JPS6161811B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to medicine, particularly ophthalmology, and in particular deals with intraocular lens implants used to replace the crystalline lens of the eye, for example in the treatment of cataracts.

BACKGROUND OF THE INVENTION It is known that during the surgical treatment of various eye diseases, it is often necessary to remove the lens of the eye and then replace it with an artificial lens or an intraocular lens implant. In general, many such implants require an additional step to suture the support member or haptic to the iris, which is a relatively complex surgical procedure, especially when securing the support member to the lower part of the iris. be. Soviet inventor certificate
When the implant is placed within the iris hole, as disclosed in No. 545352, there is considerable movement during mydriasis. In this Inventor's Certificate, an intraocular lens implant includes a lens and a support foot placed outside the pupil, the lens having at least one loop-shaped ear for suturing the implant to the pupil. .

Other intraocular lens implants disclosed in Soviet Inventor Certificate No. 858819 were developed to facilitate lens implantation and improve fixation reliability. In this implant, the upper loop foot is in the upper half of the lens in the form of two ears placed opposite each other in the horizontal plane of the lens, and the surface of this loop foot has a spring-like action. to give an angle of 5 to 8 degrees to the lens surface. This implant also has a lower support foot.

The disadvantage of this implant is that it requires a large defect (up to 4 mm in length) in the upper part of the iris and the subsequent application of supramid sutures, which substantially prolongs the surgery and presents additional technical difficulties during implantation. That's what it means. Also, when removing sutures,
In particular, it may cause displacement of intraocular lens implants. The possibility of pupil deformity and cleft enlargement due to thinned spherical distortion resulting from prolonged compression of the iris tissue cannot be completely avoided.

OBJECTS OF THE INVENTION The present invention provides a highly reliable fixation of an intraocular lens implant in a patient's eye, simplifies the technique of implantation, and substantially eliminates side effects resulting from implantation of such an intraocular lens. , the purpose of which is to create a support member for an intraocular lens implant.

Structure of the Invention This object is achieved by the present invention having the following structure. Namely, the present invention provides an intraocular lens implant comprising a lens and three support members, one of the support members being formed in the shape of a sector and the other two being placed on the same side of the lens diametrically opposite to the sector. , wherein identical and diametrically opposed members are bent in opposite directions to form a foot shape terminating in a loop facing the periphery of the lens, with the sector-shaped member facing towards the lens. To provide an intraocular lens implant characterized in that it is curved and all of the support members are in the plane of the lens.

Detailed Description of the Structure of the Invention The intraocular lens implant of the present invention having such a structure makes it possible to eliminate the need to create a basal defect and to apply sutures to the iris. , substantially reduces surgical time, minimizes intracameral manipulation, and reduces corneal endothelial damage. At the same time, the number of support points is increased, thereby reducing the pressure on the surrounding tissues and reducing their atrophic changes. At the same time, it also reduces displacement of the lens relative to the optical axis of the eye and movement into the vitreous body.

With reference to FIGS. 1 and 2, it can be seen that the intraocular lens implant according to the invention includes a lens 1 and three support members 2 and 3. FIG. lens 1
may be comprised of a polymer such as polymethyl methacrylate, and the support member may be comprised of a thin wire that is inert to ocular fluids. Materials such as supramid or polypropylene can be used.

The support member is in the form of a sector with its end fixed to the lens 1 by suitable known means. The sectors extend along the circumference of the lens 1 over an arc of approximately 90° and are spaced apart from the circumference. The intermediate portion of the support member 2 is curved at 5 to form a sector by bending the wire.

The support members 3 are constructed in the same shape in the form of bent legs and are placed on the same side, diametrically opposite to said sector-shaped member 2 . These two bent legs 3 are bent in opposite directions and terminate in a loop 4 defining a rounded portion to prevent damage to the patient's eye during implantation. The bent leg portions extending along the periphery are symmetrical with respect to a diametrical plane extending from the center of the lens 1 and the middle of the sector 2.

The outer tips of the bent legs 3 in the area of the loops 4 and the tips of the sectors 2 may lie on the same virtual circle with a center close to the center of the lens 1.

Preferably, the total length of the sector 2 is greater than the distance between the points fixing the bent leg 3 relative to the lens.

The intraocular lens implant according to the present invention is implanted by the following method.

An incision is made through the cornea along the lateral tip of the limbus to create a 3-4 mm wide conjunctival flap. Inject 1% phenylephrine hydrochloride into the anterior chamber to dilate the pupil. Open the anterior lens capsule along the periphery with a capsulotomy device. The nucleus of the crystalline lens is removed using a platinum loop. The crystalline material is washed out with sodium chloride solution using a cannula. The intraocular lens implant is inserted using grasping forceps with retaining projections that press the bent leg 3 against the lens and prevent it from stretching.

The intraocular lens implant is held with the sector-shaped support member 2 facing forward. The working part of the forceps is introduced into the posterior chamber together with the intraocular lens implant, and then, using a spatula, the bent legs 3 are released one after another from the holding projections of the forceps and are extended,
It will independently take the desired position within the posterior chamber.
The working part of the forceps is then withdrawn. Next, 6~
The joint is made with sutures spaced at 7 intervals. For regeneration of the anterior chamber, it is preferable to administer an isotonic solution of sodium chloride. Next, a continuous suture is placed on the conjunctiva to complete the surgery.

Example 1 A 62-year-old female patient K was hospitalized with a diagnosis of OD (right eye) mature cataract (age related) and OS (left eye) primary cataract (age related).

Condition at admission: VOD = 1/∞pr.l.certa VOS = 0.8 (uncorrectable) Intraocular lens + intraocular lens + at the same time as extracapsular extrusion in the right eye
I did a port of 24.0. The surgery was performed without any problems.
The inflammatory reaction after surgery was grade I.

Condition at time of discharge: VOD=0.8c−cyl0.5Dax.84゜=1.

3 months later VOD = 1.0.

Example 2 A 54-year-old female patient G was admitted to the hospital with a diagnosis of OS-complicated internal disorders.

Condition at time of admission: VOD=1.0.

VOS = 0.02 (uncorrectable).

Extracapsular extrusion and simultaneous intraocular lens according to the present invention+
I did a port of 22.0OD. The surgery was performed without any complications. The inflammatory reaction after surgery was grade I.

Condition after discharge: VOS = 0.63cosph + 1.0D = 0.7 (due to clouding of the posterior lens capsule).

On the same day, fundus examination of the posterior capsule was performed under outpatient clinical conditions. VOS=0.8cosph+1.0D=1.0.

Implantation of an intraocular lens is recommended in cases of aphakia with an intact posterior lens capsule and immediately after extracapsular explantation performed by various techniques for cataracts of various etiologies.

A contraindication to the implantation of an intraocular lens is the absence of the posterior lens capsule of the eye or damage to it during surgical intervention.

The use of the intraocular lens implant according to the invention makes it possible to reduce the time of surgical intervention by 25% and thus increase the number of operations during the same time. This intraocular lens implant configuration provides high reliability of fixation.

[Brief explanation of the drawing]

FIG. 1 is a front view of the intraocular lens implant according to the present invention, and FIG. 2 is a side view of the intraocular lens implant according to the present invention shown in FIG. 1...Lens, 2...Sector-shaped support member, 3...Bent leg-shaped support member, 4...
Loop, 5...Upward curved part.

Claims (1)

[Claims] 1 comprises a lens and three support members 2, 3, one of the support members is formed in the shape of a sector 2, the other two
3 is an intraocular lens implant placed on the same side of the lens 1 diametrically opposite to the sector, the members 3 placed on the same diametrically opposite side are bent in the opposite direction and the periphery of the lens is It is formed in the shape of a foot 3 with a loop 4 facing the end,
An intraocular lens implant characterized in that the sector-shaped member is cambered toward the lens and all support members are in the plane of the lens.