RU2281730C1 - Artificial crystalline lens with graduated intraocular change in focal power - Google Patents

Abstract

FIELD: ophthalmology; surgery.

SUBSTANCE: artificial crystalline lens has combined haptic and optic parts. Haptic part is made of two parts. First part is made in form of two support members which are both connected in one point. Any member has to be an arc turning to open spiral. Ends of spirals are directed diametrically opposite to each other. Second part has to be a ring; there is recess onto external part of the ring. Internal surface of ring is tightly connected with edge surface of optic part. Recess interacts with internal surfaces of arcs.

EFFECT: reduced traumatism of tissues; excluded decentralization of crystalline lens at changes in its focal power.

3 dwg

Description

The invention relates to medicine, more specifically to ophthalmology, and can be used to correct ametropia by intraocular changes in the optical power of the artificial lens of the eye (IHG).

The closest analogue is the known IHG with a metered intraocular change in optical power in accordance with a change in refraction, containing a haptic part equipped with two arcuate support elements, and an optical part (lens) having a convex surface, made with the possibility of reciprocating movement along the axis of central symmetry of the lens and interacting with the fixing element of the haptic part, in particular with a helical surface (see US 58U0533 A, 09/01/1998).

However, the open part of the screw surface of the haptic part may overgrow over time, and the screw structure of the optical part provides for rotation only in one direction, and therefore, considerable efforts will need to be made, which can lead to subluxation of the capsule bag or decentralization of ICH.

The technical problem is solved by the invention - the reduction of trauma to the tissues of the eye and the exclusion of decentralization of ICH with a metered intraocular change in its optical power.

The specified technical problem is solved in that in an artificial lens of the eye with a metered intraocular change in optical power in accordance with changes in refraction containing the optical part and the composite haptic part, according to the invention, the haptic part consists of two parts, the first of which is made in the form of two supporting elements, rigidly connected at one point, each of which represents an arc turning into an open spiral, while the ends of the spirals are directed diametrically opposite to each other, and the second part is a ring, on the outer surface of which a groove is made while the inner surface of the ring is rigidly connected to the end surface of the optical part, and the groove of the outer surface of the ring interacts with the inner surfaces of the arcs of the supporting elements.

The proposed invention is illustrated in figures 1-3.

Figure 1 is a top view of the first part of the haptic part of the IHG.

Figure 2 is a frontal section of the second part of the haptic part in the form of a ring with a groove and an optical part.

Figure 3 is a top view of the IHG assembly.

An artificial lens of the eye (IHG) with a metered intraocular change in optical power contains haptic 1 (figure 1) and optical part 2 (figure 2). It is made composite with the possibility of an intraocular metered change in optical power in accordance with changes in refraction and contains a two-part haptic part 1, the first of which is made in the form of two supporting elements, each of which represents an arc 3, turning into an open spiral 4 and rigidly connected at one point 5 (figure 1), while the ends of the spirals 4 are directed diametrically opposite to each other. The second part of the haptic part is a ring 6 containing a groove 7 made on the outer surface of the ring 6, the inner surface of the ring 6 is rigidly connected to the end surface of the optical part 2, the groove 7 of the ring 6 interacts with the inner surfaces of the arcs 3 of the first part of the haptic part 1 (Fig. .one).

Dosed intraocular correction of optical power is as follows. For intraocular correction of myopia, the optical part 2 is removed and replaced with a lens of lower optical power.

For intraocular correction of hyperopia, replace optical part 2 with a lens with a higher optical power.

For intraocular correction of anisometropia, either reduce the refraction of the eye by replacing the optical part 2 with a lens of lower optical power, or increase the refraction of the eye by replacing the lens with a higher 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. Through the tunnel incision using the injector or in the folded state, the haptic part 1 of the IHG is introduced into the anterior chamber, the capsular bag. Then, also using the injector or in the folded state, the optical part 2 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 2 in the haptic part 1 allows, if necessary, to remove the implanted optical part 2 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 the IHG through the 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) makes efforts to the arc 3, spreads open ends, removes the optical part 2 and removes it from the anterior chamber through the surgical incision. Through the same operational access using the injector or in the folded state in the case of flexible material, the surgeon inserts the optical part 2 with a new diopter into the front chamber, holding the open ends of the arc 3. Then inserts the optical part with a groove 7 and closes the extended ends of the arc.

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 10 years 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 substituting fluids into the vitreous cavity in the case of cataract extraction and implantation of IHG with 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 anisometry, 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 eye lens with a metered intraocular change in optical power in accordance with changes in refraction, containing the optical part and the composite haptic part, characterized in that the haptic part consists of two parts, the first of which is made in the form of two supporting elements rigidly connected at one point, each of which represents an arc turning into an open spiral, while the ends of the spirals are directed diametrically opposite to each other, and the second part is a ring, on hydrochloric surface of which has a groove, wherein the inner surface of the ring is rigidly connected with the end face of the optical part and the groove outer surface of the ring interacts with the inner surfaces of the support elements of the arcs.

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