CN109124828B

CN109124828B - Scleral fixed intraocular lens and alignment method thereof

Info

Publication number: CN109124828B
Application number: CN201811042769.4A
Authority: CN
Inventors: 曾宗圣; 李孟琼; 欧阳文博; 张广斌
Original assignee: Xiamen Eye Center Co ltd
Current assignee: Xiamen Eye Center Co ltd
Priority date: 2018-09-05
Filing date: 2018-09-05
Publication date: 2024-04-23
Anticipated expiration: 2038-09-05
Also published as: CN109124828A

Abstract

The invention discloses a sclera fixed artificial lens and an alignment method thereof, wherein the sclera fixed artificial lens comprises an artificial lens optical part and two loop parts; the inner ends of the two loops are respectively and tightly connected with the two sides of the optical part of the artificial lens, the tail ends of the loops are provided with two grooves which encircle the whole circumference, the two grooves are arranged at intervals, and the outer grooves are close to the tail ends of the loops. Because the two haptic ends of the original three-body type artificial lens are designed into double-groove shape, the outer groove is positioned at the haptic end of the artificial lens, thereby being convenient for fixing the artificial lens between sclera layers, the thread can be knotted in the outer groove of the haptic, the suture is adopted to guide the artificial lens to enter the pre-manufactured sclera tunnel, the artificial lens sclera fixing operation becomes less traumatic, and the implantation of the haptic between sclera layers is easy.

Description

Scleral fixed intraocular lens and alignment method thereof

Technical Field

The invention relates to the medical field, in particular to a scleral fixed artificial lens and an alignment method thereof.

Background

At present, the cataract operation basically adopts a lens for retaining a posterior capsule of the lens to remove turbidity to implant the intraocular lens into a capsular bag, but when the separation range of the zonules of the lens exceeds 180 degrees and even the capsular bag of the lens is deficient, methods such as intraocular lens suspension (suture fixation), iris clamping type intraocular lens implantation and the like are often adopted, but the problems of complex operation such as the need of manufacturing sclera flaps, difficulty in intraocular lens fixation and the like exist, and meanwhile, the possibility of dislocation of the intraocular lens again (such as suture absorption) also increases the probability of damaging corneal endothelium, iris and other complications. The fixation between sclera layers of an intraocular lens is another method for solving the problems, and generally, a three-body intraocular lens (two haptics are made of PMMA materials) is used, the implantation process is complex, and scleral flaps are also required to be manufactured, wherein the step of clamping the haptics from the inside of the eye to the outside of the eye through the sclera is difficult and time-consuming to operate, the neutrality and the stability of the intraocular lens are difficult to ensure, and other tissues of the eye are easy to damage. In addition, sutures or bio-glue are used to close the sclera and conjunctiva after the intraocular lens haptics are secured.

Disclosure of Invention

The invention aims to provide a scleral fixed artificial lens which is easy to suture and fix and is stable in the middle of the artificial lens.

In order to achieve the above object, the technical solution of the present invention is:

The invention relates to a scleral fixed artificial lens, which comprises an artificial lens optical part and two loop parts; the inner ends of the two loops are respectively and tightly connected with the two sides of the optical part of the artificial lens, the tail ends of the loops are provided with two grooves which encircle the whole circumference, the two grooves are arranged at intervals, and the outer grooves are close to the tail ends of the loops.

The loop between the two grooves is in a tooth shape or a thread shape so as to be firmly connected with the wall of the sclera tunnel after entering the sclera tunnel.

The loop is in a shape of C.

The invention relates to an aligning method of a scleral fixed artificial lens, which comprises the following steps:

(1) Before the intraocular lens is implanted into the eye, binding two nylon wires on the grooves on the outer sides of the two loop, the tail ends and the outer sides of the two loop to serve as traction wires, and then placing the traction wires into an intraocular lens implanter;

(2) Prefabricating sclera tunnels, namely marking two marking points which enter the eye from outside the sclera on conjunctiva at an angle of 80 degrees at the position of a distance of mm behind scleral limbus, respectively taking the marking points as inlets and being parallel to the scleral limbus, and manufacturing the sclera tunnels which pass through the sclera layers by using needles, wherein the directions of the two sclera tunnels are the same as the pointing directions of subsequently implanted loop pieces;

(3) The method comprises the steps of implanting two loop pieces into a transparent cornea incision or a sclera tunnel incision, firstly introducing the left loop piece with the left pulling wire into the eye, placing the right loop piece with the right pulling wire outside the eye, using a needle to pass through the conjunctiva from a primary marking point to enter the eye through the left sclera tunnel, hooking the left pulling wire in the eye by using a needle with a hook at the front end, hooking the right pulling wire vertically penetrating through the right sclera tunnel by using the needle with the hook or the wire hooking device, lightly dragging the tail end of the left loop piece into the left sclera tunnel, dragging the right loop piece into the right sclera tunnel at the opposite side of 80 degrees by using the right pulling wire, adjusting the neutrality of the artificial crystal, positioning the two loop pieces, the tail end and the whole inside the sclera tunnel, cutting off the tail end pulling wires of the two loop pieces, removing the viscoelastic in the anterior chamber, and closing the transparent cornea or the sclera tunnel incision.

After the scheme is adopted, the invention comprises an artificial lens optical part and two loop parts; the inner ends of the two loops are respectively and tightly connected with the two sides of the optical part of the artificial lens, the tail ends of the loops are provided with two grooves which encircle the whole circumference, and the two grooves are arranged at intervals. Because the invention designs the two loop ends of the original three-body artificial lens (such as AMO AR40 artificial lens used in clinic) into a double-groove shape, the outer groove is positioned at the extreme end of the artificial lens loop, which is convenient for fixing the artificial lens between sclera layers, the thread can be knotted in the outer groove of the loop, the artificial lens loop is guided into the pre-manufactured sclera tunnel by adopting the suture, the artificial lens between sclera layers is fixed with less wound, and the loop is easy to be implanted between sclera layers. In addition, the grooves can increase friction between the artificial lens loop and the sclera. The inner groove is positioned at the middle section (2 mm from the tail end) of the artificial lens loop, so that the knot position is convenient to fix when the artificial lens is suspended, and the possibility of centering the optical surface when the artificial lens is suspended by the traditional method is increased because the knot positions of the two sides are consistent with the tail end of the loop and the artificial lens is not slid to a certain extent.

The invention will be further described with reference to the drawings and the specific examples.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2A is an enlarged partial view of a first embodiment of the end of the haptic of the present invention;

FIG. 2B is an enlarged partial view of a second embodiment of the end of the haptic of the present invention;

FIG. 3 is a schematic illustration of a first implantation step of the present invention;

FIG. 4 is a schematic illustration of a second implantation step of the present invention;

FIG. 5 is a schematic illustration of a third implantation step of the present invention;

FIG. 6 is a schematic illustration of a fourth implantation step of the present invention;

FIG. 7 is a schematic illustration of a fifth implantation step of the present invention;

Fig. 8 is a drawing of an hooking apparatus of the present invention.

Detailed Description

As shown in fig. 1 and 2A, the present invention is a scleral fixed intraocular lens comprising an intraocular lens optic 1, two haptics 2A, 2B; the inner ends of the two loops 2A and 2B are respectively and tightly connected to two sides of the artificial lens optical part 1, the tail ends of the two loops 2A and 2B are respectively provided with two grooves 4A and 4B which encircle the whole circumference, the two grooves 4A and 4B are arranged at intervals, the outer groove 4A is close to the tail end of the loop 2A, so that the last section of the loop 2A is a nail head, and the loop 2A is pulled by a suture to enter the preformed scleral tunnel 7A or the scleral tunnel 7B.

The two loops 2A, 2B are in a shape of "C".

As shown in fig. 2B, the haptics between the two grooves 4A, 4B are toothed 5 to facilitate firm attachment of the haptics 2A' to the scleral tunnel wall after they enter the scleral tunnel 7A.

As shown in fig. 3-7, the present invention is a method for implanting a scleral fixed intraocular lens, comprising the steps of:

(1) Before the intraocular lens is implanted into the eye, two 8-0 or finer nylon wires 9A,9B are bound on grooves 4A at the outer sides of tail ends 3A, 3B of the two loop parts 2A, 2B to be used as traction wires, and then the traction wires are placed into an intraocular lens implanter;

(2) The sclera tunnels 7A and 7B are prefabricated, two mark points 8A and 8B which enter the eye from outside the sclera are marked on conjunctiva at a distance of 180 degrees at a position 2mm behind the sclera rim 6, the mark points 8A and 8B are used as needle passing points and are parallel to the sclera rim 6, the 27G needle is used for manufacturing the sclera tunnels 7A and 7B which pass through the sclera layers, the directions of the two sclera tunnels 7A and 7B are the same as the pointing directions of the subsequently implanted loop, and the length of the sclera tunnels is about 3mm;

(3) Making a 3mm transparent cornea or scleral tunnel incision at a 90 DEG position of the corneoscleral limbus 6, using the step (1) intraocular lens implanter to bundle the traction wire intraocular lens by inserting the two haptics 2A, 2B through the upper incision, the left haptic 2A with the left traction wire 9A first entering the eye, the right haptic 2B with the right traction wire 9B being placed outside the eye, passing through the conjunctiva from an original mark point 8A through the left scleral tunnel 7A into the eye using a 27G needle, hooking the left traction wire 9A in the eye using a 27G or smaller front hooked needle (or a special hooking instrument 10 as shown in FIG. 8), the hooked needle or wire hook is then used to hook the right pull wire 9B, which passes vertically through the right sclera tunnel 7B, from the right sclera tunnel 7B, gently pull the left pull wire 9A to bring the left haptic end 3A into the left sclera tunnel 7A, and likewise pull the right haptic 2B into the 180 ° opposite right sclera tunnel 7B with the right pull wire 9B to adjust intraocular lens centering, the two haptic ends 3A, 2B 3A, 3B are fully seated within the sclera tunnels 7A, 7B, the two haptic 2A, 2B end pull wires 9A, 9B are sheared off, the anterior chamber is purged of viscoelastic, and the superior clear cornea or sclera tunnel incision is closed.

The grooves 4A, 4B and the tooth-like design at the ends of the haptics 2A, 2B of the present invention are different from the complex designs of other patents for firmly fixing the haptics 2A, 2B between sclera layers, which can play a role in preventing the haptics 2A, 2B from sliding between sclera layers (the existing artificial lens-sclera-layer fixing technique has the risk of sliding off into the eye), on the one hand, the preset traction wires 9A, 9B of the outer groove 4A can enable the haptics 2A, 2B to enter the sclera tunnels 7A, 7B without making sclera flaps under the guidance of the traction wires 9A, 9B, even without cutting the conjunctiva, so as to achieve the purpose of minimally invasive. The position of the two inter-scleral tunnels and the traction wires 9A and 9B outside the eyes can be finished under the guidance of the prior marks, and the two loop ends 3A and 3B can be equivalently placed in the inter-scleral tunnels 7A and 7B through the traction wires 9A and 9B, so that the centering stability of the artificial lens is achieved.

The foregoing description is only illustrative of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, i.e., the equivalent changes and modifications to the invention as described in the claims and specification should be considered as falling within the scope of the invention.

Claims

1. A scleral fixed intraocular lens, characterized by: comprises an artificial lens optical part and two loop parts; the inner ends of the two loops are respectively and tightly connected with the two sides of the optical part of the artificial lens, the tail ends of the loops are provided with two grooves which encircle the whole circumference, the two grooves are arranged at intervals, and the grooves on the outer sides are close to the tail ends of the loops;

2. The scleral fixed intraocular lens according to claim 1, wherein: the loop is in a shape of C.