Ciliary sulcus locator

Abstract

Disclosed is a ciliary sulcus locator, which includes: a guiding tube in a straight tube structure, inside which a puncture needle is adapted to be inserted; the guiding tube has a front end as an insertion end and a rear end relative to the front end; the front end has a front opening for the puncture needle to pass through, and the rear end has a rear opening for the puncture needle to penetrate into; scale marks are further provided on the tube wall of the guiding tube; an indicating needle connected to the guiding tube to move together; the indicating needle has an indicating end adjacent to the front end of the guiding tube; a light-emitting part that can be manipulated to emit light is provided at the indicating end; the distance between the indicating end of the indicating needle and the front end is 1-5 mm; the whole of the indicating needle extends forward together with the guiding tube, and an interval opening for the iris to be clamped between the indicating needle and the guiding tube is formed by the interval between the indicating end of the indicating needle and the front end of the guiding tube.

Description

Technical Field

[0001] The present application relates to the field of ophthalmic therapeutic instruments, and in particular to a ciliary sulcus locator. Background Art

[0002] At present, during the intraocular lens suture fixation surgery, ophthalmologists need to insert the puncture needle into the ciliary sulcus on the inner surface of the iris root, introduce the suture, and ligate and fix the intraocular lens haptic in the ciliary sulcus. However, during the actual operation, due to the obstruction of the iris, the ciliary sulcus cannot be directly observed, and the puncture needle cannot be accurately inserted into the ciliary sulcus under direct vision. Therefore, the puncture operation can only be completed by relying on clinical experience to roughly estimate the position of the ciliary sulcus. This results in a low chance of accurately inserting the needle into the ciliary sulcus, and a high surgical risk.

[0003] If the puncture point is forward, the puncture needle is likely to damage the iris and cause complications such as iris bleeding, angle closure, and secondary glaucoma. If the puncture point is backward, it is easy to damage the blood vessels in the ciliary body and cause massive bleeding in the eye.

[0004] Therefore, there is an urgent need in clinical practice for a locator that can accurately locate the ciliary sulcus to guide the puncture needle to accurately penetrate the ciliary sulcus, thereby reducing surgical risks. Summary of the invention

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A ciliary sulcus locator, comprising:

[0007] A guide tube with a straight tube structure, the interior of which is used to insert a puncture needle; the guide tube has a front end as an insertion end and a rear end relative to the front end; the front end has a front opening for the puncture needle to pass out, and the rear end has a rear opening for the puncture needle to enter; the tube wall of the guide tube is also provided with a scale mark;

[0008] An indicator needle connected to the guide tube and moving together with the guide tube; the indicator needle has an indicator end adjacent to the front end of the guide tube; the indicator end is provided with a light portion that can be manipulated to emit light; the indicator end of the indicator needle and the front end are spaced 1 to 5 mm apart; the indicator needle as a whole extends forward together with the guide tube, and the indicator end of the indicator needle and the front end of the guide tube are spaced apart to form a spacing opening for the iris to be inserted into the indicator needle and the guide tube.

[0009] Preferably, the bright portion includes a reflector disposed at the indicating end and / or an optical fiber passing through the indicating needle or attached to the outer surface of the indicating needle; the optical fiber is separated from the indicating needle and extends at a position adjacent to the rear end of the indicating needle to match the light source; and the front end of the optical fiber is disposed adjacent to the reflector.

[0010] Preferably, the indicating needle has a main body section parallel to the guiding tube, and the indicating end is arranged at the front end of the main body section; a bent section for connecting the guiding tube is further provided at the rear end of the main body section; the connection position between the bent section and the guiding tube is more than 5 mm away from the front end of the guiding tube.

[0011] Preferably, the rear end of the indicating needle is directly connected to the outer tube wall of the guiding tube, or an operating part is fixedly connected to the guiding tube, and the rear end of the indicating needle is fixedly connected to the operating part.

[0012] Preferably, the outer diameter of the indicating needle is smaller than that of the guiding tube, and the outer diameter of the indicating needle is between 0.05 mm and 2 mm. Further, the outer diameter of the indicating needle is between 0.05 mm and 0.8 mm.

[0013] Preferably, the indicating needle is made of an elastic metal material and is configured to return to its original shape after the external force is removed after deformation.

[0014] Preferably, the indicating end does not extend beyond the front end of the guiding tube forward; along the length direction of the guiding tube, the indicating end of the indicating needle is within 5 mm from the front end of the guiding tube. Further, along the length direction of the guiding tube, the indicating end of the indicating needle is flush with the front end of the guiding tube or the two are 1-3 mm apart.

[0015] Preferably, the light source is a pulsed light generator.

[0016] Preferably, the operating part includes a handle part and a connecting rod; the connecting rod is obliquely connected to the guiding tube, a handle interface is further provided at the end of the connecting rod away from the guiding tube, and the handle part is connected to the handle interface.

[0017] Preferably, an arc-shaped support body is attached to the front end of the guiding tube, and the rear end opening of the guiding tube is an oblique opening; the orientation of the indicating end is parallel to the guiding tube, or the indicating end is an upwardly curved structure arranged on the main body section.

[0018] The ciliary sulcus locator of the present disclosure is provided with an indicating needle and is inserted into the anterior chamber of the eye from one side of the eyeball. The iris is clamped between the indicating needle and the guiding tube through the spacer opening. The indicating needle moves forward along the anterior surface (outer surface) of the iris, and the guiding tube continues to move forward on the posterior surface of the iris until the bright part of the indicating end approaches the peripheral part of the iris and the cornea. At this time, the front end opening of the guiding tube is aligned with the ciliary sulcus (the ciliary sulcus is located between the iris and the ciliary process), thereby realizing the positioning of the ciliary sulcus and guiding the puncture needle to accurately penetrate into the ciliary sulcus, so as to reduce the surgical risk.

[0019] Reference is made to the following description and the accompanying drawings, which disclose in detail specific embodiments of the present invention and indicate the ways in which the principles of the present invention may be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby.

[0020] Features described and / or illustrated for one embodiment may be used in the same or similar way in one or more other embodiments, combined with features in other embodiments, or replace features in other embodiments.

[0021] It should be emphasized that the term "comprising / including" as used herein refers to the presence of features, wholes, steps or components, but does not exclude the presence or addition of one or more other features, wholes, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 is a schematic structural diagram of a ciliary sulcus locator according to an embodiment of the present disclosure;

[0024] Figure 2 is Figure 1 another view of

[0025] Figure 3 is Figure 1 a schematic diagram of the usage state of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to enable those skilled in the art of the present technology to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0027] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] The terms "near", "far", "front", and "back" used in the present disclosure are relative to the clinician who manipulates the ciliary sulcus locator. The terms "near" and "back" refer to the portion relatively close to the clinician, and the terms "far" and "front" refer to the portion relatively far from the clinician. For example, the extracorporeal portion is at the proximal and rear end, and the intervening intracorporeal portion is at the distal and front end.

[0030] See also Figure 1 , Figure 2 , Figure 3 An embodiment of the present disclosure provides a ciliary sulcus locator 01, which includes: a guide tube 02 in a straight tube structure, and an indicator needle 05 connected to the guide tube 02 and moving together. The guide tube 02 is a hollow tube, and the interior of the guide tube 02 is used to insert a puncture needle. The guide tube 02 has a front end as an insertion end and a rear end relative to the front end. The front end of the guide tube 02 has a front end opening 08 for the puncture needle to pass through, and the rear end of the guide tube 02 has a rear end opening 09 for the puncture needle to penetrate.

[0031] The wall of the guide tube 02 is also provided with a scale mark 10. The scale mark 10 is used to determine the length of the guide tube entering the eye. The front end of the guide tube 02 is attached with an arc-shaped support body 07. The support body 07 is used to increase the contact area between the front end of the guide tube 02 and the human tissue to prevent the front end of the guide tube 02 from piercing the tissue inside the eye. The rear end opening 09 of the guide tube 02 is an oblique opening that is roughly perpendicular to the plane where the guide tube 02 and the operating part are located, and the rear end opening 09 is inclined upward (facing the Figure 1 The inclined surface of the rear opening 09 faces upward (toward the ceiling) for easy observation and operation.

[0032] In this embodiment, the indicating needle 05 has an indicating end 12 adjacent to the front end of the guiding tube 02. The indicating end 12 of the indicating needle 05 is spaced 1-5 mm from the front end. Further, the indicating end 12 of the indicating needle 05 is spaced 1.52-4.83 mm from the front end. Still further, the indicating end 12 of the indicating needle 05 is spaced 2.327-3.574 mm from the front end. The indicating needle 05 extends forward together with the guiding tube 02 as a whole, and an interval opening 25 is formed by the spacing between the indicating end 12 of the indicating needle 05 and the front end of the guiding tube 02 for the iris 14 to be clamped between the indicating needle 05 and the guiding tube 02.

[0033] The ciliary sulcus locator 01 of this embodiment is inserted into the anterior chamber of the eye from one side of the eyeball by providing an indicating needle 05. The iris is clamped between the indicating needle 05 and the guiding tube 02 through the interval opening 25. The indicating needle 05 moves forward along the front surface (outer surface) of the iris 14, and the guiding tube 02 continues to move forward on the rear surface of the iris 14 until the light portion of the indicating end 12 approaches the peripheral part of the iris and the cornea. At this time, the front end opening 08 of the guiding tube 02 is aligned with the ciliary sulcus 15 (the ciliary sulcus 15 is located between the iris 14 and the ciliary process 20), thereby realizing the positioning of the ciliary sulcus 15 and guiding the puncture needle 16 to accurately penetrate into the ciliary sulcus 15, so as to reduce the surgical risk.

[0034] It should be noted that any numerical value in the present disclosure includes all values from the lower limit value to the upper limit value increasing by one unit at a time, as long as there is an interval of at least two units between any lower value and any higher value.

[0035] For example, it is described that the indicating end 12 of the indicating needle 05 is spaced 1-5 mm from the front end, preferably 1.52-4.83 mm, and more preferably 2.327-3.574 mm, for the purpose of illustrating values such as 2.328 mm, 2.845 mm, 2.9 mm, 2.95 mm, 3.157 mm, 3.391 mm, 3.5 mm, etc. that are not explicitly listed above.

[0036] As described above, the example range with an interval unit of 0.1 does not exclude an increase with an appropriate unit such as 0.01, 0.02, 0.03, 0.04, 0.05, etc. These are merely examples intended to be clearly expressed, and it can be considered that all possible combinations of the numerical values listed between the lowest value and the highest value are clearly described in this specification in a similar manner.

[0037] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0038] For other limitations on the numerical range appearing in this article, please refer to the above description and will not be repeated here.

[0039] During ophthalmic surgery, the patient lies flat with his eyes looking at the ceiling. The illumination light from the ophthalmic surgical microscope shines downward toward the eyes. The objective lens of the microscope and the illumination light source form coaxial illumination. Although the light captured by the objective lens becomes oblique light after the optical path transformation for the surgeon to observe, the image seen by the surgeon is still a vertical perspective from top to bottom.

[0040] In this embodiment, the indicating end 12 is provided with a light portion that can be manipulated to emit light. The light portion can actively emit light or reflect corresponding light to form a light spot, thereby indicating the front end position of the indicating needle 05.

[0041] The bright part includes a reflector 11 disposed at the indicating end 12. The reflector 11 can reflect the microscope illumination light from top to bottom to the objective lens, so that the operator can use the bright reflective point to determine the position of the indicating end 12 without setting up an additional active light source. The reflector 11 is a mirror structure. Furthermore, the reflector 11 is in the form of a convex spherical surface (convex mirror). The advantage of the convex spherical surface is that even if the angle of the reflector 11 is not on the horizontal plane, when it is slightly tilted, the reflective point can still be seen. The reflector 11 is fixedly connected to the front end of the indicator needle 05. The reflector 11 can be facing away from the guide tube 02 to reflect light toward the outside of the eyeball.

[0042] In order to avoid insufficient reflected light intensity, an optical fiber 13 is inserted into the indicator pin 05. The front end of the optical fiber 13 is adjacent to the front end opening of the indicator pin 05. Furthermore, the front end of the optical fiber 13 can slightly protrude from the front end opening of the indicator pin 05 or be nearly flush. The optical fiber 13 forms a bright light point at the indicating end through active light emission, indicating the position of the indicating end. The reflector 11 and the optical fiber 13 can be used together or separately, and the present disclosure does not limit this.

[0043] The optical fiber 13 penetrates out at a position adjacent to the rear end of the indicating needle 05 and is connected to a light source. The light source is a pulsed light source, not necessarily a laser light source, and can also be a relatively strong light source. Specifically, the light source is a pulsed light generator (not shown) such as a pulsed laser generator. The front end of the optical fiber 13 (such as an optical fiber) is arranged adjacent to the reflector 11. The light of the optical fiber 13 shines out from the light-emitting end face of the indicating end 12 and can be directly observed by a microscope. The indicating needle 05 can be filled with a light-guiding resin inside to avoid breakage of the optical fiber 13 and protect the optical fiber 13.

[0044] The end face of the indicating end 12 is the light-emitting end face. When there is a reflector 11, the light emitted by the optical fiber 13 can also be reflected outward by the reflector 11. Combining with the microscope illumination light reflected by the reflector 11 itself, the light intensity of the indicating light spot is maximally enhanced, and a light spot for position indication can be provided relatively clearly, realizing the provision of the position of the indicating end 12. The positions of the indicating end 12 and the front end of the guiding tube 02 are relatively fixed.

[0045] In other embodiments, the optical fiber does not necessarily travel inside the indicating needle 05 and can also be attached to the surface of the indicating needle 05 to reduce the manufacturing difficulty.

[0046] In a feasible embodiment, the light-emitting part can also extend backward from the indicating end 12 to form a light-emitting strip of a certain length, so as to remind the position and bending condition of the entire indicating needle 05 when entering the eyeball through the light-emitting strip, avoiding undesired bending or undesired touch that may cause a change in the relative position between the indicating end 12 and the front end of the guiding tube 02, and avoiding incorrect positioning of the ciliary sulcus 15.

[0047] In this embodiment, the indicating needle 05 is made of an elastic metal material and can deform in the up and down direction under the action of an external force and return to its original shape after the external force action terminates ( Figure 2 as shown in the initial state). The indicating needle 05 is an integrally formed structure made of a shape memory alloy such as nickel-titanium alloy. More specifically, the indicating needle 05 is a hot-pressed integrally formed structure. The indicating needle 05 realizes expansion by means of the memory property of the nickel-titanium alloy.

[0048] In one embodiment, to reduce the wound size during penetration and minimize the surgical damage to the eyeball, the indicating needle 05 can be constrained by a constraining tube before penetrating the eyeball. After the constraining tube is removed, the indicating needle 05 returns to its initial state (expanded state). In the constrained state, the indicating needle 05 fits on the outer wall of the guiding tube 02.

[0049] In a feasible embodiment, the indicating needle 05 is made of a transparent material or a light-transmissive material. For example, the indicating needle 05 is made of transparent plastic material. The indicating needle 05 made of transparent plastic material not only has structural toughness and elasticity, but also is convenient to be connected to the guiding tube 02. At this time, the light-emitting part extends from the indicating end 12 to the rear end of the indicating needle 05, and the inside of the indicating needle 05 is a light-emitting cable. The difference between the light-emitting cable and the optical fiber is that it emits light as a whole. Furthermore, the entire indicating needle 05 can emit light, and the state of the entire indicating needle 05 during insertion and positioning can be clearly shown, providing a clearer and more intuitive display for the doctor's operation, providing accurate positioning for the doctor, and ensuring the smooth progress of the operation.

[0050] In this embodiment, the outer diameter of the indicating needle 05 is smaller than the outer diameter of the guiding tube 02. The outer diameter of the indicating needle 05 is between 0.05 mm and 2 mm. Further, the outer diameter of the indicating needle 05 is between 0.1 mm and 0.8 mm. The indicating needle 05 has a main body section 51 parallel to the guiding tube 02. The parallel interval between the main body section 51 and the guiding tube 02 is 1 - 5 mm. Further, the parallel interval between the main body section 51 and the guiding tube 02 is 1.52 - 4.83 mm. Further still, the parallel interval between the main body section 51 and the guiding tube 02 is 2.327 - 3.574 mm. The indicating end 12 is located at the front end of the main body section 51, and its orientation is parallel to the front end of the guiding tube 02. At this time, the orientation of the indicating end 12 is parallel to the guiding tube 02.

[0051] Of course, in other embodiments, the indicating end 12 can also be a structure that is bent upward and provided at the front end of the main body section 51.

[0052] In this embodiment, the indicating end 12 is provided at the front end of the main body section 51; the indicating end 12 does not extend beyond the front end of the guiding tube 02 forward. Along the length direction of the guiding tube 02, the indicating end 12 of the indicating needle 05 is within 5 mm from the front end of the guiding tube 02. Further, along the length direction of the guiding tube 02, the indicating end 12 of the indicating needle 05 is flush with the front end of the guiding tube 02 or the two are 1 - 3 mm apart.

[0053] A bent section for connecting the guiding tube 02 is also provided at the rear end of the main body section 51. The bent section gradually approaches the guiding tube 02 backward until it is connected to the guiding tube 02. To form a space for the iris to be caught between the indicating needle 05 and the guiding tube 02 and avoid interference with the inner circle of the iris at the rear end of the indicating needle 05, the connection position of the bent section and the guiding tube 02 is more than 3 mm from the front end of the guiding tube 02, and further still more than 5 mm. The indicating needle 05 is made of an elastic metal material and is configured to return to its initial shape after the external force is removed after deformation.

[0054] The rear end of the indicating needle 05 is directly connected (e.g., adhesively) to the outer wall of the guiding tube 02. The guiding tube 02 is fixedly connected with an operating part, and the operating part includes a handle part 04 (operating handle) and a connecting rod 03. During use, the plane where the guiding tube 02 and the connecting rod 03 are located is taken as the horizontal plane. Of course, it can also be inclined at a certain angle or even used in a vertical plane. The connecting rod 03 is obliquely connected to the guiding tube 02. The connecting rod 03 and the guiding tube 02 are connected at an obtuse angle or other angles such as perpendicular. One end of the connecting rod 03 away from the guiding tube 02 is further provided with a handle connection port 06. The handle part 04 is connected to the handle connection port 06.

[0055] In other embodiments, the rear end of the indicating needle 05 can also be fixedly connected to the operating part. Specifically, the rear end of the indicating needle 05 is fixedly connected to the connecting rod 03.

[0056] As Figure 3 shown, during the use process, the guiding tube 02 and the indicating needle 05 enter the anterior chamber through the right corneal incision. The position of the locator 01 is adjusted so that the indicating needle 05 continues to move forward along the anterior surface of the iris 14 and the guiding tube 02 continues to move forward along the posterior surface of the iris 14 until the reflector 11 at the front end of the indicating needle 05 approaches the peripheral part of the iris 14 and the cornea 18. At this time, the front end opening 08 of the guiding tube 02 is aligned with the ciliary sulcus 15 (the ciliary sulcus 15 is located between the iris 14 and the ciliary process 20). The puncture needle 16 is inserted into the guiding tube 02 through the rear end opening 09 and then punctures the ciliary sulcus 15 through the front end opening 08. The puncture needle 16 continues to advance through the sclera 19 to the outside of the eyeball, and the suture 17 is introduced. The locator 01 is withdrawn, the intraocular lens is implanted, and the haptics of the intraocular lens are ligated and fixed in the ciliary sulcus (not shown), and the operation is completed.

[0057] Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step can be divided into multiple separate elements, components, parts or steps. The disclosure of "a" or "an" used to describe an element, component, part or step does not mean to exclude other elements, components, parts or steps.

[0058] It should be understood that the above description is for illustrative purposes and not for limitation. By reading the above description, many embodiments and many applications other than the provided examples will be apparent to those skilled in the art. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents to which those claims are entitled. For the sake of completeness, all articles and references including the disclosures of patent applications and patents are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the foregoing claims is not intended to abandon such subject matter, nor should it be considered that the inventor has not considered such subject matter to be a part of the disclosed inventive subject matter.

Claims

1. An ciliary sulcus locator, wherein, include: A guide tube with a straight tube structure, the interior of which is used to insert a puncture needle; the guide tube has a front end as an insertion end and a rear end relative to the front end; the front end has a front opening for the puncture needle to pass out, and the rear end has a rear opening for the puncture needle to enter; the tube wall of the guide tube is also provided with a scale mark; An indicator needle connected to the guide tube and moving together with the guide tube; the indicator needle has an indicator end adjacent to the front end of the guide tube; the indicator end is provided with a light portion that can be manipulated to emit light; the indicator end of the indicator needle and the front end are spaced 1 to 5 mm apart; the indicator needle as a whole extends forward together with the guide tube, and the indicator end of the indicator needle and the front end of the guide tube are spaced apart to form a spacing opening for the iris to be inserted into the indicator needle and the guide tube.

2. The ciliary sulcus locator according to claim 1, wherein, The indicating end of the indicating needle is spaced 1.52 to 4.83 mm from the front end.

3. The ciliary sulcus locator according to claim 1, wherein, The indicating end of the indicating needle is spaced 2.327 to 3.574 mm from the front end.

4. The ciliary sulcus locator according to any one of claims 1-3, wherein, The bright part includes a reflector arranged at the indicating end and / or an optical fiber inserted into the indicating needle or attached to the outer surface of the indicating needle; the optical fiber is separated from the indicating needle and extends at a position adjacent to the rear end of the indicating needle to match the light source; the front end of the optical fiber is arranged adjacent to the reflector.

5. The ciliary sulcus locator according to claim 1, wherein, The indicator needle has a main body section parallel to the guide tube, and the indicating end is arranged at the front end of the main body section; the rear end of the main body section is also provided with a curved section connected to the guide tube; the connection position between the curved section and the guide tube is more than 5 mm away from the front end of the guide tube.

6. The ciliary sulcus locator according to claim 1, wherein The guide tube is fixedly connected with an operating part, and the rear end of the indicator needle is directly connected to the outer tube wall of the guide tube, or the rear end of the indicator needle is fixedly connected to the operating part.

7. The ciliary sulcus locator according to claim 1, wherein, The outer diameter of the indicator needle is smaller than the outer diameter of the guide tube, and the outer diameter of the indicator needle is between 0.05 mm and 2 mm.

8. The ciliary sulcus locator according to claim 7, wherein The outer diameter of the indicator needle is between 0.05 mm and 0.8 mm.

9. The ciliary sulcus locator according to claim 1, wherein, The indicator needle is made of elastic metal material and is configured to return to its original shape after the external force is removed after deformation.

10. The ciliary sulcus locator according to claim 1, wherein, The indicating end does not extend forward beyond the front end of the guide tube; along the length direction of the guide tube, the indicating end of the indicating needle is within 5 mm from the front end of the guide tube.

11. The ciliary sulcus locator according to claim 10, wherein, Along the length direction of the guide tube, the indicating end of the indicating needle is flush with the front end of the guide tube or the distance between the two is 1 to 3 mm.

12. The ciliary sulcus locator according to claim 4, wherein, The light source is a pulse light generator.

13. The ciliary sulcus locator according to claim 6, wherein, The operating part includes a handle and a connecting rod; the connecting rod is connected to the guide tube at an angle, and a handle connection port is provided at one end of the connecting rod away from the guide tube, and the handle is connected to the handle connection port.

14. The ciliary sulcus locator according to claim 5, wherein, The front end of the guide tube is attached with an arc-shaped support body, and the rear end opening of the guide tube is an oblique opening; the direction of the indicating end is parallel to the guide tube, or the indicating end is an upwardly curved structure arranged on the main body section.

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