Ophthalmic Devices

Abstract

To provide an ophthalmic device that facilitates intrascleral fixation of an intraocular lens in the eye. [Solution] According to one embodiment of the present invention, an ophthalmic device used in intrascleral fixation of an intraocular lens is linear and has a length, and is provided with a sliding member that can slide in the length direction at a portion spaced a predetermined distance from the end that is inserted into the eye, and an opening formed between the end and the sliding member, wherein the sliding member is formed so as to be slidable only in one direction in the length direction toward the end, and the size of the opening can be changed by sliding the sliding member toward the end.

Description

[Technical Field]

[0001] The present invention relates to an ophthalmic device, and more particularly to an ophthalmic device used for intrascleral fixation of an intraocular lens. [Background technology]

[0002] In conventional cataract surgery, an artificial intraocular lens is implanted into the eye in place of the extracted crystalline lens. In recent years, intrascleral fixation, in which the haptics of the intraocular lens are embedded in the sclera, which forms the outer wall of the eyeball, has become widespread as a method for fixing the intraocular lens in the eye. In intrascleral fixation, the haptics of the intraocular lens inserted in the eye must be pulled out of the eye and fixed, and an instrument for this purpose has also been disclosed (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6502431 Summary of the Invention [Problem to be solved by the invention]

[0004] An intraocular lens implanted in the eye may fall into the eyeball for some reason. In this case, the fallen intraocular lens is removed from the eyeball and a new intraocular lens is inserted, but this places a strain on the eyeball, so a method for reusing the original intraocular lens is desired. However, the instrument described in Patent Document 1 does not allow for intrascleral fixation surgery using an intraocular lens. Furthermore, there is also the issue that intrascleral fixation surgery itself is highly difficult.

[0005] The present disclosure provides an ophthalmic device that facilitates intrascleral fixation of an intraocular lens by reusing an intraocular lens that has fallen into the eyeball. [Means for solving the problem]

[0006] According to one embodiment of the present disclosure, an ophthalmic device used for intrascleral fixation of an intraocular lens is linear and has a length, and is provided with a sliding member that is slidable in the length direction at a portion spaced a predetermined distance from an end that is inserted into the eye, and an opening formed between the end and the sliding member, wherein the sliding member is formed so as to be slidable only in one direction in the length direction toward the end, and the size of the opening can be changed by sliding the sliding member toward the end.

[0007] In an ophthalmic device according to one embodiment of the present disclosure, the opening may be inserted into the eye to receive a support portion of an intraocular lens, and the sliding member may be slid toward the end within the eye to clamp the support portion of the intraocular lens within the opening.

[0008] In an ophthalmic device according to an embodiment of the present disclosure, a protrusion may be provided on the portion of the opening that clamps the support portion of the intraocular lens.

[0009] In an ophthalmic device according to an embodiment of the present disclosure, an opening may be provided by folding back a resin thread and passing both ends through a sliding member.

[0010] In an ophthalmic device according to an embodiment of the present disclosure, an opening may be provided by a notch along the length of the tip of the resin strip.

[0011] An ophthalmic device according to one embodiment of the present disclosure may be configured such that the sliding portion can slide in only one direction toward the end by means of sawtooth provided along the length from the end where the opening is located and claws provided on the sliding member. [Effects of the Invention]

[0012] According to the present disclosure, it is possible to provide an ophthalmic device that facilitates intrascleral fixation of an intraocular lens by reusing an intraocular lens that has fallen into the eyeball. [Brief explanation of the drawings]

[0013] [Figure 1]FIG. 1(a) is a schematic diagram of an intraocular lens, and (b) is a schematic cross-sectional view of an eye into which the intraocular lens has been implanted. [Figure 2] FIG. 2 is a schematic diagram of an ophthalmic device according to one embodiment of the present disclosure. [Figure 3] 3(a) to 3(e) are schematic diagrams showing how an ophthalmic device according to an embodiment of the present disclosure is used. [Figure 4] FIG. 4 is a schematic diagram of an ophthalmic device according to one embodiment of the present disclosure. [Figure 5] 5(a) to 5(e) are schematic diagrams showing how an ophthalmic device according to an embodiment of the present disclosure is used. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the invention according to the present disclosure (also referred to as the present invention) will be described using the drawings. Note that the drawings are merely examples, and the present invention is not limited to those shown in the drawings. For example, the proportions of each part of the illustrated ophthalmic device, its size relative to the eye, and its proportion relative to instruments, intraocular lenses, etc. are not limited to those shown in the drawings. Also, please note that the figures are not drawn to actual proportions for ease of understanding.

[0015] FIG. 1(a) is a schematic diagram of an example of an intraocular lens. The intraocular lens 1 has an optical portion 2 and haptics 3. While various types of intraocular lenses 1 exist, the present disclosure can be applied to any type of intraocular lens 1. FIG. 1(b) is a schematic cross-sectional view of an eye with an intraocular lens inserted (implanted) in the eye. The example in FIG. 1(b) shows an example in which the intraocular lens 1 is inserted into the eye by intrascleral fixation. When the human gaze direction is assumed to be forward, the optical portion 2 of the intraocular lens 1 is positioned behind the iris 102. In the case of intrascleral fixation, the haptics 3 of the intraocular lens are fixed to the sclera 101 of the eye. While FIG. 1(b) shows a case in which the crystalline lens has been completely removed, other methods for inserting the intraocular lens 1 include removing the cloudy crystalline lens caused by a cataract, inserting the intraocular lens into the lens capsule, and then fixing the lens, or sewing the intraocular lens 1 to the sclera 101 with thread.

[0016] The intraocular lens 1 inserted into the eye by these methods may shift for some reason and fall into the eye. According to one embodiment of the present disclosure, an ophthalmic device is provided that utilizes the fallen intraocular lens and is particularly suitable for fixation by intrascleral fixation surgery.

[0017] First Embodiment FIG. 2 is a schematic diagram of an ophthalmic device according to an embodiment of the present disclosure. The ophthalmic device 10 may be used for intrascleral fixation of an intraocular lens 1. As shown in the figure, the ophthalmic device 10 may be linear and have a length direction. The ophthalmic device 10 may be formed from a sliding member 13 and a thread 14. In this case, the ophthalmic device 10 (the sliding member 13 and the thread 14) may be made of resin, such as acrylic, silicone, nylon, or the like. The sliding member 13 and the thread 14 may be made of the same material or different materials. Because the ophthalmic device 10 remains in the eye together with the intraocular lens 1, the ophthalmic device 10 may be made of the same material as the intraocular lens 1, such as PVDF (Polyvinylidene Fluoride). The material of the ophthalmic device 10 is not limited to these.

[0018] Although details will be described later, the overall thickness of the ophthalmic device 10 may be within the range of, for example, 0.4 to 0.7 mm, which allows it to pass through a puncture hole made by a 23 to 27 gauge needle.

[0019] The ophthalmic device 10 may have an end 11 that is inserted into the eye, a sliding member (slider) 13 that is slidable in the longitudinal direction at a portion spaced a predetermined distance from the end 11, and an opening 12 formed between the end 11 and the sliding member 13. The predetermined distance between the end 11 and the sliding member 13 may be the distance at which the sliding member 13 is located inside the eye when the ophthalmic device 10 is inserted into the eye from the end 11, and may be, for example, about 0.3 to 1.0 mm.

[0020] In the case of the ophthalmic device 10 of FIG. 2 , the opening 12 is formed by folding back a resin thread 14 and passing the folded end through the sliding member 13. The manufacturing method of the ophthalmic device 10 is not limited to the above. For example, the opening 12 may be formed by folding back a resin thread 14 and passing both ends of the thread 14 through the sliding member 13. Here, the sliding member 13 is formed to be slidable only in one direction along the length of the ophthalmic device 10, toward the end 11. For example, the sliding member 13 may have claws and the thread 14 may have sawtooth teeth that interlock with each other to restrict the sliding direction. Alternatively, the thread 14 or the sliding member 13 may be processed to increase friction between the thread 14 and the sliding member 13. Although the term "thread" is used, the member 14 may be any flexible, elongated member made of resin, and may be called a tube, pipe, rod, ribbon, strip, or the like.

[0021] The size of the opening 12 can be changed by sliding the sliding member 13 toward the end 11. As will be described in detail later, the support part 3 of the intraocular lens 1 is inserted into the opening 12. In this state, the sliding member 13 is slid toward the end 11 to reduce the opening of the opening 12, and the ophthalmic device 10 is configured to clamp the support part 3. Note that, as shown in FIG. 2 , the opening 12 may be provided with jagged edges or protrusions such as sawtooth on the side that clamps the support part 3 in order to improve the retention of the support part 3.

[0022] Next, referring to FIG. 3, a procedure for fixing an intraocular lens 1 that has fallen into the eye to the sclera 101 using an ophthalmic device 10 will be described. First, as shown in FIG. 3(a), a needle 6 is punctured into the sclera 101. The puncture position of the needle 6 may be approximately 2.0 to 2.5 mm from the cornea. Next, as shown in FIG. 3(b), the ophthalmic device 10 is inserted into the eye through the puncture hole 7 made by the needle 6. Note that the cornea is not shown in FIG. 3(b) and subsequent figures, and a perspective view of the inside of the eye is shown. Next, as shown in FIG. 3(c), the surgeon inserts the support portion 3 of the intraocular lens 1 inside the eye into the opening 12. Note that an instrument operated by the surgeon may be inserted through a separate puncture hole. From this state, as shown in FIG. 3(d), the surgeon slides the sliding member 13 toward the end 11 using the instrument 8, closing the opening 12 and causing the support portion 3 of the intraocular lens 1 to be clamped by the ophthalmic device 10. Thereafter, the other support part 3 of the intraocular lens 1 is similarly clamped by the ophthalmic device 10 inserted from the opposite side in the procedure shown in FIGS. 3(a) to 3(d). Then, the positions of both ophthalmic devices 10 (i.e., the positions of the intraocular lenses 1) may be adjusted inside the eye. After the positioning is complete, the thread 14 remaining on the outside of the sclera 101 may be ligated as shown in FIG. 3(e), and then cut and buried in the sclera 101. Note that the method for processing the thread 14 is not limited to this, as long as it is possible to fix the ophthalmic device 10.

[0023] Thus, according to the ophthalmic device according to an embodiment of the present disclosure, the intraocular lens can be held by inserting the support part of the intraocular lens into the opening, reducing the size of the opening, and clamping the intraocular lens in place, thereby facilitating intrascleral fixation of the intraocular lens inside the eye.

[0024] Second Embodiment FIG. 4 is a schematic diagram of an ophthalmic device according to another embodiment of the present disclosure. As shown in the figure, the ophthalmic device 20 may be linear and have a length direction, similar to the ophthalmic device 10. The ophthalmic device 20 may be formed from a sliding member 23 and a strip 24. In the second embodiment, the ophthalmic device 20 (the sliding member 23 and the strip 24) may also be made of resin, such as acrylic, silicone, or nylon. The sliding member 23 and the strip 24 may be made of the same material or different materials. Since the ophthalmic device 20 is placed inside the eye together with the intraocular lens 1, the ophthalmic device 20 may be made of the same material as the intraocular lens 1, such as PVDF (Polyvinylidene Fluoride). The material of the ophthalmic device 20 is not limited to these.

[0025] Similarly to the ophthalmic device 10, the ophthalmic device 20 may have a thickness that allows it to pass through a puncture hole made by a 23-27 gauge needle, for example, within a range of 0.4-0.7 mm.

[0026] The ophthalmic device 20 may have an end 21 that is inserted into the eye, a sliding member 23 that is slidable in the length direction at a portion spaced a predetermined distance from the end 21, and an opening 22 formed between the end 21 and the sliding member 23. The predetermined distance between the end 21 and the sliding member 23 may be the same as the predetermined distance between the end 11 and the sliding member 13 in the first embodiment.

[0027] In the case of the ophthalmic device 20 of FIG. 4 , an opening 22 is formed at the tip of a resin strip 24 by a notch along the length. That is, the notch functions as the opening 22 when opened by the surgeon during surgery. The ophthalmic device 20 may be manufactured by passing the notched tip through a sliding member 23. Note that the manufacturing method of the ophthalmic device 20 is not limited to the above. Here, the sliding member 23 is formed to be slidable in only one direction along the length of the ophthalmic device 10, toward the end 21. This may also be configured similarly to the sliding member 13 and thread 14 of the ophthalmic device 10, for example. Note that although the term "strip" is used, the member 24 may be any flexible, elongated member having a certain width, and may be called a belt, strap, ribbon, tape, band, or the like.

[0028] The size of the opening 22 can be changed by sliding the sliding member 23 toward the end 21. As will be described in detail later, in the ophthalmic device 20, as in the ophthalmic device 10, the support part 3 of the intraocular lens 1 is inserted into the opening 22. In this state, the sliding member 23 is slid toward the end 21 to reduce the opening of the opening 22, and the ophthalmic device 20 is configured to clamp the support part 3.

[0029] Next, the procedure for intrascleral fixation using the ophthalmic device 20 will be described using FIG. 5. First, as shown in FIG. 5(a), a needle 6 is punctured into the sclera 101. This may be similar to the procedure described for the ophthalmic device 10 using FIG. 4(a), and therefore will not be described further. Next, as shown in FIG. 5(b), the ophthalmic device 20 is inserted into the eye through a puncture hole 7 made by the needle 6. Note that the cornea is not shown in FIG. 5(b) and subsequent figures, and a perspective view of the inside of the eye is shown. Next, as shown in FIG. 5(c), the opening 22 of the ophthalmic device 20 inside the eye is opened by the surgeon using an instrument 8. Note that the instrument 8 operated by the surgeon may be inserted through a separate puncture hole. Here, in the example of FIG. 5(c), the shape of the opening 22 is shown as a diamond, but the shape of the opening 22 is not limited to this and may be elliptical.

[0030] Next, as shown in FIG. 3(d), the surgeon inserts the haptic 3 of the intraocular lens 1 in the eye into the opening 22. From this state, as shown in FIG. 3(e), the surgeon slides the sliding member 23 toward the end 21, gradually closing the opening 22 and causing the haptic 3 of the intraocular lens 1 to be clamped by the ophthalmic device 20. Thereafter, the other haptic 3 of the intraocular lens 1 is similarly clamped by the ophthalmic device 20 inserted from the opposite side, in the same manner as shown in FIGS. 5(a) to 5(d). Then, the positions of both ophthalmic devices 10 (i.e., the positions of the intraocular lenses 1) may be adjusted within the eye. After the positioning is complete, the strip 24 remaining on the outside of the sclera 101 may be cut, and the end may be processed with heat to embed the strip 24 in the sclera 101. Note that the method for processing the strip 24 is not limited to this, as long as it is possible to fix the ophthalmic device 20.

[0031] In this way, the ophthalmic device according to another embodiment of the present disclosure also makes it possible to hold an intraocular lens by inserting the support of the intraocular lens into the opening, reducing the size of the opening, and clamping the intraocular lens, thereby facilitating intrascleral fixation of the intraocular lens inside the eye.

[0032] Although the present invention has been described based on the drawings and examples, it should be noted that various modifications and alterations can be easily made by those skilled in the art based on the present disclosure, and therefore, it should be noted that these modifications and alterations are included within the scope of the present invention.

[0033] For example, although the above description has been given of intrascleral fixation of an intraocular lens that has fallen into the eye, the ophthalmic device according to the present disclosure may also be applied to cases where a new intraocular lens is inserted and attached from outside the eye. [Explanation of symbols]

[0034] 1. Intraocular lenses 2 Optical Department 3 Support (Haptics) 6 needles 7 Puncture hole 8. Equipment 10 Ophthalmic Devices 11 End 12 Opening 13 Sliding member 14 Resin thread 20 Ophthalmic Devices 21 End 22 Opening 23 Sliding member 24 Resin strip

Claims

1. An ophthalmic device used for intrascleral fixation of an intraocular lens, comprising: The ophthalmic device comprises: It is linear and has a length direction, a sliding member that is slidable in the length direction at a portion spaced a predetermined distance from the end that is punctured into the eye; an opening formed between the end and the sliding member; Equipped with The sliding member is formed to be slidable only in one direction in the length direction toward the end portion, The size of the opening is variable as the sliding member slides toward the end. Ophthalmic devices.

2. The distance between the end and the sliding member is 0.3 to 1.0 mm. The ophthalmic device of claim 1 .

3. The ophthalmic device is made of resin. The ophthalmic device of claim 1 .

4. the sliding member is formed to be slidable in only one direction toward the end by sawtooth provided along the length direction from the end where the opening is located and a claw provided on the sliding member; The ophthalmic device of claim 1 .

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