RU2281724C1 - Artificial crystalline lens with graduated intraocular change in focal power - Google Patents

Abstract

FIELD: ophthalmology; surgery.

SUBSTANCE: artificial crystalline lens has haptic and optic parts; the lens is made of components. Haptic part is made of two combined parts. First pat is made in form of two support members, tightly connected in one point. Any member is made in form of arc which changes into open spiral. Recess is made onto internal part of arc. Ends of spirals are oriented in opposite to each other. Second part of haptic part has to be a ring which has at least one recess onto its external surface. The recess is made for interaction with internal recess onto internal surface of arc. Internal surface of ring is tightly connected with edge surface of at least one lens.

EFFECT: widened range of technical aids, namely, designs of artificial crystalline lenses.

10 dwg

Description

The invention relates to the field of ophthalmic surgery.

Known posterior artificial lens of the eye by A. with. No. 1377085 dated 12.19.1984, MKI A 61 F 2/16.

The posterior artificial lens of the eye, containing the optical part and diametrically located supporting elements symmetrical about the horizontal axis of the lens. Each of the support elements is made in the form of a curved flat figure, with one of the side end surfaces convex to the side opposite to the center of the optical part, and the other side end surface is concave and concave to the optical part, the ends of the support elements are rounded and turned towards each other, and the supporting elements are deployed in space in opposite directions relative to the vertical axis of the optical part.

However, the above design has significant drawbacks: it does not allow for metered intraocular correction of myopia, hyperopia, anisometropia and induced ametropia after implantation.

The technical problem solved by the invention is dosed intraocular correction of myopia, hyperopia, anisometropia and induced ametropia.

The technical result of the invention is the expansion of the arsenal, technical means, namely, designs of artificial eye lenses.

The technical result is achieved by the fact that the artificial lens of the eye, containing the haptic and optical parts, according to the invention is made integral, while the haptic part consists of two interconnected parts, the first is made in the form of two supporting elements rigidly connected at one point, each of which is made in in the form of an arc turning into an open spiral, moreover, a groove is made on the inner surface of the arc, and the ends of the spirals are directed diametrically opposite to each other, the second part of the haptic part Representing a ring having on the outer surface of at least one groove adapted to cooperate with the inner groove on the inner surface of the arc, wherein the inner surface of the ring is rigidly connected to the end surface, at least one lens.

The proposed invention is illustrated in figures 1-10.

Figure 1 - Top view of the first part of the haptic part.

Figure 2 - Section along aa in figure 1.

Figure 3 - Frontal section of the second part of the haptic part in the form of a ring with one groove and a lens.

Figure 4 - Frontal section of the second part of the haptic part in the form of a ring with two grooves and two lenses.

Figure 5 - The first variant of the interaction of the groove 6 with the groove 8 in the single-lens system.

6 - The second variant of the interaction of the groove 6 with the groove 8 in the single-lens system.

Fig.7 - The first variant of the interaction of the groove 6 with the grooves 9 in a two-lens system.

Fig. 8 is a second example of the interaction of the groove 6 with the grooves 9 in a dual lens system.

Fig.9 - The third variant of the interaction of the grooves 6 with the grooves 9 in a two-lens system.

Figure 10 - View of the IHG from above.

IHG, containing haptic 1 and optical 2 parts, is made compound with the possibility of intraocular dosed changes in refraction. The haptic part 1 consists of two interconnected parts, the first of which is made in the form of two supporting elements. Each element represents an arc 3, turning into an open spiral 4, rigidly connected at one point 5 (figure 1). On the inner surface of the arc 3 is made a groove 6, it is shown in figure 2. This section AA in figure 1. The ends of the spirals 4 are directed diametrically opposite to each other. The second part of the haptic part is a ring 7, containing at least one groove 8 (Fig.3), made on the outer surface of the ring. The inner surface of the ring 7 is rigidly connected to the end surface of at least one lens 2 (figure 3). A groove 8 made on the outer surface of the ring 7 interacts with an inner groove 6 made on the inner surface of the arc 3.

Figure 3 shows a variant that contains a ring 7 with two grooves 9 and two lenses 10, 11.

Other options for the interaction of the groove 6 with the groove 9 in the dual lens system are shown in Fig.7-9. They also allow you to smoothly change the range of the optical power of the IHG.

Figure 10 shows a top view of the IHG.

Dosed intraocular correction of optical power is as follows.

For intraocular correction of myopia, the optical part is removed and replaced with a lens of lower optical power.

For intraocular correction of hyperopia, replace the optical part with a lens with greater optical power.

For intraocular correction of anisometropia, either reduce the refraction of the eye by replacing the optical part with a lens of lower optical power, or increase the refraction of the eye by replacing the insert with a greater optical power.

For intraocular correction of induced anisometropia, either reduce / increase eye refraction through the actions described above, or perform these actions in accordance with changes in refraction in the paired eye, or, when bilateral implantation, perform coordinated actions for intraocular correction in both eyes.

Implantation of IHG is as follows. After phacoemulsification, the anterior chamber and capsule bag are filled with viscoelastic. The haptic part of the IHG is introduced into the anterior chamber through a tunnel incision using an injector or when folded. Then, also using the injector or in the folded state, the optical part of the IHG is introduced into the front chamber. Assembly of IHG is performed intraocularly. The anterior chamber is washed with a BSS solution, Acetylcholine 0.01% solution is introduced. Sealed operational access.

The proposed IHG works as follows. The attachment unit of the optical part in the haptic part allows, if necessary, to remove the implanted optical part in order to replace the lens with a different optical power.

The optical power of the replaced optical part is calculated according to the mathematical dependence on the basis of the magnitude of the required dosed intraocular correction.

Work with IHG is as follows. In the postoperative period, if necessary, a metered intraocular change in the optical power of IHG is performed through a performed corneal paracentesis, 1% Mesaton solution is injected into the anterior chamber to achieve maximum mydriasis. The anterior chamber is filled with viscoelastic. Intraocularly, the microsurgeon using special tools (not shown in the drawing) exerts efforts on the supporting element 2, spreads open ends, removes the optical part and removes it from the anterior chamber through the surgical incision. Through the same surgical approach using an injector or in the folded state, in the case of flexible material, the surgeon inserts the optical part with a new diopter into the anterior chamber, holding the open ends of element 2.

The anterior chamber is washed with a BSS solution, Acetylcholine 0.01% solution is introduced. Sealed operational access.

The need for a metered intraocular change in the optical power of ICH arises in situations where it is difficult to predict the final parameters of the eye, a high probability of induced ametropia, or a planned change in clinical refraction in the postoperative period is necessary. This need arises with a dynamic change in the optical parameters of the eye (for example, intraocular correction in childhood, since the natural growth of the eye lasts on average up to 10 years of age or more), with intraocular correction against the background of a forced change in the refractive power of optical media, for example, due to the introduction of indefinitely vitreous fluids into the vitreous cavity in the case of cataract extraction and implantation of IHG in case of high myopia, when the true definition for our eyes are difficult due to the possible presence of staphylus sclera, in the case of an eye condition after refractive surgery, when it is difficult to obtain a standardized value of corneal refraction, in the presence of temporary ametropic refraction to eliminate anisometropia, as, for example, in the case of intraocular correction in one eye with the initial bilateral ametropia of one degree until the moment of the need for intraocular correction in the paired eye.

ICH with a dosed intraocular change in optical power should be implanted through the incision used for phacoemulsification, fixed in a capsule bag, take a stable position, a change in optical power should be accompanied by minimal trauma, a change in optical power should be predictable and dosed, a change in optical power should not be accompanied by risk the development of complications encountered with intraocular correction (pupil block, IOL displacement, etc.).

Claims (1)

An artificial lens of the eye containing the haptic and optical parts, characterized in that it is made integral, while the haptic part consists of two interconnected parts, the first is made in the form of two supporting elements rigidly connected at one point, each of which is made in the form of an arc, turning into an open spiral, moreover, a groove is made on the inner surface of the arc, and the ends of the spirals are directed diametrically opposite to each other, the second part of the haptic part is a ring containing the outer surface of at least one groove configured to interact with the inner groove on the inner surface of the arc, and the inner surface of the ring is rigidly connected to the end surface of at least one lens.

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