KR101685602B1 - Lenticule extraction tool for smile surgery - Google Patents

Abstract

The present invention relates to a lenticule extraction tool for smile surgery. According to the present invention, the amount of cornea lenticule excision can be minimized depending on a surgery subjects eyesight and cornea stiffness, and cornea lenticule separation can be reliably performed even in the case of very small thickness and angle of the outside circumferential surface of the cornea lenticule for surgery quality improvement. The lenticule extraction tool for smile surgery includes a guide tip and a grip connected to the guide tip and formed to be gripped by a surgeon. The guide tip ensures a space for an inward movement of a scraper by lifting from an inner skin tissue of a cornea stroma a lower part of a lenticule surface, which is a part of the outside circumferential surface of the cornea lenticule separated from the cornea stroma and forming an acute angle. The scraper cuts a tissue bridge present between the inner skin tissue of the cornea stroma and the cornea lenticule by alternately moving into a space between a flap surface as an upper surface of the cornea lenticule and the inner skin tissue of the cornea stroma in contact therewith and a space between the lenticule surface as the lower surface of the cornea lenticule and the inner skin tissue of the cornea stroma in contact therewith when the cornea lenticule is separated from the cornea stroma by femtosecond laser being transmitted through the surface of the cornea during smile surgery in which the thickness and position of the cornea lenticule is selectively adjusted that is to be excised by the use of the femtosecond laser.

Description

{LENTICULE EXTRACTION TOOL FOR SMILE SURGERY}

The present invention relates to a lenticular extraction tool for smiley surgery, which can minimize the amount of resection of a corneal lenticule according to the visual acuity of the subject and the stiffness of the cornea, The present invention relates to a lenticular extraction tool for smile surgery, which can reliably separate a corneal stroma piece even when the thickness and angle of the outer circumferential surface of the corneal stroma piece are made small.

Laser ablation, which is commonly referred to as "laser assisted in situ keratomileusis" (LASIK), is a technique in which a circular flap (a kind of lid) is formed on the surface of a cornea and then a correction is made by burning the middle layer It is an operation.

Conventional LASIK surgery, as mentioned above, completely cuts the surface of the cornea in the surgical procedure. Therefore, it takes a long time to recover the operation due to the corneal injury. In addition, In addition, there was a high risk of postoperative complications such as dry eye syndrome and side effects.

In order to overcome the disadvantages of conventional LASIK, such as the above, the vision correction surgery is ReLEX SMILE (Small Incision Lenticule Extraction) surgery.

In the case of smile surgery, laser is used to penetrate the cornea surface to form corneal stroma as much as the amount of correction of the cornea, and it is not necessary to completely cut out the surface of the cornea as in conventional LASIK surgery, And the corneal stroma is extracted.

As a result, it is possible to minimize the corneal injury, thereby reducing the postoperative complications and side effects. In addition, the surgical recovery is rapidly accelerated so that the recipient can recover to the extent that daily life is possible the day after surgery.

One of the major features of such smile surgery is that it selectively controls the thickness and position of the corneal stroma to be excised according to the visual acuity and corneal stiffness of the subject.

At this time, the energy of the laser irradiated to generate the corneal stroma can also be selectively controlled. The minimum energy necessary for separating the corneal lenticules is called a threshold energy, In surgery, this threshold energy is one of the important areas for determining the surgical quality and satisfaction of the surgical operation.

The reason that critical energy is important is that when a low-energy laser near threshold energy is used to perform smile surgery, the bubble spot generated in the cornea parenchyma (the intensity generated by the laser in the process of converting the corneal parenchyma to plasma) It is possible to densely form fine gas bubbles.

Thus, it is possible to improve the surface roughness quality of the cut surface of the corneal stroma, and to satisfy both the contrast surgery quality and the surgical satisfaction of the recipient using a high energy laser.

On the other hand, when a high-energy laser is used to generate the corneal stroma in performing the smile surgery, the size of the bubble spot may become larger and the cut surface of the corneal stroma may become rough.

As mentioned above, when the energy of the laser is increased, it may cause corneal damage and edema due to excessive energy, and there is a fear that the patient's surgical satisfaction may be lowered due to the slow recovery rate and the unclear view.

On the other hand, when smile surgery is performed using low energy close to the critical point energy, as described above, since the size of the bubble spot is small, a discontinuous region of the tissue bridge can be generated between the bubble spots to be continuously formed.

Therefore, in the low energy smile operation procedure, a removal process for removing the tissue bridge is required. Through the tissue bridge removal process, the corneal stroma piece can be completely separated from the corneal stroma.

Particularly, low energy smile surgery selectively controls the thickness and position of the corneal stroma to be excised according to the visual acuity and corneal stiffness of the recipient. As the ablation amount of the corneal stroma to be resected becomes smaller, the thickness of the outer circumferential surface of the corneal stroma Thinning and forming an acute angle.

In order to remove the tissue bridge, it is difficult to secure a space for entering the scraper which enters between the corneal stroma and the endothelial tissue of the corneal stroma.

More specifically, when the low-energy laser penetrates the cornea surface and separates the corneal stroma from the corneal stroma, the scraper scatters between the upper surface of the corneal stroma and the endothelial tissue of the corneal stroma in contact therewith, And the endothelial tissues of the corneal stroma adjacent to each other are alternately entered to cut the tissue bridge existing between the endothelial tissue of the corneal stroma and the corneal stroma.

Here, entering the scraper through the corneal stroma and the endothelial tissue of the corneal parenchyma tends to depend on the operator's sense and proficiency, and as the ablation amount of the corneal stroma to be resected becomes smaller, the degree of difficulty in entering the scraper rapidly increases.

Therefore, according to the characteristics of the low energy smile surgery that can minimize the amount of the corneal stroma to be resected according to the visual acuity and corneal stiffness of the patient, a small amount of corneal stroma can be separated with high reliability. It is necessary to develop a tool for extracting a corneal stroma which can be easily handled.

The object of the present invention is to minimize the amount of corneal lenticule resection according to the visual acuity of the subject and the stiffness of the cornea, The present invention also provides a lenticular extraction tool for smiley surgery, which can reliably separate corneal stroma pieces even when the thickness and angle of the circumferential surface are small.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not to be construed as limiting the invention as defined by the artistic scope and spirit of the invention as disclosed in the accompanying claims. It will be possible.

According to an aspect of the present invention, there is provided a lenticular extraction tool for smiley surgery, which comprises a lenticular lens removal device for selectively controlling a thickness and a position of a lenticule to be excised using a femtosecond laser according to a visual acuity of a subject and corneal stiffness Wherein when the femtosecond laser penetrates the corneal surface and separates the corneal stroma from the corneal stroma, the flap surface, which is the upper surface of the corneal stroma, and the endothelial tissue of the corneal stroma, The lenticular surface of the corneal stroma is alternately entered between the lenticular surface of the corneal stroma and the endothelial tissue of the corneal stroma adjacent to the lenticular surface of the corneal stroma, , Which is separated from the corneal stroma to form an acute angle Group contains by raising the lower part of the outer peripheral surface of the stromal pieces corresponding to the lentivirus from kyulmyeon endothelial organization of the corneal stroma, the guide tip to secure a space in which the scrapers can not enter; And a grip which is connected to the guide tip and is configured to be gripped by a practitioner.

When the insertion surface is inserted into a lower portion of the outer circumferential surface of the corneal stroma corresponding to the lenticular surface, the outer circumferential surface of the corneal stroma is moved along a predetermined angle to be lifted And a bent portion provided at a part of the longitudinal direction connected to the grip and bent to a predetermined angle so as to extend to the insertion surface.

And the guide tip is configured to push out the outer circumferential surface of the corneal stamen pieces forming the acute angle with a predetermined length so as to make the corrugated skin, and the scraper has an outer circumferential surface As shown in FIG.

In addition, when the outer circumferential surface of the corneal stroma piece forming the acute angle is pushed out, the guide tip may be arranged so that the outer circumferential surface of the corneal stroma piece may be hooked in a vertical direction May comprise a formed pusher.

The guide tip may include an under tip inserted between a lower portion corresponding to the lenticular surface and an endothelial tissue of the corneal stroma, the outer circumferential surface of the corneal stroma forming an acute angle; And an overtip inserted between an upper portion corresponding to the flap surface and an endothelial tissue of the corneal stroma in an outer circumferential surface of the corneal stroma piece.

Wherein the overtip is disposed on the same line as the grip, and the under tip includes a connecting portion extending from the overtip at a predetermined angle and extending from the distal end of the connecting portion so as to be parallel to the overtip, Wherein when the outer circumferential surface of the corneal stroma forming the acute angle is formed by pushing a lower portion corresponding to the lenticular surface of the corneal stroma forming the acute angle, And can be received between the under tips.

Further, the thickness of the guide tip gradually decreases from the outer circumferential surface of the corneal stroma to the distal end that is preferentially inserted into the lenticular surface, and the width of the vertical section perpendicular to the longitudinal direction toward the distal end is gradually narrowed As shown in FIG.

The smile operation may include: a centering step of centering the center of the femtosecond laser to the corneal apex of the subject; The femtosecond laser is irradiated to form a continuous bubble spot from the outside of the cornea to form a spiral toward the apex of the cornea to form a continuous lenticular surface of the corneal stroma to be cut from the corneal stroma of the subject. Cube surface formation step; The femtosecond laser is irradiated so as to form a spiral toward the outside of the cornea at the apex of the cornea to form a continuous bubble spot so as to form a flap which is a top surface of the corneal stroma to be cut from the corneal stroma of the subject, A surface forming step; Forming an incision in the entire surface of the cornea of the subject who is close to the outer periphery of the flap surface in order to extract the cut corneal stroma from the corneal stroma of the subject; Removing a tissue bridge existing between the flap surface and the endothelial tissue of the corneal stroma adjacent to the flap surface by entering the scraper through the incision; Securing a space in which the scraper can enter between the lenticular surface and the endothelial tissue of the corneal stroma by lifting a lower portion of the outer circumferential surface of the corneal stroma piece corresponding to the lenticular surface; A lenticular surface separation step of removing a tissue bridge existing between the lenticular surface and the endothelial tissue of the corneal stroma in contact with the sclera through the incision; And a corneal stroma piece removal step of removing the corneal stroma pieces separated from the corneal stroma through the incision through the incising window, wherein the guide tip is inserted through the incision window in the step of securing the entrance space And a lower portion corresponding to the lenticular surface of the outer circumferential surface of the corneal stroma is lifted to secure a space in which the scraper can enter between the lenticular surface and the endothelial tissue of the corneal stroma.

The femtosecond laser may be a low energy laser having an output value of 20 steps to 100 nJ to 22 steps to 110 nJ.

The lenticular extraction tool for smiley surgery according to the present invention having the above-described configuration has the following effects.

In addition to minimizing the amount of resection of the corneal lenticule according to the visual acuity of the recipient and the stiffness of the cornea, the thickness and angle of the outer circumferential surface of the corneal stroma are slightly The corneal stroma can be separated with high reliability.

On the other hand, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a cross-sectional view of a cornea on which a corneal stroma is formed.
2 shows a process of forming a corneal stroma piece using a low-energy laser.
FIG. 3 shows a process of separating a corneal stroma from a corneal stroma using a scraper.
4 is a cross-sectional view taken along the line AA of Fig.
5 shows a scraper used in a surgical procedure of low energy smile surgery.
6 to 7 show a lenticular extraction tool for smileys according to an embodiment of the present invention.
8 to 9 illustrate a step of securing an entry space during a surgical procedure using a lenticular extraction tool for smile surgery according to an embodiment of the present invention.
FIG. 10 shows an example of a modification of the lenticular extraction tool for smileys according to an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention in which the object of the present invention can be specifically realized will be described with reference to the accompanying drawings. In describing the present embodiment, the same names and the same symbols are used for the same components, and further description thereof will be omitted.

Further, in describing the present embodiment, the configuration shown in the drawings is only an example for helping understanding of the detailed description, and thus the scope of the right is not limited.

The low-energy smile surgery using the smile surgical removal tool according to the present invention irradiates the corneal tissue with a low-energy laser to generate a plasma state bubble spot (gas bubble) in which the corneal tissue is converted into a corneal tissue, The corneal tissue can be precisely cut as desired.

The use of a low-energy laser to remove corneal lenticular debris and remove the corneal stroma is used to correct for poor visual acuity with priming, myopia, astigmatism, and astigmatism. incision lenticule extraction).

Such smile surgery may consist of a centration step, a lenticum surface formation step, a flap surface formation step, a incision formation step, a flap surface separation step, a lenticular surface separation step, and a corneal stroma lenticular extraction step.

First, in the centering step, the center of the low energy laser can be made to coincide with the vertex of the cornea of the subject.

Here, the low energy laser may be a femtosecond laser having an output value of 20steps of 100 nJ to 22step of 110 nJ. In addition, it is possible to use a low energy value which can pass through the surface layer of the cornea and allow the endothelial tissue of the corneal stroma to be converted into a plasma state. Any laser can be used without limitation.

As described above, the energy value of the low energy region, particularly from 100 nJ to 110 nJ, is the threshold energy that can pass through the cornea and excise the corneal stroma. When the corneal stroma is excised from the corneal stroma through the femtosecond laser with the critical energy Corneal damage can be minimized due to low energy, so that a quick recovery of visual acuity can be expected.

On the other hand, the center of the low-energy femtosecond laser is aligned with the corneal vertex rather than the pupil center because the 'axis of sight' that determines the actual visual acuity is the apex of the cornea rather than the center of the pupil.

In other words, for the correct correction of the visual acuity, it is necessary to adjust the center of the laser to the apex of the cornea to perform the surgery because the optical center of the visual acuity is different from the center of the pupil. Therefore, Aberration 'can be increased.

This increase in high-order aberrations can lead to post-operative light bleeding, which can cause a reduction in the quality of visual acuity that is actually felt apart from the corrected visual acuity.

The center of the laser coincides with the precise corneal apex through this centration step, and then the laser irradiation device can be brought into close contact with the cornea of the recipient for the purpose of making the lenticular corpuscular piece.

Then, in the lenticular plane forming step, the femtosecond laser is irradiated from the outside of the cornea of the client to form a spiral toward the corneal vertex so as to form a continuous bubble spot. Thus, A cucumber surface can be formed.

Here, as shown in FIG. 1, the corneal stroma 20 occupies about 90% of the thickness of the cornea 10, and collagen fibers (collagen fibers) are the majority.

The lenticular surface 32 is a lower surface of the corneal stroma piece 30 separated from the corneal stroma 20 by a bubble spot and is a corneal stroma 20 located on the descemet's membrane of the cornea 10, Lt; RTI ID = 0.0 > femtosecond < / RTI >

Next, in the flap surface formation step, the femtosecond laser is irradiated so as to form a spiral toward the outside of the cornea 10 from the apex of the cornea 10 to form a continuous bubble spot, whereby the corneal parenchyma to be excised from the corneal stroma 20 The flap surface 31 which is the upper surface of the piece 30 can be formed.

The flap surface 31 is a top surface of the corneal stroma piece 30 separated from the corneal stroma 20 by a bubble spot in the same manner as the lenticular surface 32 described above, Can be generated through the continuity of the bubble spots generated by the femtosecond laser irradiated on the endothelial tissue of the corneal stroma 20 located below.

On the other hand, the lenticular surface forming step and the flap surface forming step as described above are performed by the laser irradiation apparatus programmed according to the amount of corneal correction of the subject, and the flap surface 31 and the lenticular surface 32, The thickness of the corneal stroma 30 to be cut and the position of the cornea pellet 30 to be cut can be selectively determined according to the visual acuity of the subject and the stiffness of the cornea.

Next, in the incision forming step, a cutout 40, which is a passage for entering the scraper for removing the tissue bridge and a passage for removing the cut corneal stroma piece 30, may be formed on the surface layer of the cornea 10, May be formed to have a width of 2 mm to 4 mm.

The incision window 40 may be formed on the entire surface of the cornea near the outer circumference of the flap surface 31 and may be formed by cutting a surface layer of the cornea 10 using a femtosecond laser. The femtosecond laser used in forming the cornea 40 can be used by switching the output energy value so that the surface layer of the cornea 10 can be sufficiently cut.

When the scraper for completely separating the corneal stroma 30 from the corneal stroma 20 through the incision 40 formed on the surface of the wearer's cornea 10 enters the flap surface separation step and the lenticular surface separation step .

2, since the femtosecond laser L of low energy is used as the corneal stroma 30 formed through the lenticular surface forming step and the flap surface forming step, the size of the bubble spot 33 is And can be extremely finely formed.

The tissue bridge 34 can be created between the bubble spots 33 that are to be continuously formed and the corneal stroma piece 30 from the corneal stroma 20 due to the tissue bridge 34 It is not completely separated.

 In order to cut the tissue bridge 34 as described above, a surgical tool called a scraper is used in the low energy smile surgery in which the smiley surgical lenticular extraction tool according to the present invention is applied. In the process of cutting the tissue bridge using the scraper, A separating step and a lenticular surface separating step.

3 to 4, the scraper enters the corneal stroma 20 through the incision 40 formed in the surface layer of the cornea 10 of the subject, so that the flap surface 31, The tissue bridge 34 existing between the endothelial tissues of the corneal stroma 20 in contact therewith can be removed.

At this time, the scraper 200 may include a scrap portion 210, a handle portion 220, and a connection portion 230, as shown in FIG.

When the femtosecond laser passes through the corneal surface and separates the corneal stroma piece 30 from the corneal stroma 20, the scrap part 210 is inserted into the corneal stroma 20 through the incision 40, Between the flap surface 31 and the endothelial tissue of the corneal stroma 20 adjacent thereto and between the lenticular surface 32 and the endothelial tissue of the corneal stroma 20 in contact therewith.

The scrap portion 210 passes the surface of the flap surface 31 and the lenticular surface 32 and cuts the tissue bridge 34 existing between the endothelial tissue of the corneal stroma 20 and the corneal stroma 30 Thereby separating the corneal stroma pieces 30 from each other.

In addition, the lower surface of the scrap part 210 may have the same curvature radius as the flap surface 31 along the longitudinal direction, and may be provided so as to be close to the curvature radius value of the Asian cornea.

In addition, the distal end 212 of the scrap portion 210 may be formed in a round shape having a diameter wider than the width of the vertical cross section of the scrap portion 210 in the longitudinal direction. The distal end 212 of the scrap portion 210 may be formed so as to be thinner toward the outer periphery.

The handle portion 220 may be a grip portion of the scraper 200 extending from the scrap portion 210 for moving the scrap portion 210, and may be configured to be easily gripped by a practitioner.

The connecting portion 230 is a portion for supporting the scraper 200 to the cornea 10 when the scraper 210 moves to remove the tissue bridge 34 in the corneal stroma 20, The corneal stroma piece 30 can be separated by operating the handle portion 220 while fixing the corneal stroma 230 to the cornea 10 of the subject.

The connecting portion 230 may be provided with a predetermined curvature so as to prevent the cornea 10 from being damaged by a force transmitted to the cornea 10 through the connection portion 230 when the scraper 200 is operated. So that the scrap part 210 and the handle part 220 can be connected.

On the other hand, in order to separate the corneal stroma piece 30 to be cut from the corneal stroma 20, the scraper 200 having the above-described structure is inserted between the corneal stroma 30 and the endothelial tissue of the corneal stroma 20 It tends to depend on the operator's sense and proficiency.

Particularly, the difficulty of entering the scraper 200 between the corneal stroma 20 and the corneal stroma 30 as the amount of the stroma of the corneal stroma 30 to be excised is made small in accordance with the characteristics of low energy smile surgery .

According to the characteristics of the low energy smile surgery that can minimize the ablation amount of the corneal stroma 30 according to the visual acuity and corneal stiffness of the patient, a small amount of corneal stroma 30 can be separated with high reliability And a tool for extracting a corneal stroma, which can easily facilitate entry of the scraper 200, has been required.

The lanciculotomy tool for smileys according to an embodiment of the present invention includes a scraper 200 for separating the flap surface 31 from the scraper 200, The scraper 200 can be used in the step of securing an entrance space for securing a space in which the scraper 200 can enter between the lenticular surface 32 and the endothelial tissues of the corneal stroma 20 when the lenticular surface 32 is separated, 6 to 7, the guide tip 110 and the grip 120 may be included.

First, the guide tip 110 is inserted into a lower portion corresponding to the lenticular surface 32 in the outer circumferential surface of the corneal stroma 30 when the insertion surface 112 is inserted into the outer circumferential surface of the corneal stroma 30 And a bent surface 111 that is bent at a predetermined angle and extends to the insertion surface 112 so that a part of the portion along the longitudinal direction connected to the grip 120 can be lifted and moved along the preset angle .

At this time, the thickness of the guide tip 110 gradually decreases toward the distal end 112a, which is preferentially inserted into the lenticular surface 32, of the outer peripheral surface of the corneal stroma piece 30 of the insertion surface 112, The width of the vertical section perpendicular to the longitudinal direction of the insertion surface 112 gradually decreases.

As a result, it is possible to enter the lower portion of the lenticule surface 32 in the outer circumferential surface of the corneal stroma piece 30 forming the acute angle of the thin film and acute angle, thereby raising the outer circumferential surface of the corneal stroma piece 30 Can be facilitated.

In the step of securing the entrance space using the guide tip 110, as shown in FIG. 8, the lenticular surface 32 is formed on the outer circumferential surface of the corneal stroma piece 30, which is separated from the corneal stroma 20 and forms an acute angle, By lifting the lower portion of the corneal stroma 20 from the endothelial tissue of the corneal stroma 20, it is possible to secure a space in which the scraper 200 described above enters.

The step of securing the entrance space for securing the space for the scraper 200 to enter using the guide tip 110 may be performed between the flap surface separation step and the lenticular surface separation step described later.

Next, the grip 120 is a kind of knob connected to the guide tip 110 so that the operator can grip the guide tip 110 and manipulate the guide tip 110, so that the grip 120 can be easily gripped by the operator.

9, in the case of the guide tip 110 according to the present embodiment, the corneal parenchyma 30, which enters the cornea 10 through the incision 40 and forms an acute angle, And the scraper 200 is inserted into the outer peripheral surface of the corneal stroma piece 30 having the corrugated surface formed by the guide tip 110. In this way, As shown in Fig.

For this, the guide tip 110 according to the present embodiment may include a pusher 113 as shown in FIG. 10 (a).

Here, the pusher 113 is disposed in the longitudinal direction connected to the grip 120 so that the outer circumferential surface of the corneal stroma piece 30 can be hooked when the outside peripheral surface of the corneal stroma piece 30 forming the acute angle is pushed out In the vertical direction.

The operator can easily push out and wrinkle the outer circumferential surface of the corneal stamen piece 30 forming the thin film and acute angle through the pusher 113 so that the scraper 200 can be easily removed from the lenticular surface It is possible to secure a space for entering the lower side of the cork face 32.

The guide tip 110 according to the present embodiment may be divided into two parts, that is, an under tip 115 and an over tip 114 as shown in FIG. 10 (b).

The under tip 115 may be inserted between the lower portion corresponding to the lenticular surface 32 and the endothelial tissue of the corneal stroma 20 in the outer circumferential surface of the corneal stroma piece 30 forming the acute angle.

The overtip 114 may be inserted between the upper portion corresponding to the flap surface 31 and the endothelial tissue of the corneal stroma 20 among the outer circumferential surface of the corneal stroma piece 30.

At this time, the overtip 114 is disposed on the same line as the grip 120, and the undertip 115 includes a connection portion 115a extending from the overtip 114 at a predetermined angle, And an insertion portion 115b that is bent and extended so as to be parallel to the overtip 114 from the insertion portion 115b.

When the insertion portion 115b of the under tip 115 is lifted up by pushing the lower portion corresponding to the lenticular surface 32 in the outer circumferential surface of the corneal stroma piece 30 in the abovementioned step of securing the entrance space, The outer circumferential surface of the piece 30 may be received between the overtip 114 and the under tip 155.

The operator can more easily perform the entering space securing step using the lenticular extraction tool according to the present embodiment having the above-described configuration. Due to the characteristics of the low energy smile surgery, the outer circumferential surface Even if the thin film has an acute angle, the space for entering the scraper 200 can be secured with high reliability for the lenticular surface separation step to be performed later.

Subsequently, the surgical procedure of low energy smile surgery may lead to a lenticular surface separation step.

The lenticular surface separation step is a step of cutting the tissue bridge 34 (see FIG. 2) using the scraper 200 in addition to the plan surface separation step described above. The scraper 200 enters the incision window 40, The tissue bridge existing between the cervical surface 32 and the endothelial tissue of the corneal stroma 20 in contact therewith can be removed.

Meanwhile, in the flap surface separation step and the lenticular surface separation step, the order may be arbitrarily changed under the judgment of the operator during the surgical procedure. When the lenticular surface separation step is preceded, the lenticular surface separation step, Can be preceded.

Next, the cornea pellets 30 completely separated from the endothelial tissue of the corneal stroma 20 through the flap surface separation step and the lenticular surface separation step can be removed from the cornea 10 of the subject through the corneal stroma extraction step have.

In the step of extracting corneal stroma, the corneal stroma piece 30 completely separated from the corneal stroma 20 can be taken out through the incision window 40 by entering the tweezers through the incision window 40.

Thereafter, a finishing process of injecting an eye solution or the like into the patient's cornea 10 to remove residues and floating matters generated during the operation can be performed.

As described above, the operation procedure of the low-energy smile surgery using the lenticular extraction tool for smile surgery according to the embodiment of the present invention has been described. In addition to the above-described embodiments, the present invention is not limited to the above- The fact that it can be embodied in a specific form is obvious to those of ordinary skill in the art.

Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the invention is not limited to the above description, but may be modified within the scope and equivalence of the appended claims.

10: cornea
20: corneal parenchyma
30: corneal stroma (lenticular)
31: flap surface
32: Lenticular surface
33: Bubble spot
34: Tissue bridge
40: incision window
100: Lenticular extraction tool for smileys according to the present invention
110: Guide Tips
120: grip

Claims (9)

In smile surgery, which selectively adjusts the thickness and position of a lenticule to be resected using a femtosecond laser according to the visual acuity of the recipient and the corneal stiffness,
When the femtosecond laser passes through the corneal surface and separates the corneal stroma from the corneal stroma, the flap surface, which is the upper surface of the corneal stroma, and the endothelial tissue of the corneal stroma, As a tool to secure a space for entering the scraper which alternately enters between the lenticular surface and the endothelial tissue of the corneal stroma in contact therewith to cut the tissue bridge existing between the endothelial tissue of the corneal stroma and the corneal stroma ,
The outer circumferential surface of the corneal stroma piece separated from the corneal stroma and forming an acute angle is pushed out to a predetermined length to form a corrugation and a lower portion corresponding to the lenticular surface of the outer circumferential surface of the corneal stroma A guide tip for lifting the corneal stroma from the endothelial tissue to secure a space in which the scraper can enter; And
And a grip which is connected to the guide tip so as to be gripped by an operator,
The guide tip,
A pusher formed in a portion perpendicular to the longitudinal direction connected to the grip so that an outer circumferential surface of the corneal stroma piece is hooked and formed when the outer circumferential surface of the corneal stroma forming the acute angle is pushed out, Wherein the outer circumferential surface of the corneal stroma is formed so as to enter a lower portion of the lenticular surface of the corneal stroma forming an acute angle to lift the outer circumferential surface of the corneal stroma, The thickness gradually decreases toward the end that is preferentially entered into the lenticular surface and the width of the vertical section perpendicular to the longitudinal direction is gradually narrowed toward the distal end,
The scraper includes:
Is inserted along the outer circumferential surface of the corneal stroma formed with the corrugation by the guide tip.
The method according to claim 1,
The guide tip,
Wherein when the insertion surface is inserted into a lower portion of the outer circumferential surface of the corneal stroma corresponding to the lenticular surface, the outer circumferential surface of the corneal stroma piece is moved and lifted along a preset angle,
And a bent surface provided at a part of the body along the longitudinal direction connected to the grip and bent to a predetermined angle so as to extend to the insertion surface.
delete delete The method according to claim 1,
The guide tip,
An under tip inserted between a lower portion corresponding to the lenticule and an endothelial tissue of the corneal stroma among the outer circumferential surface of the corneal stroma forming an acute angle; And
And an overtip inserted between an upper portion corresponding to the flap surface and an endothelial tissue of the corneal stroma in an outer circumferential surface of the corneal stroma piece.
6. The method of claim 5,
The over-
A plurality of grips arranged on the same line as the grips,
In the under tip,
A connecting portion extended from the overtip at a predetermined angle and an insertion portion bent and extended from the distal end of the connecting portion so as to be parallel to the overtip,
Wherein when the insertion portion lifts the outer circumferential surface of the corneal stroma forming the acute angle by pushing the lower portion corresponding to the lenticular surface, the outer circumferential surface of the corneal stroma piece is received between the overtip and the under tip Wherein the lancing device comprises:
delete delete delete

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