CN215778913U

CN215778913U - Foldable eccentric-resistant suspensible intraocular lens

Info

Publication number: CN215778913U
Application number: CN202121468640.7U
Authority: CN
Inventors: 张明瑞; 史小文; 赵紫微; 张艳; 王明坤; 郭培丽; 晏飞燕
Original assignee: TIANJIN CENTURY KANGTAI BIO-MEDICAL ENGINEERING CO LTD
Current assignee: TIANJIN CENTURY KANGTAI BIO-MEDICAL ENGINEERING CO LTD
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-02-11
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses a foldable eccentricity-resistant suspensible intraocular lens, which comprises a lens body, wherein the lens body comprises an aspheric optical surface with zero spherical aberration and closed/plate-shaped haptics which are oppositely arranged at two ends of the optical surface and are used for supporting the optical surface; the aspheric optical surface with zero spherical aberration can properly reduce the imaging quality reduction caused by the surgical effect and the crystal decentration caused by healing, can properly reduce the imaging quality reduction caused by the surgical effect and the crystal tilt caused by healing, and even when decentered, does not introduce coma aberration; the closed/plate-shaped loop is beneficial to threading and suspension operation, the loop has smooth edges, a threading hole for suspending the optical surface is arranged on the loop, a polypropylene suture thread passes through the sclera and is sewed and fixed in the ciliary sulcus, the included angle between the two loops and the plane of the optical surface is 0 degree, and the two loops are arranged in a rotational symmetry or mirror symmetry way relative to the central axis of the optical surface; the lens body is made of hydrophilic acrylate materials or hydrophobic acrylate materials, the diameter of the lens body is 11 mm-13.5 mm, and the diameter of the optical surface is 6.0 mm-6.5 mm.

Description

Foldable eccentric-resistant suspensible intraocular lens

Technical Field

The utility model belongs to the technical field of intraocular lenses, and particularly relates to a foldable eccentricity-resistant intraocular lens capable of being suspended.

Background

Complications such as rupture of posterior capsule, rupture of crystalline zonules, rupture of capsule after severe ocular traumatic cataract, absence of posterior capsule support after complex vitreoretinopathy phacoectomy, etc. occur in cataract surgery, at which time a conventional lens cannot be implanted, requiring implantation of a suspensible intraocular lens.

The traditional spherical artificial lens has positive spherical aberration, and the total spherical aberration of human eyes is increased on the basis of the positive spherical aberration of a cornea, so that the postoperative visual quality is influenced. Therefore, to obtain a better visual effect for the patient, the total spherical aberration of the post-operative eye is reduced. The aspheric artificial lens is developed based on the theory, and has zero spherical aberration or negative spherical aberration through the aspheric design of the surface of the lens, so that the total spherical aberration of the postoperative eye is at a lower level, the problem of contrast reduction of the common spherical artificial lens under the condition of a large pupil is solved, and the visual ability under dim light and night environment is improved. The model Tecnis Z900 intraocular lens from AMO was the first intraocular lens capable of producing negative spherical aberration, producing negative spherical aberration of-0.27 μm, equal to the average spherical aberration statistic of the cornea, and was designed with the concept of completely canceling the positive spherical aberration of the cornea. The aspherical intraocular lens Acrysof SN60WF, designed by Alcon corporation, was designed aspherically on the posterior optic surface to produce a negative spherical aberration of-0.2 μm, intended to maintain a certain amount of positive spherical aberration for the entire eye for better visual comfort. Bausch & Lomb incorporated introduced aspheric intraocular lenses known as SofPort AO and AkreoSaO, which are themselves aberration-free and do not introduce additional spherical aberration to the entire human eye, also known as homospherical aberration crystals.

However, the-0.27 μm negative spherical aberration aspheric lens is very sensitive to decentration and inclination of the lens during the implantation and postoperative healing processes, even if the decentration is slight, the diffraction limited characteristic of the aspheric lens can disappear, and when the intraocular lens is slightly deviated or inclined, the negative spherical aberration intraocular lens is slightly deviated or inclined, the influence on the intraocular visual quality is large, so that the accuracy and precision requirements of the implantation operation of the lens are very high.

In view of the above, the present invention is particularly proposed.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model aims to provide a foldable eccentric-resistant suspensible intraocular lens which is simple in structure, reasonable in design, convenient for accurate positioning of the intraocular lens and good in postoperative effect.

In order to achieve the above object, the present invention provides a foldable intraocular lens capable of resisting eccentricity and being suspended, comprising a lens body, wherein the lens body comprises an aspheric optical surface with zero spherical aberration and closed/plate-shaped haptics which are oppositely arranged at two ends of the optical surface and used for supporting the optical surface, the haptics have smooth edges, threading holes for suspending the optical surface are arranged on the haptics, an included angle between the two haptics and the plane of the optical surface is 0 °, and the two haptics are rotationally symmetric or mirror-symmetric about the central axis of the optical surface.

Preferably, the material of the lens body is hydrophilic acrylate material or hydrophobic acrylate material;

preferably, the diameter of the lens body is 11 mm-13.5 mm, and the diameter of the optical surface is 6.0 mm-6.5 mm;

preferably, the haptics are square, oval or contoured in shape;

preferably, the threading hole is circular or irregular in shape.

The folding type eccentricity-resistant intraocular lens capable of being suspended has the following beneficial effects:

the utility model effectively avoids the technical problems that when the complications such as rupture of a posterior capsule membrane, rupture of a crystalline suspensory ligament, rupture of a capsular membrane after severe traumatic cataract of eyes and no posterior capsule membrane support after complex vitreoretinopathy phakiectomy exist in the prior art, when a C-shaped loop or an L-shaped loop is used for suspension, a suture line is not easy to fix an artificial lens and is easy to fall off and easily deviate or incline, the artificial lens adopts a structure that an optical surface with zero spherical aberration of an aspheric surface and closed type/plate-shaped loops which are oppositely arranged at two ends of the optical surface and are used for supporting the optical surface are combined, the optical surface with zero spherical aberration of the aspheric surface effectively improves the visual ability of a patient in dark light and at night, the spherical aberration design of the zero spherical aberration does not increase or reduce the spherical aberration in eyes, is suitable for the situation of corneal spherical aberration of all patients, and is particularly suitable for aphakic patients without capsular support after cataract surgery, even if the artificial lens slightly deviates or inclines, the influence on the visual quality in eyes is small, even when the artificial lens is eccentric, coma is not introduced, so that the influence of the eccentricity and the inclination of the lens on the imaging quality can be effectively reduced, meanwhile, the spherical aberration excessive correction caused by the individual difference of the spherical aberration of the cornea is avoided by the design of the zero spherical aberration, the artificial lens is suitable for all shapes of the cornea, the positive spherical aberration of the cornea is kept, the focal depth of the eyes is increased, the intermediate vision can be improved, and the artificial lens better meets the requirements of human engineering. Then, the shape of the loop of the closed loop/plate-shaped loop is square, oval or special, so that the occurrence of posterior barriers can be reduced, the lens is centered in the capsular bag, and the stability is good. Moreover, due to the specific structural advantages defined by the utility model, the intraocular lens is more stable and more eccentric-resistant after being implanted into eyes, the influence on the visual quality in the eyes is smaller, the postoperative visual quality is far better than other suspension type intraocular lenses, the surgical incision is small, the recovery is fast, the postoperative reaction is light, the astigmatism is smaller, and the recovery time is fast.

Drawings

Figure 1 is a first schematic diagram of a foldable, eccentricity-resistant, suspendable intraocular lens according to the present invention.

Figure 2 is a schematic diagram of a first configuration of a foldable, eccentricity-resistant, suspendable intraocular lens according to the present invention.

Figure 3 is a schematic diagram of a first configuration of a foldable, eccentricity-resistant, suspendable intraocular lens according to the present invention.

In the figure:

1. optical surface 2, loop 3, threading hole 4 and polypropylene thread.

Detailed Description

The present invention will be further described with reference to the following specific embodiments and accompanying drawings to assist in understanding the contents of the utility model.

As shown in FIGS. 1-3, the foldable, eccentricity-resistant, suspendable intraocular lens provided by the present invention comprises a lens body comprising an aspheric, zero-spherical-aberration optical surface 1 and closed/plate-shaped haptics 2 disposed opposite each end of the optical surface 1 and supporting the optical surface 1. The aspherical optical surface 1 having zero spherical aberration can suitably reduce the imaging quality deterioration caused by the surgical effect and the crystal decentering caused by healing, can suitably reduce the imaging quality deterioration caused by the surgical effect and the crystal tilt caused by healing, and does not introduce coma even when decentered. The closed/plate-shaped loop 2 is beneficial to threading and suspension operation, the loop 2 has smooth edges, a threading hole 3 for suspending the optical surface 1 is arranged on the loop 2, a polypropylene suture 4 passes through the threading hole 3 and is sewed and fixed in a ciliary ditch through a transscleral, the included angle between the two loops 2 and the plane of the optical surface 1 is 0 degree, and the two loops 2 are arranged in rotational symmetry or mirror symmetry relative to the central axis of the optical surface 1. The lens body is made of hydrophilic acrylate materials or hydrophobic acrylate materials, the diameter of the lens body is 11 mm-13.5 mm, and the diameter of the optical surface 1 is 6.0 mm-6.5 mm. The haptics 2 may be square, oval or contoured, such as C-shaped haptics 2 shown in fig. 1, square haptics 2 shown in fig. 2 and oval haptics 2 shown in fig. 3. The threading hole 3 is round or irregular.

The utility model effectively avoids the technical problems that when the open C-shaped loop 2 or the L-shaped loop 2 is used for suspension, a suture line is not easy to fix the artificial lens and is easy to fall off and shift or incline when the complications such as rupture of a posterior capsule, rupture of a crystalline suspensory ligament, rupture of a capsular diaphragm after severe traumatic cataract of eyes and no posterior capsule support after complex vitreoretinopathy phacoectomy exist in cataract surgery in the prior art, the artificial lens adopts a structure that the aspheric optical surface 1 with zero spherical aberration and the closed/plate-shaped loop 2 which is oppositely arranged at two ends of the optical surface 1 and is used for supporting the optical surface 1 are combined, the aspheric optical surface 1 with zero spherical aberration effectively improves the visual ability of a patient in dark light and night environment, the zero spherical aberration design does not increase or reduce the spherical aberration in eyes, and is suitable for the corneal spherical aberration of all patients, the method is particularly suitable for aphakic patients without capsular sac support after cataract aspiration, even if the intraocular lens slightly deviates or inclines, the influence on the visual quality in eyes is small, even when the intraocular lens is eccentric, coma is not introduced, therefore, the influence of the eccentricity and the inclination of the lens on the imaging quality can be effectively reduced, meanwhile, the design of zero spherical aberration avoids the spherical aberration over-correction caused by the individual difference of the corneal spherical aberration, the method is suitable for all corneal shapes, the corneal spherical aberration is kept, the focal depth of the eyes is increased, the intermediate vision can be improved, and the requirements of human engineering are better met. Then, the shape of the loop 2 of the closed type/plate type loop 2 is square, oval or special, so that the occurrence of posterior barriers can be reduced, the crystal is centered in the capsular bag, and the stability is good. Moreover, due to the specific structural advantages defined by the utility model, the intraocular lens is more stable and more eccentric-resistant after being implanted into eyes, the influence on the visual quality in the eyes is smaller, the postoperative visual quality is far better than other suspension type intraocular lenses, the surgical incision is small, the recovery is fast, the postoperative reaction is light, the astigmatism is smaller, and the recovery time is fast.

The present invention has been described in detail with reference to specific embodiments, which are provided to assist in understanding the core concepts of the present invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are intended to be included within the scope of the present invention.

Claims

1. The foldable type eccentricity-resistant intraocular lens capable of being suspended is characterized by comprising a lens body, wherein the lens body comprises an aspheric optical surface with zero spherical aberration and closed type/plate type haptics which are oppositely arranged at two ends of the optical surface and used for supporting the optical surface, the haptics are provided with smooth edges, threading holes used for suspending the optical surface are formed in the haptics, the included angle between the two haptics and the plane of the optical surface is 0 degree, and the two haptics are arranged in a rotational symmetry or mirror symmetry mode relative to the central axis of the optical surface.

2. The foldable, eccentricity-resistant, suspendable intraocular lens according to claim 1, wherein the lens body is made of a hydrophilic acrylate material or a hydrophobic acrylate material.

3. The foldable, eccentricity-resistant, suspendable intraocular lens as claimed in claim 1, wherein the diameter of the lens body is 11mm to 13.5mm and the diameter of the optical surface is 6.0mm to 6.5 mm.

4. A foldable, eccentricity-resistant, suspendable intraocular lens as claimed in claim 1, wherein said haptics are square, oval or profiled in shape.

5. The foldable, eccentricity-resistant, suspendable intraocular lens as claimed in claim 1, wherein said threading holes are circular or irregular in shape.