Eyelid retractor

Abstract

The present invention relates to medical devices, and specifically discloses an eyelid retractor, characterized in that it includes a positioning scale group and an eyelid retractor skeleton structure, the eyelid retractor skeleton structure includes a first retractor support arm (111) and a second retractor support arm (112), the two are connected in a "V" shape, an eyelid retracting structure is provided at one end of each retractor support arm located at the "V"-shaped opening, a positioning scale group is provided at the eyelid retracting structure, each positioning scale in the positioning scale group is connected to the eyelid retracting structure through its corresponding scale support arm, and an opening and closing degree adjustment structure (3) is provided between the two retractor support arms. The present invention integrates tools for retracting the eyelid and for locating the ocular surface structure into one device, which can make the operation process of retracting the eyelid and locating the ocular surface structure more convenient, improve the positioning accuracy, and effectively ensure the identity of the experimental or treatment model.

Description

Technical Field

[0001] The present invention relates to medical equipment, in particular to an eyelid retractor. Background Art

[0002] When performing ophthalmic surgery or operating on animal models of eye diseases, the eyelids need to be pried open to increase the surgical field of view for easier operation.

[0003] In some cases, it is also necessary to locate a certain part of the ocular surface, such as the preparation of animal models of eye diseases, injection of drugs into the vitreous cavity of humans or animals, etc., all of which require precise positioning of a specific part of the ocular surface. Only by unifying the operation site can the identity of the experimental or treatment model be guaranteed, and the accuracy and credibility of the research results be ensured.

[0004] However, in the prior art, the eyelid retraction device and the ocular surface measurement device are separate, which means that two devices need to be used in the process of retracting the eyelids and positioning the ocular surface. On the one hand, the operation process is complicated and only one direction can be measured at a time. Different directions require multiple measurements, which is time-consuming and labor-intensive. On the other hand, the positioning error is large, making it difficult to achieve uniformity in the operation site and ensure the uniformity of the experiment.

[0005] In view of this, it is necessary to design an eyelid retractor. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an eyelid retractor, which combines an eyelid retracting device and an ocular surface measurement and positioning device into one, and has the functions of both retracting the eyelid and positioning the corneal limbus, making the operation process of retracting the eyelid and positioning the ocular surface position more convenient, thereby ensuring the accuracy when performing operations such as circumferential corneal limbus sutures and intravitreal drug injections, and making the operation site unified when performing operations such as making a batch of animal models of eye diseases, so as to ensure the uniformity of the experiment.

[0007] In order to solve the above technical problems, the present invention provides an eyelid spreader, which includes a positioning scale group and an eyelid spreader skeleton structure. The eyelid spreader skeleton structure includes a first spreader support arm and a second spreader support arm, the first spreader support arm and the second spreader support arm are cross-connected in a "V" shape; an adjustment structure suitable for adjusting the opening width of the eyelid spreader is provided between the first spreader support arm and the second spreader support arm; the first spreader support arm is provided with or integrally formed with a first eyelid spreader structure at one end of the "V"-shaped opening; the second spreader support arm is provided with or integrally formed with a second eyelid spreader structure at one end of the "V"-shaped opening. The positioning ruler group includes a first positioning ruler, a second positioning ruler, a third positioning ruler and a fourth positioning ruler, wherein the first positioning ruler is arranged along the Y direction and is connected to the first eyelid opening structure by a first positioning ruler support arm arranged along the X direction; the second positioning ruler is arranged along the Y direction and is connected to the second eyelid opening structure by a second positioning ruler support arm arranged along the X direction; the third positioning ruler is arranged along the X direction and is connected to one end of the first positioning ruler support arm by the third positioning ruler support arm arranged along the Y direction; the fourth positioning ruler is arranged along the Z direction and is arranged on one end of the third positioning ruler away from the third positioning ruler support arm.

[0008] Furthermore, the first eyelid stretching structure and the second eyelid stretching structure are both "U"-shaped arc structures, and the opening ends of the "U"-shaped arc structures of the two are arranged relatively to each other; the first positioning scale support arm is fixed to or integrally formed at the opening end of the "U"-shaped arc structure of the first eyelid stretching structure, and the second positioning scale support arm is fixed to or integrally formed at the opening end of the "U"-shaped arc structure of the second eyelid stretching structure.

[0009] Furthermore, a first slot arranged along the Y direction is provided in the middle area of ​​the first positioning scale support arm, and a first adjustment knob is also provided in the middle area of ​​the first positioning scale support arm; a second slot arranged along the Y direction is provided in the middle area of ​​the second positioning scale support arm, and a second adjustment knob is also provided in the middle area of ​​the second positioning scale support arm.

[0010] Further, the first slot is suitable for placing the first positioning scale, one end of the first positioning scale is placed in the first slot, and can move along the Y direction in the first slot, and the relative position is fixed by the first adjusting knob; the second slot is suitable for placing the second positioning scale, one end of the second positioning scale is placed in the second slot, and can move along the Y direction in the second slot, and the relative position is fixed by the second adjusting knob.

[0011] Furthermore, a first limbal positioning arc is provided or formed integrally with one end of the first positioning scale away from the first slot; a second limbal positioning arc is provided or formed integrally with one end of the second positioning scale away from the second slot.

[0012] Furthermore, a third slot is provided at one end of the third positioning scale support arm, a through hole is provided at the other end of the third positioning scale support arm, and the third positioning scale support arm is connected to one end of the first positioning scale support arm by cooperating with the third adjustment knob through the through hole.

[0013] Further, the third slot is suitable for placing the third positioning scale, one end of the third positioning scale is placed in the third slot and can move along the X direction in the third slot, and the end of the third positioning scale away from the third positioning scale support arm is provided with or integrally formed with a third corneal limbus positioning arc, and the fourth positioning scale is fixed to the end of the third positioning scale away from the third positioning scale support arm by a rotating structure, and the axis direction of the rotating structure is set along the Y direction.

[0014] Furthermore, the first positioning scale is provided with a first positioning scale scale, the second positioning scale is provided with a second positioning scale scale, the third positioning scale is provided with a third positioning scale scale, and the fourth positioning scale is provided with a fourth positioning scale scale, and the measurement accuracy of the first positioning scale scale, the second positioning scale scale, the third positioning scale scale and the fourth positioning scale scale are consistent.

[0015] Furthermore, the adjustment structure includes an adjustment rod and a fourth adjustment knob, the fourth adjustment knob is arranged at or integrally formed in the middle area of ​​the adjustment rod, the adjustment rod is a screw rod, and the thread rotation directions on the adjustment rod on both sides of the fourth adjustment knob are designed in opposite directions.

[0016] Furthermore, a first internal threaded hole arranged along the Y direction is provided in the middle area of ​​the first spreader support arm; a second internal threaded hole arranged along the Y direction is provided in the middle area of ​​the second spreader support arm, and the threads of the first internal threaded hole and the threads of the second internal threaded hole match the threads on the corresponding adjustment rods.

[0017] Through the above technical scheme, since the eyelid retractor provided by the present invention includes a positioning scale group and an eyelid retractor skeleton structure, it can have the functions of both opening the eyelid and positioning the corneal limbus, making the operation process of opening the eyelid and positioning the ocular surface position more convenient, thereby ensuring the accuracy when performing operations such as circumferential corneal limbus sutures and intravitreal drug injections, and making the operation site unified when performing operations such as making a batch of animal models of eye diseases, so as to ensure the uniformity of the experiment.

[0018] Other advantages of the present invention and the technical effects of the preferred embodiments will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the eyelid retractor of the present invention;

[0020] Figure 2 is a partial schematic diagram of an embodiment of the eyelid retractor of the present invention;

[0021] Figure 3 is a schematic diagram of a third positioning scale and a fourth positioning scale in one embodiment of the eyelid retractor of the present invention;

[0022] Figure 4 is a schematic diagram of a first positioning scale and a first positioning scale support arm in one embodiment of an eyelid retractor of the present invention;

[0023] Figure 5 is a schematic diagram of a second positioning scale and a second positioning scale support arm in one embodiment of the eyelid retractor of the present invention;

[0024] Figure 6 Schematic diagram of the working principle of the first adjustment knob in one embodiment of the eyelid retractor of the present invention;

[0025] Figure 7 Schematic diagram of the working principle of the second adjustment knob in one embodiment of the eyelid retractor of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the third positioning scale support arm in one embodiment of the eyelid retractor of the present invention;

[0027] Fig. 9 It is a structural schematic diagram of the adjustment structure in one embodiment of the eyelid retractor of the present invention.

[0028] Description of Reference Numerals

[0029] 111-first spreader support arm 1111-first internal threaded hole

[0030] 112- second opener support arm 1121- second internal threaded hole

[0031] 121- first eyelid opening structure 122- second eyelid opening structure

[0032] 21-first positioning scale 211-first positioning scale scale

[0033] 22-second positioning scale 221-second positioning scale scale

[0034] 23-third positioning scale 231-third positioning scale scale

[0035] 232-Rotation structure 24-Fourth positioning scale

[0036] 241-Fourth positioning scale scale 3-Adjustment structure

[0037] 31-Adjustment rod 32-Fourth adjustment knob

[0038] 41-first limbal positioning arc 42-second limbal positioning arc

[0039] 43-third corneal limbus positioning arc 51-first positioning scale support arm

[0040] 511-first slot 52-second positioning scale support arm

[0041] 521- second slot 53- third positioning scale support arm

[0042] 531- third slot 532- through hole

[0043] 61-first adjustment knob 62-second adjustment knob

[0044] 63-Third adjustment knob DETAILED DESCRIPTION

[0045] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0046] First of all, it should be noted that the following X-direction, Y-direction and Z-direction are three directions perpendicular to each other in three-dimensional space. They are only for the convenience of describing the setting direction of each component and the relative position between each component, and are not used as a specific structural limitation. For the convenience of description, taking the right eye as an example below, the 0 o'clock position is defined as the upper eyelid side, the 3 o'clock position is defined as the nose side, the 6 o'clock position is defined as the lower eyelid side, and the 9 o'clock position is defined as the temporal side (temple side).

[0047] like Figure 1As shown, an eyelid retractor of the present invention comprises a positioning scale set and an eyelid retractor skeleton structure. The eyelid retractor skeleton structure is a first retractor support arm 111 and a second retractor support arm 112 which are cross-welded in a "V" shape, and an adjustment structure 3 suitable for adjusting the opening width of the eyelid retractor is arranged between the two; a first eyelid retractor support arm 111 is integrally formed with one end located at the "V"-shaped opening of the first retractor support arm 111; and a second eyelid retractor support arm 112 is integrally formed with one end located at the "V"-shaped opening of the second retractor support arm 112. The positioning scale group includes a first positioning scale 21, a second positioning scale 22, a third positioning scale 23 and a fourth positioning scale 24, wherein the first positioning scale 21 is arranged along the Y direction and is connected to the first eyelid opening structure 121 by a first positioning scale support arm 51 arranged along the X direction; the second positioning scale 22 is arranged along the Y direction and is connected to the second eyelid opening structure 122 by a second positioning scale support arm 52 arranged along the X direction; the third positioning scale 23 is arranged along the X direction and is connected to one end of the first positioning scale support arm 51 by a third positioning scale support arm 53 arranged along the Y direction; the fourth positioning scale 24 is arranged along the Z direction and is arranged on one end of the third positioning scale 23 away from the third positioning scale support arm 53.

[0048] The present invention discloses an eyelid retractor, wherein the retractor width is adjusted by adjusting the adjustment structure 3, so that the eyelid retractor is placed in the eye and the eyelid is retracted, so that the operator can see the position of the corneal margin clearly, and sufficient operating space is provided for the operator, and the eyelid retractor structure is integrally formed on the retractor support arm. Compared with the welding method, the integral forming method makes the overall strength of the eyelid retractor skeleton structure higher, and the eyelid retractor skeleton structure will not be broken. The first positioning scale 21, the second positioning scale 22 and the third positioning scale 23 can realize the positioning of the corneal margin, so that the operator can use the corneal margin as a reference line. When performing a suturing operation, the distances of the 0 o'clock, 3 o'clock, 6 o'clock and 9 o'clock positions of the elliptical cornea are positioned by the first positioning scale 21, the second positioning scale 22 and the third positioning scale 23, so as to achieve the purpose of precise operation; and the fourth positioning scale 24 can help the operator to accurately grasp the needle insertion depth during the injection operation; and the positioning scale group is also convenient for selecting different distances for positioning according to the size differences of different individual eyeballs. This eyelid retractor not only simplifies the corneal limbus positioning operation, but also improves the accuracy of both suturing and injection operations, ensuring the same standard operation requirements for drug treatment effects and scientific research operations.

[0049] Preferably, as another specific embodiment of an eyelid stretcher of the present invention, the first stretcher support arm 111 and the second stretcher support arm 112 are integrally formed and in a "V" shape. Compared with the welding forming method, the integrally formed design can make the fatigue strength of the closed end of the "V" shape higher, and can adjust the opening width of the eyelid stretcher more times, thereby extending the service life of the eyelid stretcher.

[0050] Specifically, as a preferred embodiment, Figure 1 As shown, the first eyelid propping structure 121 and the second eyelid propping structure 122 are both "U"-shaped arc structures, and the opening ends of the "U"-shaped arc structures of the two are arranged oppositely; the first positioning scale support arm 51 is fixed at the opening end of the "U"-shaped arc structure of the first eyelid propping structure 121, and the second positioning scale support arm 52 is fixed at the opening end of the "U"-shaped arc structure of the second eyelid propping structure 122. The specific fixing method can be welding or integral molding; the eyelid propping structure is designed as a "U"-shaped arc structure, which can reduce the pressure on the eyelids and effectively reduce the pain of patients or experimental animals.

[0051] Specifically, as a preferred embodiment, Figure 6 As shown, the middle area of ​​the first positioning scale support arm 51 is provided with a first slot 511 arranged along the Y direction, and the middle area of ​​the first positioning scale support arm 51 is also provided with a first adjustment knob 61; Figure 7 As shown, a second slot 521 arranged along the Y direction is provided in the middle area of ​​the second positioning scale support arm 52, and a second adjusting knob 62 is also provided in the middle area of ​​the second positioning scale support arm 52.

[0052] Specifically, as a preferred embodiment, Figure 1 As shown, the first slot 511 is suitable for placing the first positioning scale 21, one end of the first positioning scale 21 is placed in the first slot 511, and can move along the Y direction in the first slot 511, and the relative position is fixed by the first adjusting knob 61; the second slot 521 is suitable for placing the second positioning scale 22, one end of the second positioning scale 22 is placed in the second slot 521, and can move along the Y direction in the second slot 521, and the relative position is fixed by the second adjusting knob 62.

[0053] During actual operation, the first adjusting knob 61 is loosened to allow the first positioning scale 21 to move along the Y direction in the first slot 511. When the first positioning scale 21 is moved to the desired position, the first adjusting knob 61 is tightened to press downward, and the first positioning scale 21 and the inner wall of the first slot 511 are tightly pressed together, so as to increase the maximum static friction force and fix the relative position of the first positioning scale 21; the second adjusting knob 62 is loosened to allow the second positioning scale 22 to move along the Y direction in the second slot 521. When the second positioning scale 22 is moved to the desired position, the second adjusting knob 62 is tightened to press downward, and the second positioning scale 22 and the inner wall of the second slot 521 are tightly pressed together, so as to increase the maximum static friction force and fix the relative position of the second positioning scale 22.

[0054] Specifically, as a preferred embodiment, Figure 1 As shown, the first limbal positioning arc 41 is formed integrally at one end of the first positioning scale 21 away from the first slot 511; the second limbal positioning arc 42 is formed integrally at one end of the second positioning scale 22 away from the second slot 521. The first limbal positioning arc 41 and the second limbal positioning arc 42 are used to fit the limbus, and their arc-shaped design can fit well with the elliptical limbus, and can assist the operator in fixing the amniotic membrane and reduce the difficulty of the operation when performing operations such as amniotic membrane transplantation.

[0055] Specifically, as a preferred embodiment, Figure 3 and Figure 8 As shown, one end of the third positioning scale support arm 53 is provided with a third slot 531, and the other end of the third positioning scale support arm 53 is provided with a through hole 532. The third positioning scale support arm 53 is connected to one end of the first positioning scale support arm 51 close to the closed end of the "V"-shaped eyelid retractor skeleton structure by cooperating with the through hole 532 and the third adjusting knob 63. The third positioning scale support arm 53 is rotated with the X direction as the rotation axis by cooperating with the through hole 532 and the third adjusting knob 63, and the relative position of the third positioning scale support arm 53 is fixed.

[0056] Specifically, as a preferred embodiment, Figure 3As shown, the third slot 531 is suitable for placing the third positioning scale 23, one end of the third positioning scale 23 is placed in the third slot 531, and can move along the X direction in the third slot 531, and a third corneal limbus positioning arc 43 is integrally formed on one end of the third positioning scale 23 away from the third positioning scale support arm 53, and the fourth positioning scale 24 is fixed to one end of the third positioning scale 23 away from the third positioning scale support arm 53 by a rotating structure 232, and the rotation axis direction of the rotating structure 232 is set along the Y direction. The arc-shaped design of the third corneal limbus positioning arc 43 can fit well with the approximately elliptical corneal limbus, and can assist the operator in fixing the amniotic membrane and reduce the difficulty of operation when performing operations such as amniotic membrane transplantation; the design of the rotating structure 232 allows the fourth positioning scale 24 to be tilted toward the third positioning scale 23 and folded together with the third positioning scale 23 when the fourth positioning scale 24 is not needed, which can provide the operator with a larger operating space and facilitate the storage of the eyelid retractor after use.

[0057] According to the above technical solution, in actual operation, the specific adjustment process of the third positioning scale support arm 53 is: loosen the third adjustment knob 63, rotate the third positioning scale support arm 53, so that the third corneal limbus positioning arc 43 can fit with the corneal limbus, and when the third corneal limbus positioning arc 43 fits with the corneal limbus, tighten the third adjustment knob 63, so that the through hole 532 of the third positioning scale support arm 53 can be tightly pressed together with the first positioning scale support arm 51, and the position of the third positioning scale support arm 53 is fixed by increasing the maximum static friction force; the cornea of ​​the eyeball is a circular or elliptical shape, and the eyeball is three-dimensional, and the cornea is an irregular spherical surface in it, with a convex center and a gradually decreasing edge height, and the design that the third positioning scale support arm 53 can rotate can make the third corneal limbus positioning arc 43 fit well with the corneal limbus.

[0058] Specifically, as a preferred embodiment, Figure 3 , Figure 4 and Figure 5As shown, the first positioning scale 21 is provided with a first positioning scale scale 211, the second positioning scale 22 is provided with a second positioning scale scale 221, the third positioning scale 23 is provided with a third positioning scale scale 231, and the fourth positioning scale 24 is provided with a fourth positioning scale scale 241. More preferably, the measurement accuracy of the first positioning scale scale 211, the second positioning scale scale 221, the third positioning scale scale 231 and the fourth positioning scale scale 241 are consistent, for example, they are all accurate to 0.5 mm. More specifically, the zero scale of the first positioning scale scale 211 is set at the connection between the first corneal limbus positioning arc 41 and the first positioning scale 21, the zero scale of the second positioning scale scale 221 is set at the connection between the second corneal limbus positioning arc 42 and the second positioning scale 22, and the zero scales of the third positioning scale scale 231 and the fourth positioning scale scale 241 are set at the location of the rotating structure 232.

[0059] Specifically, as a preferred embodiment, Fig. 9 As shown, the adjustment structure 3 includes an adjustment rod 31 and a fourth adjustment knob 32, wherein the fourth adjustment knob 32 is integrally formed in the middle area of ​​the adjustment rod 31, the adjustment rod 31 is a screw, and the screw threads on the adjustment rod 31 located on both sides of the fourth adjustment knob 32 are designed in reverse direction. The reverse screw thread design enables the first spreader support arm 111 and the second spreader support arm 112 to move toward the fourth adjustment knob 32 at the same time, or to move away from the fourth adjustment knob 32 at the same time, that is, to achieve the tightening and stretching of the eyelid spreader.

[0060] As a more preferred embodiment, Fig. 9 As shown, a first internal threaded hole 1111 is provided in the middle area of ​​the first spreader support arm 111 along the Y direction; a second internal threaded hole 1121 is provided in the middle area of ​​the second spreader support arm 112 along the Y direction, and the threads of the first internal threaded hole 1111 and the second internal threaded hole 1121 match the threads on the corresponding adjustment rods 31.

[0061] According to the preferred solution of the above-mentioned regulating structure, in the specific implementation, as Fig. 9 As shown, the thread of the portion of the adjusting rod 31 that cooperates with the first spreader support arm 111 can be set as a right-hand thread, and the internal thread of the first internal thread hole 1111 is also a right-hand thread; the thread of the portion of the adjusting rod 31 that cooperates with the second spreader support arm 112 is set as a left-hand thread, and the internal thread of the second internal thread hole 1121 is also a left-hand thread. According to the above design, the eyelid spreader can be spread by rotating the fourth adjusting knob 32 along the W direction, and the eyelid spreader can be tightened by rotating the fourth adjusting knob 32 against the W direction.

[0062] The above describes the specific embodiments of the present invention. The following will provide two practical application processes of the present invention in combination with the above specific embodiments to facilitate understanding of the use and advantages of the present invention.

[0063] First, taking the corneal margin suture suturing operation as an example, the operated eye is defined as the right eye, the 3 o'clock position is defined as the nasal side, the 9 o'clock position is defined as the temporal side (temple side), the 0 o'clock position is defined as the upper eyelid side, and the 6 o'clock position is defined as the lower eyelid side. Before use, rotate the adjustment knob 32 to put the eyelid retractor in the minimum opening width state to reduce the discomfort when the eyelids are opened. When in use, hold the first retractor support arm 111 and the second retractor support arm 112, and put the "U"-shaped arc structure of the first eyelid retractor structure 121 and the second eyelid retractor knot 122 on the center of the upper and lower eyelids of the patient's right eye from the temporal side, and then turn the adjustment knob 32 to open the eyelid retractor until the patient's upper and lower eyelids are completely opened to expose the corneal margin. Observe the patient's corneal limbus position, rotate the first adjustment knob 61, and use the first corneal limbus positioning arc 41 on the first positioning scale 21 to determine the corneal limbus position at the 6 o'clock position; rotate the second adjustment knob 62, and use the second corneal limbus positioning arc 42 on the second positioning scale 22 to determine the corneal limbus position at the 0 o'clock position, align the zero scale of the first positioning scale 211 on the first positioning scale 21 and the zero scale of the second positioning scale 221 on the second positioning scale 22 with the corneal limbus, tighten the first adjustment knob 61 and the second adjustment knob 62, and the 0 o'clock and 6 o'clock positions are determined. Since the eyeball is spherical, the elliptical limbus is not all located in the same plane. The third adjustment knob 63 is rotated to adjust the third positioning scale support arm 53, and the third limbus positioning arc 43 is used to determine the limbus position at the 9 o'clock position. The third positioning scale 23 in the third slot 531 is adjusted, and the zero scale of the third positioning scale scale 231 on the third positioning scale 23 is aligned with the limbus. The 9 o'clock position is determined. The first limbus positioning arc 41, the second limbus positioning arc 42 and the third limbus positioning arc 43 can assist in fixing the easily sliding coverings on the corneal surface, such as amniotic membrane, biological membrane, etc., which can reduce the difficulty of operation, save operation time, and reduce operation damage. According to the actual requirements of the surgical operation or experiment, the 3 o'clock position can be further located. The specific implementation is: hold the first stretcher support arm 111 and the second stretcher support arm 112, rotate the adjustment knob 32 to put the eyelid stretcher in the minimum stretch width state, take out the eyelid stretcher from the temporal side, and then put the "U"-shaped arc structure of the first eyelid stretching structure 121 and the second eyelid stretching knot 122 on the center of the upper and lower eyelids of the patient's right eye from the nasal side, and then rotate the adjustment knob 32 to stretch the eyelid stretcher until the patient's upper and lower eyelids are completely stretched to expose the corneal margin.Observe the position of the patient's corneal limbus, rotate the first adjustment knob 61, and use the first corneal limbus positioning arc 41 on the first positioning scale 21 to determine the corneal limbus position at the 0 o'clock position; rotate the second adjustment knob 62, and use the second corneal limbus positioning arc 42 on the second positioning scale 22 to determine the corneal limbus position at the 6 o'clock position, align the zero scale of the first positioning scale scale 211 on the first positioning scale 21 and the zero scale of the second positioning scale scale 221 on the second positioning scale 22 with the corneal limbus, fix the first adjustment knob 61 and the second adjustment knob 62, and the 0 o'clock and 6 o'clock positions are determined. Rotate the third adjustment knob 63, adjust the third positioning scale support arm 53, use the third corneal limbus positioning arc 43 to determine the corneal limbus position at the 3 o'clock position, adjust the third positioning scale 23 in the third slot 531, and align the zero scale of the third positioning scale scale 231 on the third positioning scale 23 with the corneal limbus, and the 3 o'clock position is determined. The operation of the left eye is similar to that of the right eye.

[0064] Second, taking the intraocular injection operation as an example, after determining the 0 o'clock and 6 o'clock positions using the aforementioned method, rotate the third adjustment knob 63, adjust the third positioning scale support arm 53, and the third positioning scale 23 in the third slot 531, align the zero scale of the third positioning scale scale 231 on the third positioning scale 23 with the corneal limbus, rotate the rotating structure 232 so that the third positioning scale 23 is perpendicular to the fourth positioning scale 24, and the 3 o'clock position and Z-direction position positioning are completed. With the corneal limbus as a reference, locate the serration (for example, about 3.5-4mm outside the corneal limbus for adults) as the needle insertion point, determine the injection depth in the vitreous cavity (for example, the needle insertion depth is 5-7mm), measure the needle insertion depth of the syringe needle according to the fourth positioning scale 24 set in the Z direction and mark it, and complete the injection operation with a clear depth.

[0065] The above is mainly a description of the structural advantages of the present invention. The following are some applicable scenarios and advantages of the present invention in actual application: the first positioning ruler 21, the second positioning ruler 22, the third positioning ruler 23 and the fourth positioning ruler 24 can assist the operator to use the corneal limbus as a reference line, and through the movement of each positioning ruler along its corresponding axial direction, further locate the distance of the elliptical cornea at 0 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock positions to achieve the purpose of precise operation. Treatment operations for human eye diseases, such as fixation operations along the outer limbus, including amniotic membrane transplantation for ocular surface diseases such as corneal chemical burns or corneal ulcers, in addition to clearly positioning the four o'clock positions, the first limbus positioning arc 41, the second limbus positioning arc 42 and the third limbus positioning arc 43 can also assist the operator in fixing the amniotic membrane that is prone to slipping, thereby reducing the difficulty of the operation; standardized operations in animal experiments, such as the preparation of chronic glaucoma animal models (such as the anterior chamber injection of micromagnetic beads or hydrogels in the same o'clock direction, circumlimbal sutures (outer limbal suturing method), and compression of episcleral venous return) can also be used. In most operations, the positioning arc is used to position the corneal limbus and other ocular surface structures within a range of about 270° at three positions of 0 o'clock, 3 o'clock, and 6 o'clock, so that the uniformity of the operation position can be achieved and the uniformity of the experiment can be ensured; the positioning at the 9 o'clock position can be performed according to the operation needs. After the eyelid retractor is taken out, the eyelid is re-opened by rotating 180°, and the 9 o'clock position is positioned along the previously determined 0 o'clock, 3 o'clock, and 6 o'clock positions, that is, 360° positioning is achieved. The fourth positioning scale 24 set in the Z direction can be used for retinal disease treatment operations, such as anti-vascular endothelial growth factor intraocular injection treatment for exudative age-related macular degeneration, proliferative diabetic retinopathy or retinal vein occlusion combined with macular edema, high myopia secondary to choroidal neovascularization, neovascular glaucoma, etc., intravitreal anti-infective drug injection treatment for infectious endophthalmitis, and measurement of needle insertion depth when intravitreal injection is required for retinal disease animal models. The measurement accuracy of each scale is 0.5 mm, which can accurately locate the operation site on the ocular surface. The positioning scale group can choose different distances for positioning according to the differences in eye size of different individuals. While simplifying the corneal limbus positioning operation, it improves the accuracy of both suturing and injection operations, ensuring the same standard operation for drug treatment effects and scientific research operation requirements.

[0066] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the structural form of the present invention is not limited thereto. In order to avoid unnecessary repetition, various possible combinations within the technical concept of the present invention will not be described separately. However, these simple variations and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. An eyelid retractor, characterized in that: Including positioning ruler set and eyelid retractor skeleton structure, The eyelid spreader skeleton structure comprises a first spreader support arm (111) and a second spreader support arm (112), wherein the first spreader support arm (111) and the second spreader support arm (112) are cross-connected in a "V" shape; an adjustment structure (3) suitable for adjusting the opening width of the eyelid spreader is provided between the first spreader support arm (111) and the second spreader support arm (112); a first eyelid spreader structure (121) is provided or formed integrally with one end of the first spreader support arm (111) located at the "V"-shaped opening; a second eyelid spreader structure (122) is provided or formed integrally with one end of the second spreader support arm (112) located at the "V"-shaped opening; The positioning ruler group comprises a first positioning ruler (21), a second positioning ruler (22), a third positioning ruler (23) and a fourth positioning ruler (24), wherein the first positioning ruler (21) is arranged along the Y direction and is connected to the first eyelid opening structure (121) by a first positioning ruler support arm (51) arranged along the X direction; the second positioning ruler (22) is arranged along the Y direction and is connected to the second eyelid opening structure (122) by a second positioning ruler support arm (52) arranged along the X direction; the third positioning ruler (23) is arranged along the X direction and is connected to one end of the first positioning ruler support arm (51) by a third positioning ruler support arm (53) arranged along the Y direction; the fourth positioning ruler (24) is arranged along the Z direction and is arranged on one end of the third positioning ruler (23) away from the third positioning ruler support arm (53); The first eyelid stretching structure (121) and the second eyelid stretching structure (122) are both "U"-shaped arc structures, and the opening ends of the "U"-shaped arc structures of the two are arranged opposite to each other; the first positioning scale support arm (51) is fixed to or integrally formed at the opening end of the "U"-shaped arc structure of the first eyelid stretching structure (121), and the second positioning scale support arm (52) is fixed to or integrally formed at the opening end of the "U"-shaped arc structure of the second eyelid stretching structure (122); One end of the third positioning scale support arm (53) is provided with a third slot (531), and the other end of the third positioning scale support arm (53) is provided with a through hole (532); the third positioning scale support arm (53) is connected to one end of the first positioning scale support arm (51) by cooperating with the third adjustment knob (63) through the through hole (532).

2. The eyelid retractor according to claim 1, characterized in that: A first clamping slot (511) arranged along the Y direction is provided in the middle region of the first positioning scale support arm (51), and a first adjusting knob (61) is also provided in the middle region of the first positioning scale support arm (51); a second clamping slot (521) arranged along the Y direction is provided in the middle region of the second positioning scale support arm (52), and a second adjusting knob (62) is also provided in the middle region of the second positioning scale support arm (52).

3. The eyelid retractor according to claim 2, characterized in that: The first slot (511) is suitable for accommodating the first positioning scale (21), one end of the first positioning scale (21) is placed in the first slot (511), and can move in the first slot (511) along the Y direction, and the relative position is fixed by the first adjusting knob (61); the second slot (521) is suitable for accommodating the second positioning scale (22), one end of the second positioning scale (22) is placed in the second slot (521), and can move in the second slot (521) along the Y direction, and the relative position is fixed by the second adjusting knob (62).

4. The eyelid retractor according to claim 3, characterized in that: A first limbal positioning arc (41) is provided or formed integrally with one end of the first positioning scale (21) away from the first slot (511); a second limbal positioning arc (42) is provided or formed integrally with one end of the second positioning scale (22) away from the second slot (521).

5. The eyelid retractor according to claim 1, characterized in that: The third slot (531) is suitable for accommodating the third positioning scale (23); one end of the third positioning scale (23) is placed in the third slot (531) and can move in the third slot (531) along the X direction; and a third corneal limbus positioning arc (43) is provided or formed integrally on one end of the third positioning scale (23) away from the third positioning scale support arm (53); the fourth positioning scale (24) is fixed to one end of the third positioning scale (23) away from the third positioning scale support arm (53) by a rotating structure (232); and the rotation axis direction of the rotating structure (232) is arranged along the Y direction.

6. The eyelid retractor according to claim 1, characterized in that: The first positioning scale (21) is provided with a first positioning scale scale (211), the second positioning scale (22) is provided with a second positioning scale scale (221), the third positioning scale (23) is provided with a third positioning scale scale (231), and the fourth positioning scale (24) is provided with a fourth positioning scale scale (241), and the measurement accuracy of the first positioning scale scale (211), the second positioning scale scale (221), the third positioning scale scale (231) and the fourth positioning scale scale (241) are consistent.

7. The eyelid retractor according to any one of claims 1 to 6, characterized in that: The adjustment structure (3) comprises an adjustment rod (31) and a fourth adjustment knob (32); the fourth adjustment knob (32) is arranged on or integrally formed in a middle region of the adjustment rod (31); the adjustment rod (31) is a screw rod; and the screw threads on the adjustment rod (31) on both sides of the fourth adjustment knob (32) are designed in opposite directions.

8. The eyelid retractor according to claim 7, characterized in that: A first internal threaded hole (1111) arranged along the Y direction is provided in the middle region of the first spreader support arm (111); a second internal threaded hole (1121) arranged along the Y direction is provided in the middle region of the second spreader support arm (112), and the threads of the first internal threaded hole (1111) and the threads of the second internal threaded hole (1121) match the threads on the corresponding adjustment rods (31).

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