CN219230268U - Posterior chamber type intraocular lens with lens - Google Patents

Abstract

The utility model discloses a posterior chamber type intraocular lens with a lens, which comprises a lens main body and a supporting part, wherein the lens main body is of a transparent structure, the optical center of the lens main body is provided with a circular center hole, the supporting part is arranged on the periphery of the side surface of the lens main body, and the supporting part comprises a closed loop and loop feet arranged on the outer side of the closed loop; the four haptic feet are symmetrically arranged relative to the lens main body, the haptic holes are formed in the closed haptic close to the lens main body, an elliptical water guide hole is formed in the position, close to the haptic feet, of the closed haptic, the haptic feet are arranged in ciliary sulcus, and the water guide hole is arranged between the iris and the natural lens. When the intraocular lens is axially stressed, the elliptical water guide holes can disperse pressure, so that the movement of the intraocular lens is reduced, the included angle between the supporting part and the lens main body can be adjusted, the space of a posterior chamber is adapted, the contact of the intraocular lens with the anterior capsule and the iris of the lens is reduced, the anterior-posterior aqueous humor circulation of the intraocular lens is promoted to be smooth, and the surface and the angle deposition of the iris depigmentation and pigment are reduced.

Description

Posterior chamber type intraocular lens with lens

Technical Field

The utility model belongs to the technical field of production and manufacturing of intraocular lenses of crystalline eyes, and particularly relates to an intraocular lens of a posterior chamber type crystalline eye.

Background

The normal neonatal eye refractive state is hyperopia, the degree of hyperopia gradually decreases with age and the eye grows and develops, the refractive state gradually develops to positive, this change is called "positive visualization process", the vision after 5 years is 1.0, after that, physiological parameters of each part of the eye enter a relatively slow development process, and the size of the person is not achieved until about 12-13 years old. However, as children enter the school age stage, a large number of learning tasks increase the short-distance eye use time, so that the burden of eyes is gradually increased, and in addition, the use of modern tools such as mobile phones, computers, televisions and the like, the burden of eyes is further increased, and bad consequences such as myopia and the like are caused. According to related researches, the progressive deepening of the diopter of the high myopia, the progressive lengthening of the eye axis, and the progressive damage of the eye content and retina to cause visual dysfunction are one of the main causes of blindness.

There are many methods of correcting myopia. The frame glasses are convenient, economical and safe. But the exercise is inconvenient, has a certain influence on the natural appearance of the face, and is not acceptable to some people. The lens can not rotate along with the eyeball, the visual field is limited to a certain extent, and the lens is not suitable for certain professions, and a certain distance is reserved between the lens and the surface of the eyeball, so that the optical quality of correction is slightly poor, especially the lens with higher diopter can cause the reduction and deformation of a visual object, the correction of the high myopia has poor vision, and the person with heavier diopter is not easy to accept. The cornea contact lens has high imaging quality, small deformation of visual objects, beautiful wearing and convenient movement. But requires a certain skill for wearing. Because of direct contact with cornea, conjunctiva, tear film, etc., the lens cleaning process is complex, the damage is lost many and the service life is short, and long-term unreasonable wearing may cause eye health problems such as xerophthalmia, cornea neovascularization and even cornea infection. Laser surgery has become increasingly sophisticated in treating myopia and the effectiveness, safety and good predictability of treatment have been clinically accepted. However, for high myopia, especially for ultra high myopia patients, the predictability of the laser surgery correction of the high myopia is reduced due to the unknown and unpredictable cornea biomechanics, which can lead to the remarkable increase of parallax and the reduction of visual effect, and complications such as keratoconus, corneal opacity, effect rollback, xerophthalmia, poor postoperative visual quality and the like appear. Meanwhile, the laser operation has certain requirements on cornea thickness and the like, and the cutting of the cornea is irreversible.

In response to the deficiencies of the above-described techniques, the development of design and materials for implantable myopia correcting intraocular lenses has also begun. Posterior chamber phakic intraocular lens implantation is the implantation of an intraocular lens in the posterior chamber space to correct refractive errors without removal of any refractive tissue of the eye, including the cornea and natural lens. Existing posterior chamber type intraocular lens implants have a posterior chamber space between the anterior surface of the natural lens and the posterior surface of the iris with haptics being seated in the ciliary sulcus. However, because the space of the posterior chamber is limited, the support part with the lens of the posterior chamber type is close to the natural lens and the iris, the positioning hole of the existing posterior chamber type artificial lens is smaller, so that the iris pigment is easy to accumulate, and the occurrence rate of complications such as cataract, pupil blocking and the like is higher due to the deposition on the surface and the angle of the artificial lens; in addition, the posterior chamber type intraocular lens is extruded by the iris, so that the posterior chamber type intraocular lens is easy to move and the position is changed, the intraocular lens contacts the anterior capsule of the lens, and the imaging effect is poor.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide an intraocular lens with a lens in a posterior chamber. The lens avoids cataract, pupil blocking or angle closure glaucoma and the like caused by smooth aqueous humor circulation at the pupil after the existing posterior chamber type intraocular lens with the lens is implanted into the eye by arranging holes at different positions and optical centers of the closed loop.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the posterior chamber type intraocular lens comprises a lens main body and a supporting part, wherein the lens main body is of a transparent structure, the optical center of the lens main body is provided with a circular center hole, the supporting part is arranged on the periphery of the side surface of the lens main body and is fixedly connected with the lens main body, and the supporting part comprises a closed loop and loop feet arranged on the outer side of the closed loop; the four haptic feet are symmetrically arranged relative to the lens main body, haptic holes are formed in the closed haptic close to the lens main body, oval water guide holes are formed in positions, close to the haptic feet, of the closed haptic, the haptic feet are arranged in ciliary sulcus, and the water guide holes are formed between the iris and the natural lens.

The oval water guide hole is positioned between the iris and the anterior capsule of the natural crystalline lens, and is communicated with the aqueous humor at the front and the back of the posterior chamber type intraocular lens, so that the contact between the supporting part of the posterior chamber type intraocular lens and the iris and the anterior capsule of the crystalline lens can be reduced, and the de-coloring of the iris and the deposition of pigments on the surface and the angle of the posterior chamber type intraocular lens can be reduced. The oval water guide hole is close to the loop foot, and the pressure can be dispersed when the posterior chamber type intraocular lens with the lens is stressed, so that the anterior-posterior movement of the posterior chamber type intraocular lens with the lens in the eyeball is reduced, the position of the posterior chamber type intraocular lens with the lens is kept relatively constant, and the possibility that the posterior chamber type intraocular lens with the lens contacts the anterior capsule of the lens is reduced.

Further, positioning holes are formed in the loop feet.

Further, the positioning hole is circular.

Furthermore, the number of the positioning holes is two, and the positioning holes are respectively arranged on the two non-adjacent loop feet.

Further, the loop feet are arranged on the straight line of the optical center of the lens main body and the center of the water guide hole, and the straight line of the optical center of the lens main body and the center of the water guide hole is perpendicular to the straight line of the long axis of the water guide hole.

Further, the closed haptics are disposed obliquely to the exterior of the optic body.

Further, the included angle between the plane of the closed loop and the plane of the lens main body is 10-20 degrees.

Further, the loop feet are on the same plane, and the loop feet are symmetrically arranged at two ends of the closed loop.

Further, the side periphery of the lens body is circular with a diameter of 4.5-6.0mm.

Further, the lens body is a plano-concave lens.

Further, the lens body is a concave lens with a center thickness of 0.05mm-0.5 mm.

Further, the diameter of the central hole is 0.1 mm-0.5 mm.

Further, the lens body and the support are both made of a hydrophilic polyacrylate material.

The hydrophilic polyacrylate material is soft and easy to fold, the refractive index is between 1.430 and 1.490, and the lens is thin and convenient to implant into the posterior chamber of an eye.

Compared with the prior art, the utility model has the following beneficial effects:

through the technical scheme, after the posterior chamber type intraocular lens with the lens is implanted into a human eye, the soft material and the elliptic water guide holes close to the haptic feet can adjust the included angle formed by the supporting part and the lens main body so as to better adapt to the posterior chamber space and prevent the anterior surface of the lens and the posterior surface of the iris from being contacted. The central hole, the loop holes and the oval water guide holes ensure smooth aqueous humor circulation at the pupil after being implanted into the eye, and prevent cataract, pupil blocking or angle-closure glaucoma and the like. The oval water guide hole is positioned between the iris and the anterior lens capsule and is communicated with the anterior and posterior aqueous humor of the posterior chamber type intraocular lens, so that the contact between the supporting part of the posterior chamber type intraocular lens with the iris and the anterior lens capsule can be reduced, and the depigmentation of the iris and the deposition of pigment on the surface and the angle of the posterior chamber type intraocular lens with the lens can be reduced. The oval water guide hole is close to the loop foot, and the pressure can be dispersed when the posterior chamber type intraocular lens with the lens is stressed, so that the anterior-posterior movement of the posterior chamber type intraocular lens with the lens in the eyeball is reduced, the position of the posterior chamber type intraocular lens with the lens is kept relatively constant, and the possibility that the posterior chamber type intraocular lens with the lens contacts the anterior capsule of the lens is reduced.

Drawings

Fig. 1 is a schematic front view of a posterior chamber type intraocular lens of the present utility model.

Fig. 2 is a schematic side view of a posterior chamber type intraocular lens of the present utility model.

Fig. 3 is a schematic view of the posterior chamber type intraocular lens implantation site of the present utility model.

In the figure, 1 is a lens main body; 2 is a supporting part; 3 is a central hole; 4 is a closed loop; 5 are loop feet; 6 are loop holes; 7 is a water guide hole; 8 is a positioning hole; 9 is the central axis of the lens main body; 10 is cornea, 11 is iris, 12 is posterior chamber type intraocular lens, 13 is natural lens, 14 is ciliary sulcus; 15 is the room angle; 16 is the anterior capsule of the crystal.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Unless specifically stated otherwise, the reagents, methods and apparatus employed in the present utility model are those conventional in the art.

Example 1

1-2, a posterior chamber type intraocular lens with lens comprises a lens main body 1 and a supporting part 2, wherein the lens main body 1 is of a transparent structure, the optical center of the lens main body 1 is provided with a circular center hole 3, the optical center is the intersection point of a central axis 9 of the lens main body and the lens main body 1, the supporting part 2 is arranged on the periphery of the side surface of the lens main body 1 and is fixedly connected with the lens main body 1, and the supporting part 2 comprises a closed loop 4 and loop feet 5 arranged on the outer side of the closed loop 4; the number of the loop feet 5 is four, the loop feet 5 are symmetrically arranged relative to the lens main body 1, loop holes 6 are formed in the closed loop 4 close to the lens main body 1, oval water guide holes 7 are formed in the closed loop 4 close to the loop feet 5, the loop feet 5 are arranged in ciliary sulcus 14, and the water guide holes 7 are arranged between the iris 11 and the natural lens 13.

In a specific implementation, after the posterior chamber type intraocular lens 12 is implanted, the oval water guide hole 7 of the present utility model is located between the iris 11 of the eyeball and the anterior lens capsule 16, and communicates with the aqueous humor in front of and behind the posterior chamber type intraocular lens 12, so that the contact between the supporting part 2 of the posterior chamber type intraocular lens 12 and the iris 11 and the anterior lens capsule 16 can be reduced, and the precipitation of the iris depigmentation and pigment on the surface and the angle 15 of the posterior chamber type intraocular lens 12 can be reduced. The oval shaped water guide aperture 7 is adjacent the haptic feet 5 and the posterior chamber type IOL 12 disperses pressure when subjected to force, reducing anterior-posterior movement of the posterior chamber type IOL 12 within the eye, maintaining the position of the posterior chamber type IOL 12 relatively constant and reducing the likelihood of the posterior chamber type IOL 12 contacting the anterior lens capsule 16.

Example 2

1-3, a posterior chamber type intraocular lens with lens comprises a lens main body 1 and a supporting part 2, wherein the lens main body 1 is of a transparent structure, the periphery of the side surface of the lens main body 1 is of a round shape, the diameter of the lens main body is 4.5-6.0mm, the lens main body 1 is a plano-concave lens, and the lens main body 1 is a concave lens with the center thickness of 0.05-0.5 mm; the optical center of the lens main body 1 is provided with a circular center hole 3, and the diameter of the center hole 3 is 0.1 mm-0.5 mm. The supporting part 2 is arranged on the periphery of the side face of the lens main body 1 and is fixedly connected with the lens main body 1, the closed loop 4 is obliquely arranged, and the included angle between the plane where the closed loop 4 is positioned and the plane where the lens main body 1 is positioned is 10-20 degrees. The support 2 comprises a closed loop 4 and a loop foot 5 arranged outside the closed loop 4; the number of the loop feet 5 is four, the loop feet 5 are symmetrically arranged relative to the lens main body 1, the loop feet 5 are arranged on the same plane, the loop feet 5 are symmetrically arranged at two ends of the closed loop 4, loop holes 6 are formed in the closed loop 4 and close to the lens main body 1, oval water guide holes 7 are formed in positions, close to the loop feet 5, of the closed loop 4, the loop feet 5 are arranged in ciliary sulcus 14, circular positioning holes 8 are formed in the loop feet 5, the two positioning holes 8 are respectively arranged on the two non-adjacent loop feet 5, the water guide holes 7 are formed between the iris 11 and the natural lens 13, and the lens main body 1 and the support 2 are made of the same hydrophilic polyacrylate material.

In a specific implementation, optic body 1 of posterior chamber phakic intraocular lens 12 is a plano-concave lens comprising a plane and a concave surface, the surface of posterior chamber phakic intraocular lens 12 facing cornea 10 when implanted in the eye being the plane of the plano-concave lens, and the surface facing the retina being the concave surface of the plano-concave lens. When viewed from the back, the plano-concave lens is oriented with its plane facing upward, and preferably with the positioning hole 8 located on the right upper left lower diagonal. The included angle between the plane of the supporting part 2 and the plane of the lens main body 1 is 10-20 degrees, so that the whole lens is in a sphere-like shape. The transparent lens main body 1 is a concave lens with the diameter of 4.5-6.0mm and the center thickness of 0.05-0.5mm, and the lens main body 1 can be suitable for groups with different eyeball sizes and needing vision correction, and the center thickness can be suitable for groups with different degrees; preferably, the lens body 1 has a diameter of 4.5mm and a center thickness of 0.05; preferably, the lens body 1 has a diameter of 4.5mm and a center thickness of 0.2; preferably, the lens body 1 has a diameter of 5mm and a center thickness of 0.4; preferably, the lens body 1 has a diameter of 6mm and a center thickness of 0.5; the center of the lens body 1 is provided with a center hole 3 with the diameter of 0.1-0.5mm, the center hole 3 is smaller in diameter within the range, and the smaller-diameter center hole 3 does not influence the imaging quality of the transparent lens body 1, and the postoperative visual quality is almost the same as that of a non-porous lens. Two loop holes 6 are formed in the closed loop 4 near the lens main body 1, and an elliptical water guide hole 7 is formed in the closed loop 4 near the loop feet 5.

Figure 3 shows the location of implantation of posterior chamber type phakic intraocular lens 12 in an eye. After implantation of posterior chamber phakic intraocular lens 12 in the eye, haptic feet 5 are positioned within ciliary sulcus 14 and central aperture 3 and two haptic apertures 6 are in fluid communication with anterior and posterior surfaces of central posterior chamber phakic intraocular lens 12. The oval water guide holes 7 are close to the positions of the haptic feet 5, can communicate with the aqueous humor circulation, reduce the contact between the supporting part 2 of the posterior chamber type intraocular lens 12 and the iris 11 and the anterior lens capsule 16, and reduce the de-pigmenting of the iris and the deposition of pigments on the surface and the angle 15 of the posterior chamber type intraocular lens 12. The eye can stress the posterior chamber type phakic intraocular lens 12 when adjusting blink, the oval water guide hole 7 can disperse pressure, the anterior and posterior movement of the posterior chamber type phakic intraocular lens 12 in the eyeball is reduced, the position of the posterior chamber type phakic intraocular lens 12 is kept relatively constant, the anterior chamber type phakic intraocular lens 12 is prevented from excessively advancing to contact the cornea 10 or excessively retreating to contact the natural lens 13, and the posterior chamber type phakic intraocular lens 12 is safer.

Example 3

Based on embodiment 2, with reference to fig. 1, the haptic feet 5 are disposed on a line between the optical center of the circular lens body 1 and the center of the elliptical water guide hole 7, and the line between the optical center of the lens body 1 and the center of the water guide hole 7 is perpendicular to the line between the long axis of the water guide hole 7. After the intraocular lens is implanted, the human eye can make the posterior chamber type intraocular lens 12 stressed when adjusting blinking, the stressed force can be finally transmitted from the closed loop 4 to the posterior loop foot 5, the loop foot 5 arranged on the straight line between the optical center of the lens main body 1 and the center of the elliptic water guide hole 7 is used for bearing force, the straight line between the optical center of the lens main body 1 and the center of the water guide hole 7 is perpendicular to the straight line between the long axis of the water guide hole 7 and can disperse stress, and by changing the direction of force, part of pressure is used for deforming the closed loop 4, so that the force reaching the loop foot 5 finally is greatly reduced, the anterior and posterior movement of the posterior chamber type intraocular lens 12 in the eyeball is reduced, the position of the posterior chamber type intraocular lens 12 is kept relatively constant, the posterior chamber type intraocular lens 12 is prevented from excessively moving forward to contact the cornea 10 or excessively moving backward to contact the natural lens 13, and the posterior chamber type intraocular lens 12 is safer.

The above examples are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present utility model should be made in the equivalent manner, and the embodiments are included in the protection scope of the present utility model.

Claims (10)

1. The posterior chamber type intraocular lens with the lens is characterized by comprising a lens main body (1) and a supporting part (2), wherein the lens main body (1) is of a transparent structure, a circular center hole (3) is formed in the optical center of the lens main body (1), the supporting part (2) is arranged on the periphery of the side face of the lens main body (1) and fixedly connected with the lens main body (1), and the supporting part (2) comprises a closed loop (4) and loop feet (5) arranged on the outer side of the closed loop (4); the number of the loop feet (5) is four, the loop holes (6) are symmetrically arranged relative to the lens main body (1) and are formed in the closed loop (4) close to the lens main body (1), elliptical water guide holes (7) are formed in positions, close to the loop feet (5), of the closed loop (4), the loop feet (5) are arranged in ciliary grooves (14), and the water guide holes (7) are formed between the iris (11) and the natural crystalline lens (13).

2. Posterior chamber intraocular lens according to claim 1, characterized in that the haptic feet (5) are provided with positioning holes (8).

3. Posterior chamber type intraocular lens according to claim 2, characterized in that said positioning holes (8) are two, respectively provided on two haptic feet (5) which are not adjacent.

4. The posterior chamber type intraocular lens according to claim 1, wherein the haptic feet (5) are disposed on a line between the optical center of the optic body (1) and the center of the water-guiding hole (7), and the line between the optical center of the optic body (1) and the center of the water-guiding hole (7) is perpendicular to the line of the long axis of the water-guiding hole (7).

5. Posterior chamber type intraocular lens according to claim 1, wherein the closed haptics (4) are arranged obliquely to the exterior of the optic body (1).

6. Posterior chamber type intraocular lens according to claim 1, wherein the angle between the plane of the closed haptics (4) and the plane of the optic body (1) is 10-20 degrees.

7. Posterior chamber type intraocular lens according to claim 1, characterized in that the lateral periphery of the lens body (1) is circular with a diameter of 4.5-6.0mm.

8. Posterior chamber type intraocular lens according to claim 1, characterized in that the optic body (1) is a plano-concave lens.

9. Posterior chamber type intraocular lens according to claim 1, characterized in that the optic body (1) is a concave lens with a central thickness of 0.05mm-0.5 mm.

10. Posterior chamber type intraocular lens according to claim 1, characterized in that the central aperture (3) has a diameter of 0.1 mm-0.5 mm.

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