state engaged with the second gear, and the second gear is engaged with the first gear. They are arranged radially about the center to prevent free rotation of the elastic sleeve when the teeth are engaged and to enable stepwise rotation of the elastic sleeve.

As can be clearly seen from the above description, the haptic fixation device for the artificial lens of the present invention binds the fixing thread (thread) to the haptic based on an elastic sleeve that wraps around the haptic of the artificial lens and deforms in close contact with the external curve of the haptic. It has the effect of connecting the fixing thread to the haptics of the artificial lens more simply and quickly without requiring cumbersome work, and has the effect of preventing the artificial lens from falling out due to reasons such as damage to the fixing thread.

In addition, the elastic sleeve is rotated based on the support link to achieve stepwise angle adjustment by the hinge means and the angle adjustment is maintained, and the position of the haptic according to the rotation of the elastic sleeve causes the intrascleral intraocular lens to be moved. Since it is possible to correct the anteroposterior position and orientation angle of the artificial lens for focusing so that the light ray passing through the optic is focused precisely on the center of the retina, the effective position of the artificial lens ( Not only can the effective lens position be adjusted, but with this advantage, the risk of corneal damage required during removal can be avoided by using the integrated intraocular lens without replacement, and by positioning the intraocular lens posteriorly, pigmentary glaucoma or iris disease can be avoided. It is effective in preventing damage, etc.

In addition, through achieving the various effects described so far, the development of artificial phakic fixation for cataract treatment (shortening of surgical time, promotion of surgical convenience, suppression of complications after surgery, etc.) as well as advancement of related medical technology and medical industry. It is a very useful invention that can greatly contribute to development and revitalization.

Figures 1(a)(b) are structural diagrams of a typical artificial lens.
Figure 2 is a three-dimensional perspective view showing the haptic fixation device for the artificial lens according to the present invention.
Figure 3 is an exploded perspective view showing the structural relationship of the haptic fixation device for the artificial lens according to the present invention.
Figure 4 is an operation example showing the deflection operation of the hinge means in the haptic fixation device for the artificial lens according to the present invention.
Figure 5 is a combination example showing the connection relationship between the elastic sleeve and the haptic among the haptic fixation devices for the artificial lens according to the present invention.
6 to 7C are diagrams showing an embodiment of the haptic fixation device for an artificial lens according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that a person skilled in the art can easily practice the present invention.

First, it should be noted that when adding reference numerals to components in the drawings, the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing the present invention, if it is determined that a detailed description of a related known structure or function may obscure the gist of the present invention, the detailed description will be omitted.

Among the attached drawings, Figure 2 is a three-dimensional perspective view showing the haptic fixation device for the artificial lens according to the present invention, Figure 3 is an exploded perspective view showing the structural relationship of the haptic fixation device for the artificial lens according to the present invention, and Figure 4 is a perspective view showing the configuration of the haptic fixation device for the artificial lens according to the present invention. This is an operation example showing the deflection operation of the hinge means in the haptic fixation device for the artificial lens according to .

As shown in Figures 2 and 3, the haptic fixation device (A) for the artificial lens according to the present invention is coupled to the haptic in a form that surrounds the haptic of the artificial lens and is capable of being tightly deformed in response to the external curvature of the haptic. The elastic sleeve (1) and the hinge combination of the elastic sleeve (1) enable the angle adjustment of the elastic sleeve (1) to correct the anteroposterior position and orientation angle of the intrascleral intrascleral intraocular lens, while pulling the haptic to fix the intrascleral intrascleral intraocular lens. In addition to the mutual coupling of the support link (2) to which the fixing yarn (t) is connected, the elastic sleeve (1) and the support link (2) to achieve, the elastic sleeve (1) based on the support link (2) It includes a rotation angle and a hinge means (3) for stepwise adjustment of the rotation angle.

The elastic sleeve (1) is for connecting the fixing thread (t) to the haptic of the artificial lens, and includes a sleeve body (11) coupled to the haptic in a form that surrounds the haptic, and a sleeve body (11) connected to the haptic. It consists of at least one hinge arm (12) that protrudes and is coupled to the hinge means (3).

The sleeve body 11 has a tubular shape in which a hollow 111 through which the haptic of the artificial lens is inserted is penetrated along the longitudinal direction, and when the haptic is inserted through the outer curve of the haptic. Since it is closely deformed in response, it is preferably made of silicone material that is not harmful to the human body and has elasticity.

At least one of the hinge arms 12 protrudes from a designated portion of the sleeve body 11 so as to come into close contact with one or both ends of the support link 2, and the hinge means 3, which will be described later, is provided at a protruding end thereof. The first through hole 121 into which the shaft pin is inserted is penetrated.

The support link (rotation link, 2) is for connecting the elastic sleeve (1) and the fixing yarn (t) and supporting the elastic sleeve (1). The fixing yarn (t) is connected to one side while the elastic sleeve (1) is connected to the elastic sleeve (1). A support 21 supporting (1), and a central axis 22 that is integrally formed on the other side of the support 21 and is coupled to the elastic sleeve 1 and becomes the center of rotation of the elastic sleeve 1 It is composed.

The support 21 preferably has a rod shape suitable for connecting the fixing thread t and supporting the elastic sleeve 1.

The central axis 22, like the first through hole 121 of the hinge arm 12, has a cylindrical shape through which a second through hole 221 is inserted into which the axis pin of the hinge means 3, which will be described later, is inserted. It is desirable.

The hinge means (3) is for rotation and angle adjustment of the elastic sleeve (1) with respect to the support link (2) in the interconnected elastic sleeve (1) and support link (2), As shown in Figures 2 to 4, a first gear 31 formed on the inner surface of the hinge arm 12 of the elastic sleeve 1, and a support link 2 facing the hinge arm 12 ), a second gear 32 formed on the longitudinal outer surface of the central axis 22 and engaged with the first gear 31 to enable stepwise rotation of the elastic sleeve 1, and the hinge arm It is composed of an axis pin (33) that is simultaneously inserted into (12) and the central axis (22) to allow axial rotation of the hinge arm (12) based on the central axis (22).

The first gear 31 is radial about the center so that when the elastic sleeve 1 rotates in a state engaged with the second gear 32, the elastic sleeve 1 rotates in stages. It is desirable to arrange it as

The second gear 32 is arranged radially about the center to prevent free rotation of the elastic sleeve 1 when the first gear 31 is engaged and to enable stepwise rotation of the elastic sleeve 1. It is desirable to be

The operation of the haptic fixation device (A) of the artificial lens according to the present invention, which has the above configuration, will be described in detail as follows.

First, Figure 5 is a combination example showing the connection relationship between the elastic sleeve and the haptic among the haptic fixation devices for the artificial lens according to the present invention, and Figures 6 to 7c show an embodiment of the haptic fixation device for the artificial lens according to the present invention. As shown in the usage state diagram, as shown in FIGS. 6 to 7C, when performing intraocular lens scleral fixation, the fixing thread (t) for fixing the intrascleral intrascleral intraocular lens (900) is connected to the haptic (920) of the intrascleral intraocular lens (900). The haptic fixing device (A) of the artificial lens of the present invention can be used for the purpose of not only improving the convenience of connection work but also correcting the position (focusing) of the intrascleral intrascleral intraocular lens (900).

Specifically, first, using a surgical tool such as forceps, the sleeve body 11 of the elastic sleeve 1 of the artificial lens haptic fixation device A of the present invention is attached to the haptic 920 of the artificial lens 900. When combined, this can be achieved by passing the tip of the haptic 920 through the hollow 111 formed in the sleeve body 11 to be inserted into a through-insertion state (see FIG. 5).

At this time, when the haptic 920 is inserted through the sleeve body 11 as described above, the sleeve body 11 is deformed in accordance with the external curve of the haptic 920, so that the sleeve body 11 and the haptic 920 The bonding force is maximized.

Next, another fixation device (A) is coupled to the other haptic 920 of the artificial lens 900 in the same manner as described so far.

In this way, after completing the coupling of the elastic sleeve 1 to each haptic 920 of the artificial lens 900, the support link 2 coupled to the elastic sleeves 1, as shown in FIGS. 6 and 7A, ), the fixed threads (t) extending from the fixed threads (t) are pulled out of the sclera in mutually symmetrical directions, and the artificial lens 900 is placed in the correct position.

Next, as shown in FIGS. 7B and 7C, the front and rear position correction and angle correction of the artificial lens 900 are used to ensure that the light ray passing through the optic 910 of the artificial lens 900 is focused accurately on the center of the retina. This can be achieved by rotating the sleeve body 11 of the elastic sleeve 1 in the desired direction using a surgical tool such as forceps. At this time, the first and second hinge means (3) are formed on the inner surface of the hinge arm (12) protruding from the sleeve body (11) and the outer surface of the central axis (22) of the support link (2) and are engaged with each other. Among the gear teeth 31 and 32, the first gear tooth 31 formed on the inner surface of the hinge arm 12 engages and rotates along the second gear tooth 31 formed on the outer surface of the hinge means 3. Based on this, it is possible to adjust the angle of the sleeve body 11 in stages and also to firmly maintain the state of the angle adjustment (preventing free rotation of the sleeve body).

Subsequently, when the fixation of the artificial lens 900 as well as the position correction and angle correction are completed as described above, the fixing threads (t) connected to each support 21 of the support links 2 are further pulled to haptic 20 ) to ensure that the artificial lens 900 is firmly fixed within the sclera by providing appropriate tension, then cut the fixing threads (t) to an appropriate length, melt the cut end, and insert the inflated bulb into the sclera to fix it. The surgery is completed with the process (see FIGS. 6 to 7C).

In summary, according to the haptic fixation device (A) for the artificial lens of the present invention, the elastic sleeve (1) surrounds the haptic 920 of the artificial lens 900 and is deformed in close contact with the external curve of the haptic 920. Accordingly, it is possible to more easily and quickly connect the fixation thread (t) to the haptic 920 of the artificial lens 900 without requiring the cumbersome work of tying the fixation thread (t) to the haptic 920.

In addition, the elastic sleeve 1 is rotated with respect to the support link 2 while adjusting the angle in stages by the hinge means 3, and the angle adjustment is maintained, so that the elastic sleeve 1 rotates. Anterior and posterior positions of the intrascleral intraocular lens 900 for focusing so that the ray of light passing through the optic 910 of the intrascleral intraocular lens 900 is accurately focused on the center of the retina by moving the position of the haptic 920 according to the movement. It is possible to achieve the effect of correcting the beam angle.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. . In addition, the scope of protection of the present invention should be interpreted in accordance with the scope of the patent claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present invention.

A: fixing device, t: fixing thread
1: elastic sleeve, 2: support link
3: Hinge means, 11: Sleeve body
12: hinge arm, 21: support
22: central axis, 31: first gear
32: 2nd gear, 33: shaft pin
111: hollow, 121: first hollow
221: Second public service

Claims (5)

An elastic sleeve that is coupled to the haptic in a form that surrounds the haptic of the artificial lens and is tightly deformable in response to the external curve of the haptic;
The hinge connection with the elastic sleeve allows the angle of the elastic sleeve to be adjusted for correction of the anteroposterior position and orientation angle of the intrascleral intrascleral intraocular lens, while a support link to which a fixing thread is connected to pull the haptic and achieve fixation of the intrascleral intrascleral intraocular lens ; and,
In addition to the mutual coupling of the elastic sleeve and the support link, a hinge means for rotation of the elastic sleeve with respect to the support link and stepwise adjustment of the rotation angle,
The elastic sleeve includes a sleeve body coupled to the haptic in a form that surrounds the haptic of the artificial lens,
Consists of at least one hinge arm that protrudes from the sleeve body and is coupled to the hinge means,
The sleeve body has a tubular shape with a hollow hole through which the haptic of the artificial lens is inserted along the longitudinal direction, and is made of an elastic material that is closely deformed in response to the external bending of the haptic when the haptic is inserted through it. and
The support link includes a support bar to which a fixing thread is connected to one side and supports the elastic sleeve,
A haptic fixation device for an artificial lens, characterized in that it is formed integrally with the other side of the support, is coupled to the elastic sleeve, and consists of a central axis that is the center of rotation of the elastic sleeve.
delete delete According to paragraph 1,
The hinge means includes a first gear formed on an inner surface of the hinge arm,
a second gear formed on the longitudinal outer surface of the central axis facing the hinge arm and engaged with the first gear to enable stepwise rotation of the elastic sleeve;
A haptic fixation device for an artificial lens, characterized in that it is composed of an axis pin that is simultaneously inserted into the hinge arm and the central axis and rotates the axis of the hinge arm about the central axis.
According to clause 4,
The first gear is arranged radially about the center so that the elastic sleeve rotates stepwise when the elastic sleeve rotates while engaged with the second gear,
The second gear is arranged radially about the center to prevent free rotation of the elastic sleeve when the first gear is engaged and to enable stepwise rotation of the elastic sleeve.

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