RU2281728C1 - Artificial crystalline lens with graduated intraocular change in focal power - Google Patents

Abstract

FIELD: ophthalmology; surgery.

SUBSTANCE: artificial crystalline lens with graduated intraocular change in focal power has haptic and optic parts. Crystalline lens is made of parts for intraocular graduated change in focal power corresponding to changes in refractivity. Haptic part of crystalline lens is made of two halves. First half is provided with at least one dug-out unit. Second part of haptic part is provided with congruent protrusion which interacts with the dug-out unit. Connected haptic halves connect optic and haptic parts. Haptic part is provided with at least two arc-shaped support members.

EFFECT: graduated intraocular correction of myopia, hypermetropia, anisometropia and induced ametropia.

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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 contains the optical part and diametrically located support 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 specified technical problem is solved in that in an artificial lens of the eye with a metered intraocular change in optical power, comprising a compound haptic and optical part, made compound with the possibility of an intraocular metered change in optical power in accordance with changes in refraction by the fact that it contains a haptic part made of two halves, the first half is provided with at least one notch, and the second half of the haptic part is equipped with a congruent protrusion, interact connecting with this ridge, while the connected haptic halves connect the optical and haptic parts, the haptic part is provided with at least two arcuate support elements.

The invention is illustrated by the drawings shown in figures 1-3.

Figure 1. - Top view of the IHG.

Figure 2. - Enlarged fragment A of figure 1.

Figure 3. - Fragment of the mounting of the optical part.

The artificial lens of the eye according to the invention is as follows. It contains haptic 1, 2 and optical part 3. It is made compound with the possibility of intraocular dosed changes in optical power in accordance with changes in refraction. The haptic part is made of two halves 1, 2 (Fig. 1). Arched support elements 4 are attached to the haptic part. The first half 1 is provided with at least one notch 5, and the second half of the haptic part is equipped with a congruent protrusion 6 interacting with this notch 5 (Figs. 1, 2). In this case, the connected haptic halves 1, 2 connect the optical 3 and the haptic part 1, 2 (Fig. 3).

Intraocular correction of optical power is carried out by extracting the installed optical part 3 and installing a new one with the necessary optical power.

Dosed intraocular correction of optical power is as follows. For intraocular correction of myopia, the optical part 3 is removed and replaced with a lens of lower optical power.

For intraocular correction of hyperopia, replace the optical part 3 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 3 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. Through the tunnel section using the injector or in the folded state, the haptic part 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 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. Intraocularly connect the two halves 1, 2 in the haptic part using elements 5, 6 (Fig. 1, 2). At the time of connection, these elements 1, 2 are in contact with the optical part 3 and clamp it. If it is necessary to change the optical part 3, the elements 5, 6 are also disconnected intraocularly.

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. With a special tool, the arc 1 of the haptic part, in which the optical part is mounted, is diverted from the center. The optical part is removed and removed from the anterior chamber through an operative incision. Through the same operational access using the injector or in the folded state in the case of flexible material, the optical part of the necessary optical power is introduced into the front chamber and then placed in the haptic part with fixation by elements 5.6 taking into account the individual diameter of the optical part. 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 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 a 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, containing the haptic and optical parts, characterized in that it is made with the possibility of intraocular metered change in optical power in accordance with changes in refraction by the fact that it contains a haptic part made of two halves, the first half is provided with at least one tear, and the second half of the haptic part is equipped with a congruent protrusion interacting with this tear, while connected e haptics half combined optical and haptic portion, the haptic portion being provided with at least two arc-shaped support elements.

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