TWI759969B - Computer program for controlling eye-tissue processing equipment and computer readable medium recording the same - Google Patents

Abstract

The present invention relates to a computer program for controlling eye-tissue processing equipment. An eye-tissue processing equipment loading said computer program to execute the following steps: generating a femtosecond laser beam by a laser source; directing the femtosecond laser beam toward an eye tissue; zoning a target treatment area by the femtosecond laser beam, wherein the target treatment area includes a to-be-removed portion and a sharp-edged portion extending from the to-be-removed portion, the sharp-edged portion has a thickness tapering off from the side adjacent to the to-be-removed portion and is ablated by intensively applying the femtosecond laser beam thereon in the course of zoning the target treatment area; and removing the to-be-removed portion of the target treatment area from the eye tissue. The present invention also relates to a computer readable medium recording the aforesaid computer program.

Description

Computer programs and computer-readable media for controlling devices that process eye tissue

The present invention relates to a computer program and a computer-readable medium for controlling a device for processing eye tissue.

In order to achieve the purpose of correcting vision, there is a known method of using an excimer laser to change the curvature of the cornea of the eye, which may be called Laser Vision Correction (LVC). Among the laser vision correction methods, the most common is excimer laser in situ lamellar orthokeratology (LASIK), which accounts for approximately 85% of all laser vision correction methods.

In the early days of LASIK surgery, doctors usually used a physical blade (also known as a microkeratome) to cut a corneal flap on the cornea, then opened the corneal flap, and then used a laser to cut the exposed corneal tissue to change the cornea. radian. In recent years, with regard to the method of cutting corneal flaps on the cornea, a method using femtosecond laser has also been developed, which uses thousands of laser pulses to generate a photo-splitting effect to form extremely tiny point-like vacuoles. The tissue separates to form a corneal flap. This method of utilizing femtosecond lasers has been increasingly used in LASIK surgery as it offers greater safety, repeatability, predictability, and flexibility than microkeratotomy devices. to form a corneal flap. In addition, the use of femtosecond lasers can also reduce the adverse complications of iatrogenic keratoconus (steep cornea), flap displacement (flat cornea), and irregular corneal flaps associated with microkeratotomy probability.

However, in LASIK surgery, due to the large incision of the corneal flap, it is difficult for the corneal flap to support the cornea to resist the strength of the intraocular pressure after the operation, thus greatly weakening the strength of the cornea after the operation.

In addition to LASIK surgery, another method of laser vision correction by femtosecond laser has been developed in recent years. A minimally invasive incision removes (removes) the corneal lens from the corneal tissue, thereby altering the curvature of the cornea. In this method, since there is no need to create a corneal flap with a larger incision, the problem of corneal flap displacement after surgery can be avoided, and the strength of the cornea will not be excessively weakened.

With regard to a method of removing (removing) a corneal lens, it is known to use a femtosecond laser to form a corneal lens by incising two planes in the intact corneal tissue, the two planes including an upper plane that follows the outer shape of the cornea ( called Cap) and a lower section (called Curvature) with a higher curvature than the upper section. Next, a femtosecond laser is used to make another incision at the outer periphery of the incision plane of the corneal lens to generate a minimally invasive incision through the corneal surface, so that the corneal lens can be taken out from the corneal tissue through the minimally invasive incision. As such, after removal of the corneal lens, the outer curvature of the cornea changes by the diopter necessary to correct the refractive error of the eye (correct visual acuity).

US Patent No. 10682256 discloses a technique for a method of removing a corneal lens, wherein, in order to avoid breakage of the corneal lens (especially the edge portion of the corneal lens) during removal from the corneal tissue, the upper cut surface of the corneal lens must be A compensation thickness DH is set between the lower cut surface to increase the strength of the edge portion of the corneal lens. However, as shown in Figures 5A and 5B, the method of setting the compensation thickness DH between the upper and lower cutting planes results in an increase in the thickness of the removed (extracted) corneal lens, so that the remaining cornea is The total thickness will become thinner after surgery, which is less conducive to the strength of the cornea against intraocular pressure.

Therefore, the present invention provides a computer program for controlling an ocular tissue processing device, which is used to control an ocular tissue processing device, which can advantageously overcome when removing ocular tissue such as the cornea. The aforementioned problems in the prior art, while achieving the advantageous technical effect of maintaining the strength of the ocular tissue and avoiding partial rupture of the removed (extracted) ocular tissue.

The device for treating eye tissue is executed by the computer program for controlling the device for treating eye tissue and includes the following steps: generating a femtosecond laser beam from a laser light source; directing the femtosecond laser beam toward an eye tissue; A target treatment area is generated in the eye tissue by the femtosecond laser beam, wherein the target treatment area includes a portion to be removed, and a sharp-edged portion extending from the portion to be removed, the sharp-edged portion having a minimum thickness that tapers from adjacent the portion to be removed to a value of zero, wherein the sharp-edged portion is ablated by intensively applying the femtosecond laser beam during creation of the target treatment area; and removing the to-be-removed portion of the target treatment area from the ocular tissue.

Before removing the to-be-removed portion of the target treatment area, the sharp-edged portion of the target treatment area is ablated by the femtosecond laser beam, so that only the to-be-removed remains in the target treatment area The portion needs to be removed from the ocular tissue, and the portion to be removed does not rupture during removal from the ocular tissue. Therefore, the problem of rupture of the removed (extracted) portion of the ocular tissue in the prior art can be avoided.

Furthermore, the problem of rupture of the removed (extracted) portion of the ocular tissue is avoided by providing an additional compensating thickness as in the prior art. According to the actual needs of treating the eye tissue, the present invention can make the generated target treatment area have a corresponding thickness, and the minimum value of the thickness may be zero. In other words, the present invention can avoid additionally increasing the thickness of the target treatment area required to treat (eg, correct) the ocular tissue, thereby maximizing the maintenance of the strength of the ocular tissue.

Further, before removing the to-be-removed portion of the target treatment area from the ocular tissue, making a removal incision in the ocular tissue by the femtosecond laser beam, wherein the removal A removal incision is connected to the target treatment area from the outer surface of the ocular tissue, and the portion of the target treatment area to be removed is removed from the ocular tissue via the removal incision.

Further, generating the target treatment area in the ocular tissue by the femtosecond laser beam includes: generating a cut surface in the ocular tissue; ablating the sharp edge by intensively applying the femtosecond laser beam an edge portion; and creating an upper cut surface in the eye tissue connected to the lower cut surface, so that the sharp edge portion has a minimum thickness tapered to a value of zero, and creates the to-be-removed portion.

Further, the upper cut surface and the lower cut surface are connected to each other at an outer periphery of the lower cut surface, and the sharp-edged portion includes the interconnection of the upper cut surface and the lower cut surface at the outer periphery of the lower cut surface, so that the to-be-removed The portion is located in the center of the target treatment area, and the sharp-edged portion has a minimum thickness that tapers to zero from the outer periphery of the adjacent portion to be removed toward the lower cut surface.

Further, the upper cut surface and the lower cut surface are connected to each other at the outer periphery of the lower cut surface and a portion close to a central axis of the eye tissue; wherein, the sharp edge portion of the target treatment area includes a portion located on the upper cut surface and the eye tissue. The lower section is located at the interconnection of the outer periphery of the lower section, and at the interconnection of the upper section and the lower section at the part of the lower section close to the central axis; and, by the femtosecond laser beam Generating the target treatment area in the eye tissue also includes ablating a cut surface, the cut surface connecting the upper cut surface and the lower cut surface at the interconnection of the outer periphery of the lower cut surface, and the upper cut surface and the lower cut surface. The tangent planes are at the interconnection of the parts of the lower tangent plane close to the central axis and run through the target treatment area.

Further, the cut surface is located on the opposite side of the removal cut with respect to the central axis of the target treatment area.

Further, the ocular tissue is the cornea or the lens.

The present invention is also a computer-readable medium for controlling the device for processing eye tissue, which stores the aforementioned computer program for controlling the device for processing eye tissue.

1: lower section

2: top section

4: Remove the incision

8: cut surface

100: Equipment for Handling Eye Tissue

101: Laser light source

102: Optical system

103: Optical scanning mobile device

104: Condenser

105: Controller

DH: compensated thickness

E: eye tissue

O: center axis

S101~S104: Steps

T1, T2: target processing area

TE: Sharp edge part

TR: section to be removed

[Figure 1] is a flowchart of removing eye tissue by a device for treating eye tissue in an embodiment of the present invention.

[Second Figure A] is a front view of generating a target treatment area in eye tissue in an embodiment of the present invention.

[Second Figure B] is a cross-sectional view of the second Figure A.

[Third Figure A] is a front view of another target treatment area created in eye tissue in an embodiment of the present invention.

[The third picture B] is a cross-sectional view of the third picture A.

[FIG. 4] is a schematic diagram of a device for treating eye tissue in an embodiment of the present invention.

[FIG. 5A] is a schematic cross-sectional view of the prior art producing a corneal lens in the cornea.

[FIG. 5B] is a schematic cross-sectional view of the prior art producing another morphological corneal lens in the cornea.

Embodiments of the present invention will hereinafter be described with reference to the accompanying drawings. In the following description, constituent elements having substantially the same function and arrangement are denoted by the same reference numerals, and repeated description is made only when necessary.

First, in this embodiment, a computer program for controlling an eye tissue processing device is used to control an eye tissue processing device 100 (refer to FIG. 4 ), so that the eye tissue processing device 100 can treat an eye tissue E (refer to FIG. 4 ). The second picture B and the third picture B) are processed, and the computer program can be stored on a computer-readable medium. live. In the following description of the embodiments of the present invention, the cornea is used as an example of the ocular tissue E for description, but it is not limited thereto, and the ocular tissue E can also be different ocular tissues such as a lens.

As shown in Figure 1, Figure 2 B and Figure 3 B, the eye tissue processing apparatus 100 (see Figure 4 ) processes the eye tissue E according to the following steps S101 to S104 after receiving the computer program. First, in step S101, a femtosecond laser beam is generated from a laser light source 101 (refer to FIG. 4). Next, in step S102 , the femtosecond laser beam is directed toward the eye tissue E. Next, in step S103, a target treatment area T1, T2 is generated in the eye tissue E by the femtosecond laser beam, and the target treatment area T1, T2 includes a sharp edge portion TE and a to-be-removed portion The portion TR, the sharp-edged portion TE extends from the to-be-removed portion TR, and the sharp-edged portion TE may have a minimum thickness tapering from the adjacent to-be-removed portion TR to a value of zero. More details about the target processing regions T1 and T2 will be described later with reference to the second A to the third B diagram. Finally, in step S104, the to-be-removed portion TR of the target treatment area T1, T2 is removed from the eye tissue E.

Examples of the two target treatment regions T1 and T2 generated in the eye tissue E in the embodiment of the present invention will be described below with reference to the second diagram A to the third diagram B. FIG.

The second figure A and the second figure B show an example of a target treatment area T1 generated in the eye tissue E according to the embodiment of the present invention.

Referring to the second picture A and the second picture B, the target treatment area T1 generated in the eye tissue E includes: first, a section 1 is generated in the eye tissue E by the femtosecond laser beam, and then Ablating the sharp-edged portion TE of the target treatment area T1 by the femtosecond laser beam, and finally generating an upper portion connected to the lower section 1 in the eye tissue E by the femtosecond laser beam Cut 2. After the target processing region T1 is processed in this way, the sharp-edged portion TE has been ablated by the femtosecond laser beam to form bubbles, and only the to-be-removed portion TR remains. Due to the high directivity of the laser, the sharp edge is ablated The method of dividing TE is to apply the femtosecond laser beam densely to the sharp edge portion TE, so that the femtosecond laser beam can ablate the sharp edge portion TE.

In the example shown in the second picture A and the second picture B, the upper section 2 and the lower section 1 generated by the femtosecond laser beam are connected to each other at the outer periphery of the lower section 1, and thus, The sharp-edged portion TE of the target treatment area T1 includes the connection between the upper cut surface 2 and the lower cut surface 1 at the outer periphery of the lower cut surface 1, so that the to-be-removed portion TR is located in the center of the target treatment area T1 , the sharp-edged portion TE has a minimum thickness that tapers to zero from the adjacent portion TR to be removed toward the outer periphery of the lower cut surface 1 .

In addition, in order to remove the to-be-removed portion TR of the target treatment region T1 from the ocular tissue E, the embodiment of the present invention further includes manufacturing a femtosecond laser beam in the ocular tissue E The removal incision 4 is located at the outer periphery of the upper section 2 and is connected to the upper section 2 from the outer surface of the ocular tissue E, and therefore, the removal incision 4 is also associated with the target treatment area T1 is connected. In this way, the to-be-removed portion TR of the target treatment region T1 can be removed from the eye tissue E through the removal incision 4 .

After the to-be-removed portion TR of the target treatment region T1 is removed from the ocular tissue E, the outer curvature of the ocular tissue E (ie, the cornea in this embodiment) may be changed (eg, changed to It is relatively smooth), so as to achieve the purpose of changing the curvature of the cornea to correct vision. In other words, the target treatment area T1 shown in the second picture A and the second picture B is an example of the target treatment area that needs to be removed from the cornea in order to correct myopia.

The third A and the third B show an example of another target treatment area T2 generated in the eye tissue E according to the embodiment of the present invention.

Referring to the third figure A and the third figure B, the target treatment area T2 is generated in the eye tissue E in a similar manner to the target treatment area T1 shown in the second A and the second B figure. The difference between them is that, in the example shown in the third A and the third B, the undercut 1 first generated by the femtosecond laser beam has a shape similar to W, and therefore , the upper section 2 and the lower section 1 generated by the femtosecond laser beam are connected to each other at a part close to a central axis O of the eye tissue E, in addition to the outer periphery of the lower section 1 (refer to the third figure B), and therefore, the sharp-edged portion TE of the target treatment area T2 includes a position at the interconnection of the upper cut surface 2 and the lower cut surface 1 at the outer periphery of the lower cut surface 1, and a position at The upper cut surface 2 and the lower cut surface 1 are connected to each other at the part of the lower cut surface 1 close to the central axis O. More specifically, the sharp-edged portion TE of the target processing area T2 also includes turning points located on both sides of the lower cut surface 1 of the W-shape. The sharp-edged portions TE of the target processing region T2 are all ablated by the femtosecond laser beam to be bubbled.

Furthermore, in order to remove the to-be-removed portion TR of the target treatment area T2 from the ocular tissue E, the removal of the to-be-removed portion of the target treatment area T1 from the ocular tissue E is similar to that described above Part TR, embodiments of the present invention also include 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 plane 2 and extending from the The outer surface of the ocular tissue E is connected to the upper cut surface 2, and thus, the removal incision 4 is also connected to the target treatment area T2. In this way, the to-be-removed portion TR of the target treatment area T2 can be removed from the ocular tissue E through the removal incision 4 .

However, in the example shown in the third A and the third B, since the upper cut surface 2 and the lower cut surface 1 of the target processing area T2 are connected to each other at the outer periphery of the lower cut surface 1, they are also connected to each other. Parts close to the central axis O are connected to each other (refer to Figure 3 B), and the target treatment area T2 has a doughnut-like shape when viewed from the direction of the front view of Figure 3 A. In this case, if you want to To remove the to-be-removed portion TR of the target treatment region T2 from the removal incision 4, it is also necessary to additionally ablate a section 8 in the eye tissue E by the femtosecond laser beam (see the third A), the cut surface 8 connects the upper cut surface 2 and the lower cut surface 1 of the target processing area T2 at the mutual connection of the outer periphery of the lower cut surface 1, and the upper cut surface 2 and the lower cut surface 1 are in the The lower section 1 is close to the central axis O at the interconnection of the parts, and penetrates the target processing area T2, so that the target processing area T2 is separated by the cut surface 8, so that the target processing area T2 to be removed The part TR can be easily removed from this removal cut 4 .

In order to further facilitate the removal of the to-be-removed portion TR of the target treatment area T2 from the removal incision 4, it is preferable to make the removal incision 4 and the cut surface 8 relative to the target treatment area T2 The central axis O of is located on the opposite side, so that the to-be-removed portion TR of the target treatment region T2 can be uniformly removed from the removal cut 4 .

After the to-be-removed portion TR of the target treatment region T2 shown in the third A and the third B image is removed from the eye tissue E, the eye tissue E (that is, the The outer curvature of the cornea) is altered (eg, becomes more convex), thereby changing the curvature of the cornea to correct vision. In other words, the target treatment area T2 shown in the third A and the third B image is an example of the target treatment area that needs to be removed from the cornea in order to correct hyperopia.

It can be clearly understood from the above description of the examples of the target treatment areas T1, T2 generated in the ocular tissue E for the embodiment of the present invention with reference to the second A to the third B Before removing the to-be-removed portion TR of the target processing area T1, T2, the sharp edge portion TE of the target processing area T1, T2 has been ablated by the femtosecond laser beam, leaving only the target The to-be-removed portions TR of the treatment regions T1, T2 are less likely to be broken during the process of removing the target treatment regions T1, T2 of the ocular tissue E. Therefore, the present invention can effectively The problem of rupture of the removed portion of the ocular tissue E (eg, cornea) (ie, the target treatment area T1 , T2 ) during removal is avoided.

Besides, in the present invention, the removed part of the ocular tissue E (eg, the cornea) will not rupture during the removal process, compared with the prior art by treating the target Additional compensation thickness is set in the area to avoid the problem of rupture during the removal process. The present invention does not need to set additional compensation thickness for the target treatment areas T1 and T2. Therefore, according to the actual needs of processing the eye tissue E, In the present invention, the target processing regions T1 and T2 can be generated to have corresponding thicknesses, and the minimum value of the thicknesses may be zero. In other words, the present invention can avoid additionally increasing the thickness (eg, the compensation thickness in the prior art) other than the thicknesses of the target treatment regions T1 and T2 necessary for the treatment (eg, correction) of the eye tissue E, thereby maximizing the The purpose of maintaining the strength of the ocular tissue E is achieved.

On the other hand, since the present invention can make the target treatment regions T1 and T2 to have corresponding thicknesses without setting compensation thicknesses, it can more accurately determine the necessary treatment (for example, correcting) the ocular tissue E. The range of the target processing area T1 and T2 makes its processable range (for example, correctable visual acuity) wider. For example, for vision correction, if the maximum thickness of the removed target treatment area that the cornea can bear is DA, since the prior art must additionally set a compensation thickness DH for the removed target treatment area, the range of vision that can be corrected by the cornea The maximum thickness is equivalent to the range of DA-DH (the maximum thickness of the removed target treatment area that the cornea can bear minus the compensation thickness). In contrast, since the present invention does not need to set any compensation thickness, it can The corrected visual acuity range is the range in which the maximum thickness corresponds to DA (the maximum thickness of the target treatment area T1, T2 that the cornea can withstand for removal).

FIG. 4 is a schematic diagram of a device 100 for treating eye tissue according to an embodiment of the present invention.

The eye tissue treatment device 100 according to the embodiment of the present invention includes the laser light source 101 configured to generate the femtosecond laser beam; an optical system 102 configured to guide the laser light source 101 the generated femtosecond laser beam; an optical scanning moving device 103 configured to apply the femtosecond laser beam from the optical system 102 to the eye tissue E through a condenser 104; and a controller 105, Connected with the laser light source 101 , the optical system 102 and the optical scanning moving device 103 , and configured to control the laser light source 101 , the optical system 102 and the optical scanning moving device 103 , so as to scan the eye tissue E The target processing regions T1, T2 are generated (see the second A to the third B). The eye tissue treatment device 100 according to the embodiment of the present invention further includes a removing device (not shown in the figure), which is configured to remove the target treatment area T1, The to-be-removed portion TR of T2 (see the second A to the third B).

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 direct the femtosecond laser beam to the optical scanning moving device 103 , and control the optical scanning The mobile device 103 generates the target treatment area T1, T2 in the eye tissue E by passing the femtosecond laser beam through the condenser 104, and the target treatment area T1, T2 includes the sharp-edged portion TE and the to-be-removed portion TR, the sharp-edged portion TE may have a minimum thickness tapered to a value of zero, and the sharp-edged portion TE is burned by intensively applying the femtosecond laser beam during the creation of the target treatment regions T1, T2 eclipse.

For more details on how the controller 105 generates the target treatment regions T1 and T2 in the eye tissue E, reference may be made to the descriptions of the second A to the third B images above, which will not be repeated here.

Likewise, in the device 100 for treating eye tissue of the present invention, since the controller 105 removes the to-be-removed portion TR of the target treatment area T1, T2 by the removing device (not shown in the figure), the controller 105 The optical scanning moving device 103 has been previously controlled to ablate the sharp edge portions TE of the target processing regions T1 and T2 by the femtosecond laser beam, so that only the to-be-removed portion remains in the target processing regions T1 and T2 TR, Therefore, the to-be-removed portion TR is less likely to be broken during the process of removing the target treatment area T1, T2 of the eye tissue E. Therefore, the ocular tissue processing device 100 of the present invention can effectively avoid the removed part of the ocular tissue E (eg, the cornea) (ie, the target processing area T1, T2) during the removal process The cracking problem occurs.

In addition, since in the ocular tissue processing apparatus 100 of the present invention, the removed portion of the ocular tissue E (eg, the cornea) will not rupture during the removal process by the removal device, Compared with the prior art by setting an additional compensation thickness for the target treatment area to avoid the problem of rupture during removal, the ocular tissue treatment device 100 of the present invention does not need to set the target treatment area T1 and T2 Additional compensation thickness, therefore, according to the actual needs of treating eye tissue, the controller 105 of the eye tissue treating apparatus 100 of the present invention can control the optical scanning moving device 103 to make the generated target treatment areas T1, T2 has a corresponding thickness, and the minimum value of this thickness may be zero. In other words, the device 100 for treating eye tissue of the present invention can avoid additionally increasing the thickness of the target treatment area T1, T2 necessary for treating (eg, correcting) the eye tissue E (eg, in the prior art) compensating thickness), so as to achieve the purpose of maintaining the strength of the ocular tissue E to the greatest extent.

On the other hand, also, since the device 100 for treating eye tissue according to the present invention can make the generated target treatment regions T1, T2 have corresponding thicknesses without setting compensation thicknesses, it can more accurately determine the treatment (eg, , correction) the range of the target treatment area T1 and T2 necessary for the eye tissue E, so that the range of its treatment (for example, the correctable degree of visual acuity) is wider. This advantage has been described in detail above, and will not be repeated here.

The drawings of the embodiments described herein are intended to provide an understanding of the invention. In other words, the drawings are representative only and may not be drawn to scale. Some scales in the drawings may be exaggerated, while other scales may be reduced. Accordingly, the drawings are to be regarded as illustrative rather than restrictive.

Although various embodiments of the present invention have been described in the above-mentioned embodiments with reference to the accompanying drawings, the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention to the above-mentioned descriptions and those shown in the accompanying drawings. features and structure shown. It should be understood that various other omissions, substitutions, changes and modifications that can be conceived by those skilled in the art without departing from the scope of the invention are also included within the scope of the invention.

S101~S104: Steps

Claims (10)

A computer program for controlling a device for treating eye tissue, for controlling a device for treating eye tissue so that the device for treating eye tissue performs the following steps: generating a femtosecond laser beam from a laser light source; directing the femtosecond laser beam A laser beam is directed towards an eye tissue; a target treatment area is generated in the eye tissue by the femtosecond laser beam, wherein the target treatment area includes a portion to be removed and extends from the portion to be removed of a sharp-edged portion having a minimum thickness that tapers from the adjacent portion to be removed to a value of zero, wherein the sharp-edged portion is produced by intensively applying the ablated by a femtosecond laser beam; and removing the portion to be removed of the target treatment area from the ocular tissue. The computer program for controlling an ocular tissue treatment device as claimed in claim 1, further comprising: prior to removing the to-be-removed portion of the target treatment area from the ocular tissue, applying the femtosecond laser beam to the eye tissue A removal incision is made in eye tissue, wherein the removal incision is connected from the outer surface of the eye tissue to the target treatment area, and the portion of the target treatment area to be removed is removed from the target treatment area via the removal incision Eye tissue removed. The computer program for controlling an ocular tissue treatment device as claimed in claim 1, wherein generating the target treatment region in the ocular tissue by the femtosecond laser beam comprises: generating a slice in the ocular tissue; Ablating the sharp-edged portion by intensively applying the femtosecond laser beam; and creating an upper section in the eye tissue that is connected to the lower section, so that the sharp-edged section has a taper to a value of zero Minimum thickness and produce the part to be removed. The computer program for controlling a device for treating eye tissue as claimed in claim 3, wherein the upper cut surface and the lower cut surface are connected to each other at an outer periphery of the lower cut surface, and the sharp-edged portion includes the The upper cut surface and the lower cut surface are connected to each other at the outer periphery of the lower cut surface, so that the part to be removed is located in the center of the target processing area, and the sharp edge part is from the adjacent part to be removed toward the lower cut surface The outer perimeter has a minimum thickness that tapers to a value of zero. The computer program for controlling an ocular tissue treatment device of claim 4, further comprising: prior to removing the portion to be removed of the target treatment region from the ocular tissue, applying the femtosecond laser beam to the eye tissue A removal incision is made in eye tissue, wherein the removal incision is connected from the outer surface of the eye tissue to the target treatment area, and the portion of the target treatment area to be removed is removed from the target treatment area via the removal incision Eye tissue removed. The computer program for controlling a device for treating eye tissue as claimed in claim 3, wherein the upper cut surface and the lower cut surface are connected to each other at the outer periphery of the lower cut surface and a portion close to a central axis of the eye tissue; wherein, The sharp-edged portion of the target treatment area includes a connection between the upper cut surface and the lower cut surface at the outer periphery of the lower cut surface, and a portion of the upper cut surface and the lower cut surface near the central axis at the lower cut surface. and, generating the target treatment area in the eye tissue by the femtosecond laser beam also includes ablating a cut surface connecting the upper cut surface and the lower cut surface in the The connection between the outer peripheral edges of the lower cut surface and the connection between the upper cut surface and the lower cut surface at the part of the lower cut surface close to the central axis, and penetrate the target treatment area. The computer program for controlling an ocular tissue treatment device of claim 6, further comprising: prior to removing the to-be-removed portion of the target treatment region from the ocular tissue, applying the femtosecond laser beam to the eye tissue A removal incision is made in eye tissue, wherein the removal incision is connected from the outer surface of the eye tissue to the target treatment area, and the portion of the target treatment area to be removed is removed from the target treatment area via the removal incision Eye tissue removed. The computer program for controlling an ocular tissue treatment device as claimed in claim 7, wherein the cut surface is located on the opposite side of the removal incision relative to the central axis of the target treatment area. The computer program for controlling a device for treating eye tissue as claimed in claim 1, wherein the eye tissue is a cornea or a lens. A computer-readable medium for controlling an eye tissue processing device stores a computer program for controlling an eye tissue processing device according to any one of claim 1 to claim 9.

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