Lens column for artificial cornea
The mirror column design with angled edges and a detachable cosmetic plate addresses issues of tissue integration and dry eye by preventing biological growth and maintaining refractive function, enabling vision restoration without donor corneas.
Patent Information
- Application Number
- CN202421816829.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The artificial corneal columns of the prior art are prone to cause complications such as donor corneal necrosis and posterior proliferation membrane during implantation, and biological tissues are prone to cover the end surface of the mirror column, resulting in loss of refractive function.
An artificial corneal column is designed, including a column body, a rear disk and a beauty disk. The rear disk is arranged coaxially on the column body near the rear end. The beauty disk can be detached and arranged at the front end of the column body. The side bottom end of the column body is a square-edge structure to block the growth of biological tissue. The material of the column is polyhydroxyethyl methacrylate, polymethyl methacrylate, bioceramics or optical glass. The material of the beauty disk is resin, silicon hydrogel, etc., and the front end is equipped with an iris texture layer and a bulbous conjunctiva blood vessel texture layer. The outer periphery of the rear disk is equipped with an annular outer edge to prevent water leakage infection.
Effectively avoid biological tissue growing into the front end of the lens column, reduce complications, reduce tears evaporation, reduce dry eye symptoms, and achieve a single implantation to restore vision without the need for donor cornea.
Smart Images
Figure CN223095677U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of in - vivo prosthesis implantation, and particularly relates to a lens column for an artificial cornea. Background Technique
[0002] An artificial cornea refers to a special refractive device made of artificial synthetic materials, which is used to replace the cloudy cornea that hinders the optical path of the eyeball after disease, so that the patient can obtain a certain vision. The artificial cornea provided by the existing technology includes a lens column and a stent.
[0003] Among them, the main function of the lens column of the artificial cornea is to act as a refractive medium for light, accurately refract and focus the external light onto the retina to form a clear visual image. This is the most basic and important function of the lens column of the artificial cornea. For patients with vision loss or blindness caused by corneal diseases, the implantation of the lens column of the artificial cornea can significantly improve their vision and bring hope for restoration of vision.
[0004] The lens column for the artificial cornea provided by the existing technology not only requires a donor cornea during implantation, but also has problems such as complications such as necrosis of surrounding tissues, posterior proliferative membranes, and the loss of refractive function due to the growth of biological tissues covering the end face of the lens column. Content of the Utility Model
[0005] The purpose of the utility model is to provide a lens column for an artificial cornea, which can at least solve the problems existing in the prior art, such as the need for a donor cornea, multiple complications, and easy loss of refractive function.
[0006] In order to achieve the above - mentioned purpose, the utility model provides the following technical solution: The lens column for the artificial cornea includes a lens column body, a rear disc, and a cosmetic disc; the rear disc is coaxially arranged at a position close to the rear end face of the lens column body; the cosmetic disc is coaxially and detachably arranged on the front end face of the lens column body; the part of the lens column body behind the rear disc protrudes into the eye, and the side bottom end to the rear end face of the lens column body behind the rear disc is a square edge to prevent biological tissues from growing backward to the rear end face.
[0007] As a possible implementation manner, the square edge is at least one of a right - angled edge, an obtuse - angled edge, or an acute - angled edge.
[0008] As a possible implementation manner, the material of the lens column body is at least one of hydroxyethyl polymethacrylate, polymethyl methacrylate, bioceramics, or optical glass; the material of the rear disc is the same as that of the lens column body.
[0009] As a possible implementation manner, the rear disc and the lens column body are of an integrally formed structure;
[0010] When the beauty disc is a resin beauty disc, the beauty disc is threadedly connected to the lens column body, and the diameter of the lens column body at the connection is smaller than that of other parts of the lens column body; a notch for easy clamping is provided at the edge of the beauty disc.
[0011] As a possible implementation, the beauty disc is made of silicone hydrogel, hydrogel ionic material, or non-ionic material and is sleeved on the front end of the lens column body.
[0012] As a possible implementation, the diameter of the lens column body between the rear disc and the beauty disc is equal to the diameter of the part behind the rear disc, which is D1, and 2 mm ≤ D1 ≤ 3.5 mm; the diameter of the connection section between the lens column body and the beauty disc is 0.3 - 0.5 mm smaller than D1;
[0013] The diameter of the rear disc is D2, and 4 mm ≤ D2 ≤ 7.5 mm; the radius of curvature of the rear disc is 6.8 mm ± 0.5; the thickness of the rear disc is 0.3 - 0.5 mm;
[0014] The beauty disc is oval, with a major axis of 11 mm - 26 mm and a minor axis of 5.5 mm - 11 mm; the radius of curvature of the beauty disc is 12 mm ± 3.0 mm; the beauty disc has a structure that is thicker in the middle and thinner at both ends, and the maximum thickness is not more than 0.05 - 0.5 mm.
[0015] As a possible implementation, the axial vertical distance from the rear surface of the rear disc of the lens column body to the rear end face of the lens column body is defined as L1, and 1 mm ≤ L1 ≤ 2 mm;
[0016] The axial vertical distance from the front surface of the rear disc of the lens column body to the end of the threaded section is defined as L2, and 0.2 mm ≤ L2 ≤ 0.5 mm;
[0017] The threaded section where the lens column body is screwed to the bracket is defined as L3, and 3 mm ≤ L3 ≤ 5.5 mm.
[0018] As a possible implementation, the front end face of the lens column body is flush with or protrudes from the central opening of the beauty disc.
[0019] As a possible implementation, a circular outer edge is provided forward on the outer periphery of the rear disc to enclose the rear surface of the rear disc and the cornea, preventing water leakage and infection.
[0020] As a possible implementation, the lens column body behind the rear disc is one of an equal-diameter structure, a structure with a gradually decreasing diameter, or a structure with a gradually increasing diameter.
[0021] Compared with the prior art, the present utility model has the following effects:
[0022] 1. The beauty disc of the present utility model can prevent biological tissues from growing into the front end face of the lens column body, reducing the occurrence of complications such as posterior membranes.
[0023] 2. It reduces the evaporation of tears, reduces the degree of dry eye after surgery, and reduces the use of medications.
[0024] 3. Without the need for a donor cornea, a corneal blindness restoration treatment can be completed through a single implantation surgery.
[0025] 4. The non-threaded section of the side wall of the lens column has a hydroxyapatite coating layer, improving the healing property. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.
[0027] Figure 1 It is a schematic structural diagram of the lens column provided by the embodiment of the present utility model.
[0028] Reference Numerals:
[0029] 1 - lens column, 10 - lens column body, 11 - rear disc, 12 - beauty disc. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] In order to clearly describe the technical solutions of the embodiments of the present utility model, in the embodiments of the present utility model, terms such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. For example, the first threshold and the second threshold are only used to distinguish different thresholds and do not limit their sequence. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order, and "first", "second", etc. do not necessarily mean different.
[0031] It should be noted that in the present utility model, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present utility model should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner.
[0032] In the present utility model, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the relationship between associated objects and indicates that there can be three relationships. For example, A and / or B can represent the cases of A existing alone, A and B existing simultaneously, and B existing alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, the combination of a and b, the combination of a and c, the combination of b and c, or the combination of a, b, and c, where a, b, and c can be single or multiple.
[0033] See Figure 1 , an embodiment of the present utility model provides a lens column 1 for an artificial cornea, including a lens column body 10, a rear disc 11, and a cosmetic disc 12; the rear disc 11 is coaxially arranged at a position of the lens column body 10 close to the rear end face; the cosmetic disc 12 is coaxially and detachably arranged on the front end face of the lens column body 10; the part of the lens column body 10 behind the rear disc protrudes into the eye, and the corner between its side wall and the rear end face is a flat joint surface to prevent biological tissue from growing towards the rear end face.
[0034] The lens column body 10 constitutes an optical device for replacing the optical path of the eye, that is, light passes through the lens column body 10 and forms an image on the retina.
[0035] A cosmetic disc 12 is coaxially arranged at the front end of the lens column body 10, and a texture imitating a human eye is formed on the cosmetic disc 12, making the artificial cornea closer to a real human eye and improving the aesthetics. Moreover, it will not affect the refractive function that the artificial cornea must possess. The cosmetic disc 12 provided by the embodiment of the present utility model can prevent biological tissue from growing into the front end face of the lens column body 10, reducing the occurrence of complications such as posterior membranes, that is, reducing the adverse effects on the diopter of the lens column 1. The cosmetic disc 12 is equivalent to a barrier on the ocular surface placed outside the ocular surface, which can reduce tear evaporation, that is, can reduce the degree of dry eye after surgery and reduce the use of medications.
[0036] The iris texture layer and the texture layer imitating the conjunctival blood vessels are formed by applying image processing and 3D printing. That is, image processing technology is applied for feature extraction to generate images of the iris texture layer and the texture layer imitating the conjunctival blood vessels. Then 3D printing is applied to form the iris texture layer and the texture layer imitating the conjunctival blood vessels in the corresponding areas of the cosmetic disc 12. For example, high molecular density resin can be formed on the front surface of the cosmetic disc 12 through spraying or printing processes.
[0037] The iris texture layer and the texture layer imitating the conjunctival blood vessels are any one of a corneal contact lens, a contact lens, an iris covering piece, or colored contact lenses attached to the cosmetic disc 12.
[0038] The size of the beauty tray 12 is adapted to the size of the conjunctival sac. The beauty tray 12 can be an elliptical sheet structure with a certain curvature. Its major axis is 11 mm to 26 mm, and its minor axis is 5.5 mm to 11 mm. For example, the major axis is 11 mm and the minor axis is 5.5 mm, or the major axis is 26 mm and the minor axis is 11 mm.
[0039] The radius of curvature of the beauty tray 12 is 12 mm ± 3.0 mm. For example, specifically 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm or 15 mm.
[0040] The beauty tray 12 has a structure that is thicker in the middle and thinner at both ends. The material is resin, and the thickness is 0.05 to 0.5 mm. For example, the position of the beauty tray near the central hole is the thickest, and its thickness is 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm.
[0041] In order to facilitate the installation of the resin beauty tray 12 and the lens column body 10, a notch (not shown in the figure) for easy clamping can be provided at the edge of the resin beauty tray 12. The notches can be evenly distributed at intervals along the circumference of the resin beauty tray.
[0042] The beauty tray 12 is a resin beauty tray. An external thread is provided at the position of the lens column body 10 for installing the resin beauty tray, and the diameter is smaller than the diameter of other positions to form a limiting step; an internal thread is provided on the inner wall of the central hole of the beauty tray 12.
[0043] The pitch of the threaded section at the installation position of the resin beauty tray 12 is different from the pitch of the threaded section at the position for installing the bracket, so that the resin beauty tray 12 will not continue to rotate downward after being installed in place. That is, the threaded sections with different pitches can play a limiting role.
[0044] The beauty tray 12 is made of silicone hydrogel, hydrogel ionic material, or non-ionic material, and is sleeved on the front end of the lens column body 10. That is, the beauty tray 12 is a non-rigid beauty tray. In other words, the beauty tray 12 has a certain elasticity. The diameter of the central hole of the beauty tray 12 is smaller than the diameter of the position of the lens column body for installing the beauty tray. Using its own elasticity, the beauty tray 12 tightly wraps around the front end of the lens column body. With such a setting, it is not only convenient for assembly, but also does not affect the refractive vision field of the lens column body 10.
[0045] The front end face of the lens column body 10 is flush with or protrudes from the central opening of the beauty tray to minimize the adverse effect of the beauty tray on the refractive vision field of the lens column body.
[0046] The material of the lens post body 10 is the same as that of the rear disc, and they can be integrally formed, or the lens post body 10 and the rear disc 11 can be separately manufactured and then coaxially fastened and connected together by any method.
[0047] The part of the lens post body 10 in front of the rear disc can be a cylindrical structure with the same diameter from top to bottom, and an external thread section matching the internal thread of the bracket is provided at the position where it is screwed with the bracket from top to bottom.
[0048] The diameter of the lens post body 10 is smaller than that of the rear disc. Specifically, the diameter of the lens post body 10 is 2.0 - 3.5 mm. The diameter of the rear disc 11 is 2 - 4 mm larger than the diameter of the lens post body 10, that is, the diameter of the rear disc is 4 - 7.5 mm. For example, the diameter of the lens post body 10 is 2 mm and the diameter of the rear disc 11 is 4 mm; the diameter of the lens post body 10 is 3 mm and the diameter of the rear disc 11 is 5 mm; the diameter of the lens post body 10 is 3.5 mm and the diameter of the rear disc 11 is 7.5 mm.
[0049] In practical applications, the corneal diameter is 11 mm and the drilling diameter is 2.5 mm. The diameter of the rear disc 11 is less than or equal to the sum of the corneal radius and the radius of the lens post body 10.
[0050] The total length of the lens post body 10 is 4.5 - 8.5 mm. Among them, the distance from the rear disc 11 to the rear end face is 1 - 2 mm, the optical axis section from the rear disc to the end of the thread section is 0.2 - 0.5 mm, the rear disc is 0.3 - 0.5 mm, and the thread section is 3 - 5.5 mm.
[0051] The diopter of the lens post 1 is 42 - 62 D. For example, 42 D, 45 D, 50 D, 55 D, 60 D or 62 D.
[0052] The bottom end of the side surface of the lens post body 10 behind the rear disc to the rear end face is a square edge. With this setting, it is difficult for the biological tissue around the square edge to grow past the square edge to the rear end face, that is, it can prevent the continuously growing biological tissue from covering the rear end face of the lens post 1, thereby effectively avoiding the problem that the lens post cannot transmit light due to being covered by the continuously growing biological tissue.
[0053] The square edge is one of a right-angle edge, an obtuse-angle edge or an acute-angle edge. The lens post body behind the rear disc is one of an equal-diameter structure, a structure with a gradually decreasing diameter or a structure with a gradually increasing diameter.
[0054] The lens post body 10 behind the rear disc is one of an equal-diameter structure, a structure with a gradually decreasing diameter or a structure with a gradually increasing diameter.
[0055] A hydroxyapatite film layer is plated on the non-threaded section of the lens post body 10. When using atmospheric plasma spraying, the coating thickness is 30 - 150 microns and the bonding strength is at least 10 Mpa.
[0056] The outer periphery of the rear disc 11 is provided with an annular outer edge forward, which closes the rear disc and the posterior surface of the cornea to prevent water leakage and infection.
[0057] The material of the lens column body 10 and the rear row 11 is at least one of hydroxyethyl polymethacrylate, polymethyl methacrylate, bioceramics or optical glass.
[0058] Although the present utility model has been described in connection with various embodiments, however, in the process of implementing the claimed present utility model, those skilled in the art can understand and achieve other variations of the disclosed embodiments by viewing the drawings, the disclosure content, and the like. In the specification, the term "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit can implement several functions listed in the specification. Certain measures are recited in different embodiments, but this does not mean that these measures cannot be combined to produce good results.
[0059] Although the present utility model has been described in connection with specific features and their embodiments, it is obvious that various modifications and combinations can be made without departing from the spirit and scope of the present utility model. Accordingly, the present specification and the drawings are merely exemplary descriptions of the present utility model and are considered to have covered any and all modifications, variations, combinations, or equivalents within the scope of the present utility model. Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the present utility model and its equivalent technologies, the present utility model is also intended to include these changes and modifications.
Claims
1. A lens column for an artificial cornea, characterized in that, It includes a lens column body, a rear disc and a beauty disc; the rear disc is coaxially arranged at a position of the lens column body close to the rear end face; the beauty disc is coaxially and detachably arranged at the front end face of the lens column body; the part of the lens column body behind the rear disc protrudes into the eye, and the bottom end of the side surface of the lens column body behind the rear disc to the rear end face is a square edge to prevent biological tissue from growing towards the rear end face.
2. The lens column for artificial cornea according to claim 1, characterized in that, The square edge is at least one of a right-angle edge, an obtuse-angle edge or an acute-angle edge.
3. The lens column for artificial cornea according to claim 1, characterized in that, The material of the lens column body is at least one of hydroxyethyl polymethacrylate, polymethyl methacrylate, bioceramics or optical glass; the material of the rear disc is the same as that of the lens column body.
4. The lens column for artificial cornea according to claim 1, characterized in that, The rear disc and the lens column body are of an integrally formed structure; When the beauty disc is a resin beauty disc, the beauty disc is threadedly connected to the lens column body, and the diameter of the lens column body at the connection part is smaller than that of other parts of the lens column body; a notch for easy clamping is provided at the edge of the beauty disc.
5. The lens cylinder for artificial cornea according to claim 1, characterized in that, The beauty disc is made of silicone hydrogel, hydrogel ionic material or non-ionic material and is sleeved on the front end of the lens column body.
6. The lens cylinder for artificial cornea according to claim 1, characterized in that, The diameter of the lens column body between the rear disc and the beauty disc is equal to that of the section behind the rear disc, which is D1, and 2 mm ≤ D1 ≤ 3.5 mm; the diameter of the connection section of the lens column body and the beauty disc is 0.3 - 0.5 mm smaller than D1; The diameter of the rear disc is D2, and 4 mm ≤ D2 ≤ 7.5 mm; the radius of curvature of the rear disc is 6.8 mm ± 0.5; the thickness of the rear disc is 0.3 - 0.5 mm; The beauty disc is oval, with a major axis of 11 mm - 26 mm and a minor axis of 5.5 mm - 11 mm; the radius of curvature of the beauty disc is 12 mm ± 3.0 mm; the beauty disc has a structure with a thicker middle and thinner sides, and the maximum thickness is not more than 0.05 - 0.5 mm.
7. The lens cylinder for an artificial cornea according to claim 1, characterized in that, Define the axial vertical distance from the rear surface of the rear disc of the lens column body to the rear end face of the lens column body as L1, and 1 mm ≤ L1 ≤ 2 mm; Define the axial vertical distance from the front surface of the rear disc of the lens column body to the end of the threaded section as L2, and 0.2 mm ≤ L2 ≤ 0.5 mm; Define the threaded section where the lens column body is screwed to the bracket as L3, and 3 mm ≤ L3 ≤ 5.5 mm.
8. The lens column for an artificial cornea according to claim 6, wherein The front end face of the lens column body is flush with or protrudes from the central opening of the beauty disc.
9. The lens column for an artificial cornea according to claim 1, wherein An annular outer edge is provided forward on the outer periphery of the rear disc to enclose the rear surface of the rear disc and the cornea to prevent water leakage and infection.
10. The lens column for artificial cornea according to claim 1, characterized in that, The lens column body behind the rear disc is one of an equal-diameter structure, a structure with a gradually decreasing diameter or a structure with a gradually increasing diameter.