CN114159226A - Eye tissue treatment equipment - Google Patents
Eye tissue treatment equipment Download PDFInfo
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- CN114159226A CN114159226A CN202011470325.8A CN202011470325A CN114159226A CN 114159226 A CN114159226 A CN 114159226A CN 202011470325 A CN202011470325 A CN 202011470325A CN 114159226 A CN114159226 A CN 114159226A
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- 210000004087 cornea Anatomy 0.000 claims description 32
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- 241001391944 Commicarpus scandens Species 0.000 abstract 1
- 238000000034 method Methods 0.000 description 35
- 230000004438 eyesight Effects 0.000 description 12
- 238000001356 surgical procedure Methods 0.000 description 7
- 101100008048 Caenorhabditis elegans cut-4 gene Proteins 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000003777 tissue processing method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004410 intraocular pressure Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 206010020675 Hypermetropia Diseases 0.000 description 1
- 201000002287 Keratoconus Diseases 0.000 description 1
- 208000029091 Refraction disease Diseases 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004430 ametropia Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000003046 cornea plana Diseases 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
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- 230000002349 favourable effect Effects 0.000 description 1
- 230000004305 hyperopia Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/008—Methods or devices for eye surgery using laser
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
Abstract
The invention relates to the field of medical equipment, and discloses an eye tissue processing device which comprises a laser light source, an optical system, an optical scanning moving device and a controller. The laser light source generates a femtosecond laser beam; the optical system guides the femtosecond laser beam; the optical scanning mobile device applies the femtosecond laser beam to the eye tissue through the condenser lens; the controller is connected with the laser light source, the optical system and the optical scanning moving device and controls the laser light source to generate a femtosecond laser beam; controlling the optical system to direct the femtosecond laser beam to the optical scanning movement device; and controlling the optical scanning movement device to generate a target treatment region in the eye tissue by the femtosecond laser beam; the target processing area comprises a sharp edge part and a part to be removed, the sharp edge part is ablated by the femtosecond laser beam by the optical scanning moving device, the part to be removed, which needs to be removed from the eye tissue later, can be obtained under the condition of maintaining the strength of the eye tissue, and the part to be removed is not easy to break.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to an eye tissue treatment device.
Background
For the purpose of correcting Vision, a method of changing the curvature of the cornea of an eye using an excimer Laser, which may be called Laser Vision Correction (LVC), is known. Among the laser vision correction procedures, the most common is excimer laser in situ lamellar keratoplasty (LASIK), which accounts for approximately 85% of all laser vision correction procedures.
Early in LASIK surgery, surgeons typically used a physical blade (also known as a microkeratome) to cut a flap of cornea over the cornea, then opened the flap, and then laser ablated the exposed corneal tissue to change the curvature of the cornea. In recent years, as a method for cutting a corneal flap on the cornea, a method using a femtosecond laser has been developed, which forms a tissue separation by forming a very minute point-like cavity with a photocleavage effect by using thousands of laser pulse lights, and further forms a corneal flap. Such a method using a femtosecond laser has been increasingly widely used in LASIK surgery to form a corneal flap, since the femtosecond laser can provide higher safety, repeatability, predictability, and flexibility than a microkeratome. In addition, the use of femtosecond laser can reduce the occurrence of adverse complications associated with the micro-keratome, such as iatrogenic keratoconus (steep cornea), corneal flap displacement (flat cornea), and irregular corneal flap.
However, in LASIK surgery, the corneal flap has difficulty in re-supporting the cornea after surgery against the strength of the intraocular pressure due to the large incision of the flap, thereby greatly weakening the strength of the cornea after surgery.
In addition to LASIK surgery, another method for correcting vision with a femtosecond laser has been developed in recent years, in which a corneal lens is generated in corneal tissue by the femtosecond laser, and then the corneal lens is removed (extracted) from the corneal tissue through a minimally invasive incision generated by the femtosecond laser, thereby changing the curvature of the cornea. In this way, since it is not necessary to create a flap with a large incision, the problem of flap displacement after surgery can be avoided, and the strength of the cornea is not excessively weakened.
As a method for removing (taking out) a corneal lens, it is known to form a corneal lens by cutting two sections of the entire corneal tissue using a femtosecond laser, the two sections including an upper section (called Cap) following the outer shape of the cornea and a lower section (called Curvature) having a higher Curvature than the upper section. Then, a second incision is made at the outer periphery of the corneal lens section using a femtosecond laser to create a minimally invasive incision through the corneal surface, so that the corneal lens can be removed from the corneal tissue through the minimally invasive incision. In this way, after the corneal lens is removed, the outer curvature of the cornea changes by the diopter necessary for correcting the ametropia of the eye (correcting the vision).
Us 10682256 discloses a technique related to a method for removing a corneal lens, in which, in order to prevent the corneal lens from being broken during the removal from the corneal tissue (especially, the peripheral portion of the corneal lens), a compensating thickness must be provided between the upper and lower incised surfaces of the corneal lens to increase the strength of the peripheral portion of the corneal lens. However, as shown in fig. 1 and 2, the method of providing the compensation thickness DH between the upper section 11 ' and the lower section 12 ' results in an increased thickness of the corneal lens to be removed (taken out), so that the total thickness of the remaining cornea 1 ' becomes thinner after the operation, which is less favorable for the strength of the cornea against the intraocular pressure.
Disclosure of Invention
The present invention has an object to provide an eye tissue treatment apparatus which can advantageously overcome the aforementioned problems in the prior art, and can obtain a portion to be subsequently removed (extracted) from an eye tissue with maintaining the strength of the eye tissue, and the portion to be removed (extracted) has a characteristic of being not easily broken.
In order to achieve the purpose, the invention adopts the following technical scheme:
an eye tissue treatment apparatus comprising:
a laser light source configured to generate a femtosecond laser beam;
an optical system configured to guide the femtosecond laser beam generated by the laser light source;
an optical scanning movement device configured to apply the femtosecond laser beam from the optical system to an eye tissue through a condenser lens;
a controller connected with the laser light source, the optical system, and the optical scanning movement device, and configured to:
controlling the laser light source to generate the femtosecond laser beam;
controlling the optical system to direct the femtosecond laser beam to the optical scanning movement device; and
controlling the optical scanning moving device to generate a target processing area in the eye tissue by the femtosecond laser beam, wherein the target processing area comprises a sharp edge part and a part to be removed, and controlling the optical scanning moving device to ablate the sharp edge part by the femtosecond laser beam.
Optionally, the ocular tissue treatment device further comprises:
a removal device configured to remove the portion of the target treatment area to be removed from the ocular tissue.
Optionally, before the removing device removes the portion of the target treatment region to be removed from the ocular tissue, the controller is further configured to control the optical scanning movement device to make a removal incision in the ocular tissue, the removal incision being connected to the target treatment region from an outer surface of the ocular tissue;
wherein the removal device is configured to remove the portion of the target treatment area to be removed via the removal incision.
Optionally, the controller controlling the optical scanning movement device to generate the target treatment region in the ocular tissue by the femtosecond laser beam comprises:
creating an undercut in the ocular tissue;
ablating said sharp-edged portion of said target treatment area; and
creating an upper tangent plane in the eye tissue that is connected to the lower tangent plane.
Optionally, the upper section and the outer periphery of the lower section are connected with each other; wherein the content of the first and second substances,
the sharp edge portion of the target treatment area includes where the upper tangent plane and the lower tangent plane join each other.
Optionally, the upper section is connected with the outer periphery of the lower section, and the upper section is connected with the central part of the lower section;
wherein the sharp edge portion of the target processing region includes a location where the upper tangent plane and the lower tangent plane are connected to each other; and is
Wherein the controller is further configured to control the optical scanning movement device to ablate and generate a cutting plane in the target processing region by the femtosecond laser beam, one end of the cutting plane is connected to the outer periphery of the upper and lower facets, and the other end is connected to the central axis of the upper and lower facets and penetrates through the target processing region.
Optionally, the cutting surface has a planar structure, and the cutting surface penetrating through the target processing area includes: the cutting surface cuts the upper section and the lower section simultaneously to form a cut opening.
Optionally, the controller is further configured to control the optical scanning movement device to make a removal cut in the ocular tissue, the removal cut being connected to the target treatment region from an outer surface of the ocular tissue, the removal cut being located on one side of a central axis of the target treatment region, the cut surface being located on a side of the central axis of the target treatment region facing away from the removal cut.
Optionally, the ocular tissue is a cornea or a crystal.
Optionally, the sharp edge portion comprises a tapered thickness portion, the tapered thickness of the tapered thickness portion being at a minimum of zero.
The invention has the beneficial effects that:
in the eye tissue processing apparatus provided by the present invention, the controller controls the optical scanning moving device to ablate the sharp edge portion of the target processing region by the femtosecond laser beam, so that only the portion to be removed of the target processing region is left to be removed from the eye tissue, and the portion to be removed is not broken during the process of removing the portion from the eye tissue, thereby avoiding the problem of breaking the removed portion of the eye tissue in the prior art.
In addition, the eye tissue processing apparatus provided by the present invention does not need to set an additional compensation thickness for the target processing region by controlling the optical scanning moving device, so as to avoid the problem of cracking during the subsequent process of removing the removed (extracted) portion of the eye tissue. According to the actual requirement of treating the eye tissue, the controller of the eye tissue treatment apparatus of the present invention can control the optical scanning moving device to generate the target treatment region with a corresponding thickness, and the minimum value of the thickness may be zero, i.e. no additional supplementary thickness is required.
In other words, the ocular tissue treatment apparatus of the present invention can avoid an additional increase in thickness beyond the thickness of the target treatment region required for treating (e.g., correcting) ocular tissue, thereby achieving the purpose of maximally maintaining the strength of ocular tissue.
Drawings
FIG. 1 is a schematic cross-sectional view of a corneal lens produced in a cornea according to the prior art;
FIG. 2 is a schematic cross-sectional view of another corneal lens produced in a cornea according to the prior art;
FIG. 3 is a flow chart of a method of ocular tissue treatment provided by the present invention;
FIG. 4 is a schematic front view of a target treatment area generated in an ocular tissue by the ocular tissue treatment method provided by the present invention;
FIG. 5 is a schematic cross-sectional view taken along line I-I of FIG. 4;
FIG. 6 is a schematic front view of another target treatment area generated in an ocular tissue by the ocular tissue treatment method provided by the present invention;
FIG. 7 is a schematic cross-sectional view taken along line II-II of FIG. 6;
fig. 8 is a schematic view of an ocular tissue treatment device provided by the present invention.
In the figure:
1' -the cornea; 11' -upper section; 12' -lower section; DH-compensating thickness;
1-cutting down; 2-cutting the upper section; 4-removing the incision; 8-cutting off the section;
100-an ocular tissue treatment device; 101-a laser light source; 102-an optical system; 103-optical scanning moving means; 104-a condenser; 105-a controller;
e-ocular tissue; o-central axis; t1, T2-target treatment zone; TE-sharp edge portion; TR-portion to be removed.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 3 and 8, the present embodiment provides an ocular tissue treatment apparatus and an ocular tissue treatment method based on the same, which can advantageously overcome the problems in the prior art, and can treat and obtain a portion to be subsequently removed (extracted) from ocular tissue under the condition of maintaining the strength of the ocular tissue, and the portion to be removed (extracted) has the characteristic of being not easily broken.
First, an eye tissue processing method according to an embodiment of the present invention is described with reference to fig. 3. In the following description of the embodiments of the present invention, the cornea is used as an example of the eye tissue, however, the eye tissue to which the eye tissue treatment method of the present invention is applicable is not limited thereto. For example, the method for treating eye tissue according to the present invention can also be applied to eye tissue such as a lens.
As shown in fig. 3, the eye tissue processing method according to the embodiment of the present invention includes steps S101 to S104. First, in step S101, a femtosecond laser beam is generated from a laser light source. Next, in step S102, the femtosecond laser beam is directed toward the eye tissue. Next, in step S103, target treatment regions T1, T2 (see fig. 4 to 7) are generated in the eye tissue E by the femtosecond laser beam, the target treatment regions T1, T2 include sharp edge portions TE including thickness tapers that may have a minimum thickness tapered to a value of zero (i.e., the tapered thickness of the thickness tapers to a minimum value of zero) and portions to be removed TR. More details about the target processing regions T1, T2 will be described later in detail with reference to fig. 4 to 7. Finally, in step S104, the portion to be removed TR of the target processing regions T1, T2 is removed from the eye tissue E.
Examples of two kinds of target treatment regions T1, T2 generated in the eye tissue E by the eye tissue treatment method according to the embodiment of the present invention will be described below with reference to fig. 4 to 7.
Fig. 4 and 5 show an example of a target treatment region T1 generated in an eye tissue E by the eye tissue treatment method according to the embodiment of the invention.
Referring to fig. 4 and 5, the target treatment region T1 generated in the eye tissue E includes: first, an inferior section 1 is generated in the eye tissue E by the femtosecond laser beam, then a sharp edge portion TE of the target processing region T1 is ablated by the femtosecond laser beam, and finally an superior section 2 connected to the inferior section 1 is generated in the eye tissue E by the femtosecond laser beam. After the target processing region T1 has been subjected to such processing, its sharp edge portion TE has been ablated by the femtosecond laser beam to be bubbled, and only the portion TR to be removed remains.
Specifically, in the example shown in fig. 4 and 5, the upper cut plane 2 and the lower cut plane 1 generated by the femtosecond laser beam are connected to each other at the outer periphery of the lower cut plane 1, and thus, the sharp-edged portion TE of the target processing region T1 includes where the upper cut plane 2 and the lower cut plane 1 are connected to each other at the outer periphery of the lower cut plane 1.
In addition, in order to remove the portion to be removed TR of the target treatment region T1 from the eye tissue E, the eye tissue treatment method according to the embodiment of the present invention further includes making a removal incision 4 in the eye tissue E by the femtosecond laser beam, the removal incision 4 being located at the outer periphery of the upper cut face 2 and connecting from the outer surface of the eye tissue E to the upper cut face 2, and therefore, the removal incision 4 is also connected with the target treatment region T1. As such, the portion to be removed TR of the target treatment region T1 can be removed from the eye tissue E through the removal incision 4.
After the portion TR to be removed of the target treatment region T1 shown in fig. 4 and 5 is removed from the eye tissue E, the outer curvature of the eye tissue E (i.e., the cornea in the present embodiment) is changed (e.g., made gentler), thereby achieving the purpose of changing the curvature of the cornea to correct the vision. In other words, the target treatment area T1 shown in fig. 4 and 5 is an example of a target treatment area that needs to be removed from the cornea in order to correct myopia.
Further, fig. 6 and 7 show another example of a target treatment region T2 generated in the eye tissue E by the eye tissue treatment method according to the embodiment of the invention.
Referring to fig. 6 and 7, target treatment region T2 is generated in ocular tissue E in a similar manner to target treatment region T1 shown in fig. 6 and 7, except that in the example shown in fig. 6 and 7, first, undercut surface 1 generated by the femtosecond laser beam has a shape similar to a "W", i.e., undercut surface 1 is a "W" shaped cut; and therefore, the upper cut plane 2 and the lower cut plane 1 generated by the femtosecond laser beam are connected to each other at a portion near the central axis O in addition to the outer periphery of the lower cut plane 1 (refer to fig. 7, that is, the upper cut plane and the central portion of the lower cut plane are connected to each other), and therefore, the sharp edge portion TE of the target processing region T2 includes where the upper cut plane 2 and the lower cut plane 1 are connected to each other at the outer periphery of the lower cut plane 1 and the portion near the central axis O. Further, the sharp edge TE of the target processing region T2 includes the turns at both sides of the lower section 1 of the "" W "" shape. These sharp edge portions TE of the target processing region T2 are each bubbled by being ablated by the femtosecond laser beam.
Further, in order to remove the portion to be removed TR of the target treatment region T2 from the eye tissue E, similarly to the removal of the portion to be removed TR of the target treatment region T1 from the eye tissue E described above, as shown in fig. 6 and 7, the eye tissue treatment method according to the embodiment of the present invention further includes making a removal incision 4 in the eye tissue E by the femtosecond laser beam, the removal incision 4 being located at the outer periphery of the upper cut face 2 and being connected to the upper cut face 2 from the outer surface of the eye tissue E, and therefore, the removal incision 4 is also connected to the target treatment region T2. In this way, the portion TR to be removed of the target treatment region T2 can be removed from the eye tissue E through the removal incision 4.
However, in the example shown in fig. 6 and 7, since the upper cut plane 2 and the lower cut plane 1 of the target processing region T2 are connected to each other at a portion near the central axis O (refer to fig. 7) in addition to the outer periphery of the lower cut plane 1, the target processing region T2 has a doughnut-like shape when viewed from the direction of the front view diagram of fig. 6. In this case, if the portion TR to be removed of the target processing region T2 is to be removed through the removal incision 4, it is necessary to additionally ablate a cut surface 8 (see fig. 6) in the eye tissue E by the femtosecond laser beam, the cut surface 8 connecting the upper cut surface 2 of the target processing region T2 and the portion of the lower cut surface 1 at the outer periphery of the lower cut surface 1 and near the central axis O to each other and penetrating the target processing region T2, so that the target processing region T2 is divided by the cut surface 8 (i.e., one end of the cut surface 8 is connected to the outer periphery of the upper cut surface 2 and the lower cut surface 1, the other end of the cut surface 8 is connected to the central axis of the upper cut surface 2 and the lower cut surface 1 and penetrates the target processing region T2, and further the target processing region T2 having a doughnut-like shape forms a cut opening at the cut surface 8, wherein, as shown in fig. 6, the cut surface 8 has a planar structure, the cut surface 8 penetrating the target processing region T2 includes the cut surface 8 simultaneously cutting the upper cut surface 2 and the lower cut surface 1 to form a cut opening), thereby allowing the portion to be removed TR of the target processing region T2 to be easily removed from the removal cut 4.
To further facilitate the removal of the portion to be removed TR of the target processing region T2 from the removal cut 4, it is preferable to arrange the removal cut 4 and the cut surface 8 on opposite sides with respect to the central axis O of the target processing region T2 (i.e., the removal cut 4 is located on one side of the central axis O of the target processing region T2, and the cut surface 8 is located on one side of the central axis O of the target processing region T2 facing away from the removal cut 4), so that the portion to be removed TR of the target processing region T2 can be removed uniformly from the removal cut 4.
After the portion TR to be removed of the target treatment region T2 shown in fig. 6 and 7 is removed from the eye tissue E, the outer curvature of the eye tissue E (i.e., the cornea in the present embodiment) is changed (e.g., becomes more raised), thereby achieving the purpose of changing the curvature of the cornea to correct the vision. In other words, the target treatment area T2 shown in fig. 6 and 7 is an example of a target treatment area that needs to be removed from the cornea in order to correct hyperopia.
As is clear from the above description of the examples of target treatment regions T1, T2 generated in the ocular tissue E by the ocular tissue treatment method according to the embodiment of the present invention with reference to fig. 4 to 7, since the sharp-edged portion TE of the target treatment regions T1, T2 has been ablated by the femtosecond laser beam before removing the portion TR to be removed of the target treatment regions T1, T2, only the portion TR to be removed of the target treatment regions T1, T2 remains, and this portion TR to be removed is less likely to be broken during the removal of the target treatment regions T1, T2 of the ocular tissue E. Therefore, the portion of the ocular tissue to be subsequently removed (extracted) from the ocular tissue obtained by the ocular tissue treatment method according to the present invention has a characteristic of being not easily broken, so that the portion of the ocular tissue (e.g., cornea) to be removed (i.e., the portion TR to be removed of the target treatment region T1, T2) can be effectively prevented from being broken during the subsequent removal treatment.
In addition, since in the ocular tissue treatment method according to the present invention, the portion of the ocular tissue (e.g., cornea) to be removed (i.e., the portion TR to be removed of the target treatment region T1, T2) does not suffer from the problem of breakage during subsequent removal, the ocular tissue treatment method of the present invention does not require the additional compensation thickness to be provided to the target treatment region, compared to the prior art in which the breakage during removal is avoided by providing the additional compensation thickness to the target treatment region; therefore, according to the actual requirement of processing the eye tissue, the eye tissue processing method of the present invention can make the generated target processing region have a corresponding thickness, and the minimum value of the thickness may be zero. In other words, the method for treating eye tissue of the present invention can avoid the additional increase of the thickness (e.g., the compensation thickness in the prior art) of the target treatment regions T1 and T2 other than the thickness of the eye tissue to be treated (e.g., corrected), thereby achieving the purpose of maintaining the strength of the eye tissue to the maximum extent.
On the other hand, since the ocular tissue treatment method according to the present invention can produce target treatment regions T1, T2 having respective thicknesses without providing a compensation thickness, it can more accurately determine the ranges of target treatment regions T1, T2 necessary for treating (e.g., correcting) ocular tissue, so that the range that can be treated (e.g., the number of correctable degrees of vision) thereof is wider. For example, for the correction of the vision, if the maximum thickness of the removed target treatment regions T1 and T2 that the cornea can bear is DA, since the prior art must additionally provide the compensation thickness DH for the removed target treatment region, the corrected vision range is the range of the maximum thickness corresponding to DA-DH (the maximum thickness of the removed target treatment region that the cornea can bear minus the compensation thickness), in contrast, since the eye tissue treatment method according to the present invention does not need to provide any compensation thickness, the corrected vision range is the range of the maximum thickness corresponding to DA (the maximum thickness of the removed target treatment region that the cornea can bear).
Further, fig. 8 shows a schematic view of an ocular tissue treatment device 100 according to an embodiment of the present invention.
An eye tissue processing apparatus 100 provided by an embodiment of the present invention includes a laser light source 101, an optical system 102, an optical scanning movement device 103, a condenser lens 104, and a controller 105. The laser light source 101 is configured to generate a femtosecond laser beam; the optical system 102 is configured to guide the femtosecond laser beam generated by the laser light source 101; the optical scanning movement device 103 is configured to apply the femtosecond laser beam from the optical system 102 to the eye tissue E through the condenser lens 104; the controller 105 is connected with the laser light source 101, the optical system 102 and the optical scanning movement device 103, and the controller 105 is configured to control the laser light source 101, the optical system 102 and the optical scanning movement device 103 to generate target treatment regions T1, T2 (see fig. 4 to 7) in the eye tissue E. The ocular tissue treatment apparatus 100 according to the embodiment of the present invention further includes a removing device (not shown) configured to remove the portion to be removed TR of the target treatment regions T1, T2 from the ocular tissue E under the operation of a user (see fig. 4 to 7).
Specifically, the controller 105 is configured to control the laser light source 101 to generate the femtosecond laser beam, control the optical system 102 to guide the femtosecond laser beam to the optical scanning movement device 103, and control the optical scanning movement device 103 to generate the target treatment regions T1, T2 in the eye tissue E by the femtosecond laser beam through the condenser lens 104, the target treatment regions T1, T2 including a sharp edge portion TE and a portion to be removed TR, the sharp edge portion TE including a thickness taper, the thickness taper may have a minimum thickness tapered to a value of zero (i.e., the tapered thickness minimum of the thickness taper is zero), and the sharp edge portion TE is ablated by the femtosecond laser beam during generation of the target treatment regions T1, T2.
For more details of how controller 105 generates target treatment regions T1, T2 in ocular tissue E, reference may be made to the description of fig. 4-7 above, and further description is omitted here.
Likewise, in the ocular tissue treatment apparatus 100 according to the present invention, since the controller 105 has controlled the optical scanning movement device 103 to ablate the sharp edge portions TE of the target treatment regions T1 and T2 by the femtosecond laser beam before the removing device (not shown) removes the portions to be removed TR of the target treatment regions T1 and T2, only the portions to be removed TR remain in the target treatment regions T1 and T2, and the portions to be removed TR are less likely to be broken during the removal of the target treatment regions T1 and T2 of the ocular tissue E. Therefore, the portions (the portions to be removed TR of the target treatment regions T1, T2) to be subsequently removed (extracted) from the ocular tissue obtained by the ocular tissue treatment apparatus 100 according to the present invention have a characteristic of being not easily broken, and thus the problem of breakage of the portions of the removed ocular tissue (e.g., cornea) (i.e., the portions to be removed TR of the target treatment regions T1, T2) during the removal process can be effectively and certainly avoided.
In addition, in comparison with the prior art in which the additional compensation thickness is provided to avoid the breakage during the removal process, the eye tissue treatment apparatus 100 of the present invention performs the ablation process on the sharp-edged portions TE of the target treatment regions T1, T2, so as to only reserve the portions to be removed TR of the target treatment regions T1, T2, and the portions to be removed TR are not broken during the removal process by the removal device. This has the advantage that the ocular tissue treatment device 100 of the present invention does not require additional compensation thicknesses for the target treatment regions T1, T2; therefore, according to the actual requirement of processing the eye tissue, the controller 105 of the eye tissue processing apparatus 100 of the present invention can control the optical scanning moving device 103 to generate the target processing regions T1, T2 with corresponding thicknesses, and the minimum value of the thicknesses may be zero. In other words, the ocular tissue treatment device 100 of the present invention can avoid additionally increasing the thickness (e.g., the compensation thickness in the prior art) of the target treatment regions T1 and T2 other than the thickness of the ocular tissue necessary for treatment (e.g., correction), thereby achieving the purpose of maintaining the strength of the ocular tissue to the maximum extent.
On the other hand, also, since the ocular tissue treatment apparatus 100 according to the present invention can make the produced target treatment regions T1, T2 have respective thicknesses without setting a compensation thickness, it can more accurately decide the ranges of the target treatment regions T1, T2 necessary for treating (e.g., correcting) ocular tissue, so that the range that it can treat (e.g., correctable degrees of vision) is wider. This advantage is described in detail above and will not be described herein.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. An eye tissue treatment apparatus, comprising:
a laser light source configured to generate a femtosecond laser beam;
an optical system configured to guide the femtosecond laser beam generated by the laser light source;
an optical scanning movement device configured to apply the femtosecond laser beam from the optical system to an eye tissue through a condenser lens;
a controller connected with the laser light source, the optical system, and the optical scanning movement device, and configured to:
controlling the laser light source to generate the femtosecond laser beam;
controlling the optical system to direct the femtosecond laser beam to the optical scanning movement device; and
controlling the optical scanning moving device to generate a target processing area in the eye tissue by the femtosecond laser beam, wherein the target processing area comprises a sharp edge part and a part to be removed, and controlling the optical scanning moving device to ablate the sharp edge part by the femtosecond laser beam.
2. The ocular tissue treatment device according to claim 1, further comprising:
a removal device configured to remove the portion of the target treatment area to be removed from the ocular tissue.
3. The ocular tissue treatment device of claim 2, wherein, prior to the removal device removing the portion of the target treatment region from the ocular tissue, the controller is further configured to control the optical scanning movement device to make a removal cut in the ocular tissue, the removal cut being connected to the target treatment region from an outer surface of the ocular tissue;
wherein the removal device is configured to remove the portion of the target treatment area to be removed via the removal incision.
4. The ocular tissue treatment apparatus of any one of claims 1-3, wherein the controller controlling the optical scanning movement device to create the target treatment region in the ocular tissue by the femtosecond laser beam comprises:
creating an undercut in the ocular tissue;
ablating said sharp-edged portion of said target treatment area; and
creating an upper tangent plane in the eye tissue that is connected to the lower tangent plane.
5. The ocular tissue treatment device of claim 4, wherein the upper cut surface interconnects with an outer periphery of the lower cut surface; wherein the content of the first and second substances,
the sharp edge portion of the target treatment area includes where the upper tangent plane and the lower tangent plane join each other.
6. The ocular tissue treatment device of claim 4, wherein the upper cut surface interconnects with an outer periphery of the lower cut surface, and the upper cut surface interconnects with a central portion of the lower cut surface;
wherein the sharp edge portion of the target processing region includes a location where the upper tangent plane and the lower tangent plane are connected to each other; and is
Wherein the controller is further configured to control the optical scanning movement device to ablate and generate a cutting plane in the target processing region by the femtosecond laser beam, one end of the cutting plane is connected to the outer periphery of the upper and lower facets, and the other end is connected to the central axis of the upper and lower facets and penetrates through the target processing region.
7. The ocular tissue treatment device of claim 6, wherein the cut surface is planar in configuration, the cut surface extending through the target treatment area comprising: the cutting surface cuts the upper section and the lower section simultaneously to form a cut opening.
8. The ocular tissue treatment device of claim 6, wherein the controller is further configured to control the optical scanning movement device to make a removal cut in the ocular tissue, the removal cut being connected to the target treatment region from an outer surface of the ocular tissue, the removal cut being located on one side of a central axis of the target treatment region, and the cut surface being located on a side of the central axis of the target treatment region facing away from the removal cut.
9. The ocular tissue treatment device according to any one of claims 1 to 3, wherein the ocular tissue is a cornea or a crystal.
10. The ocular tissue treatment device according to any one of claims 1 to 3, wherein the sharp edge portion comprises a thickness taper, the taper thickness of the thickness taper having a minimum value of zero.
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| Application Number | Priority Date | Filing Date | Title |
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| TW109131187A TWI749760B (en) | 2020-09-10 | 2020-09-10 | Apparatus for treating ocular tissue |
| TW109131187 | 2020-09-10 |
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| CN114159226A true CN114159226A (en) | 2022-03-11 |
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| TWI784490B (en) * | 2021-04-21 | 2022-11-21 | 艾克夏醫療儀器股份有限公司 | Eye docking system for excimer laser ophthalmological apparatus and docking piece for said eye docking system |
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| TWI749760B (en) | 2021-12-11 |
| TW202210043A (en) | 2022-03-16 |
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