RU2281065C1 - Artificial crystalline lens with weighed intraocular change in focal power - Google Patents

Abstract

FIELD: ophthalmologic surgery.

SUBSTANCE: artificial crystalline lens with weighed intraocular change in focal power corresponding to changes in refraction has optical and haptic parts. Crystalline lens is made of parts for intraocular weighed change in focal power corresponding to changes in refraction due to fact that haptic part is made in form of open round arc. One side of arc is made for movement to center of circle. Both sides of arc are provided with arc-shaped pockets turned with their open parts inside arc. Shape of pockets is congruent to shape of external surface of arc for interaction with optical part. External surfaces of round arc are provided with arc-shaped support members directed to opposite sides.

EFFECT: reduced traumatism of weighed intraocular correction of myopia, hypermetropia, anisometropia and induced ametropia.

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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 well-known IHG with a metered intraocular change in optical power, containing haptic and optical parts, in particular, with a helical surface (see US 5800533 A, 09/01/1998).

However, the principle of changing the optical power of the lens is based on screwing and unscrewing the optical part from the haptic part, so the application of excessive force can lead to trauma to surrounding tissues, in particular the ciliary body.

The objective of the invention is the creation of an IHG design with a metered intraocular change in optical power in order to reduce trauma to surrounding tissues when replacing the optical part.

The technical result is achieved in that the ICH with a metered intraocular change in optical power, containing the haptic and optical parts, is made integral with the possibility of an intraocular metered change in optical power in accordance with changes in refraction by the fact that the haptic part is made in the form of an open circular arc, with one side of the arc is made with the possibility of movement towards the center of the circle, and both sides of the arc are provided with arcuate pockets facing open parts in inside the arc, and the shape of the pockets is congruent with the shape of the outer surface of the arc to interact with the optical part, while the outer surfaces of the circular arc are provided with arcuate support elements directed in opposite directions.

Figure 1 is a top view of the haptic part of the IHG from the optical part assembly.

Figure 2 is a section aa of the pockets of figure 1.

Figure 1 shows the IHG with a metered intraocular change in optical power, contains haptic 1 and optical part 2 (figure 1). It is made composite with the possibility of intraocular dosed changes in optical power in accordance with changes in refraction. The haptic part 1 is made in the form of an open circular arc 3.

One side of the arc is made to move towards the center of the circle 0. Both sides of the arc 3 are provided with arcuate pockets 4, 5, facing the open parts 6 inward of the arc 3 (Fig.2). The shape of the pockets 4, 5 (Fig. 1) is congruent with the shape of the outer surface 7 of the arc 3 for interaction with the optical part 2. The outer surfaces of the circular arc 3 are provided with arcuate support elements 8 directed in opposite directions.

Intraocular correction of optical power is carried out by extracting the installed optical part 2 and installing a new one with the necessary optical power.

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 strengthening unit of the optical part 2 in the haptic part 1, formed by pockets 4,5, allows, if necessary, to remove the implanted optical part in order to replace the lens with a different optical power. Due to the properties of the reinforcement unit, any lens with the appropriate optical power is suitable for implantation, in particular, the optical part of any IHG model with removed haptic elements, for example, directly on the operating table.

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.

In the postoperative period, if there is a need for a metered intraocular change in the optical strength of ICH, a 1% Mesaton solution is injected into the anterior chamber through the performed corneal paracentesis to achieve maximum mydriasis. The anterior chamber is filled with viscoelastic. Using a special tool (not shown in the figures), one of the sides of the arc 3 of the haptic part 1, in which the optical part 2 is mounted, is retracted from the center 0. The optical part 2 is removed from the pockets and removed from the front camera through the surgical incision. Through the same operational access using the injector or in the folded state in the case of flexible material, the optical part 2 of the necessary optical power is introduced into the front chamber and then placed in the pockets 4, 5 of the haptic part 1. The front chamber is washed with a BSS solution, Acetylcholine solution 0 is introduced. 01% Seal 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.

IHG with a metered intraocular change in optical power is implanted through the incision used for phacoemulsification, fixed in a capsule bag, it is in a stable position, the change in optical power should be accompanied by minimal trauma, the change in optical power should be predictable and measured, the 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 with a metered intraocular change in optical power, containing the haptic and optical part, 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 the haptic part is made in the form of an open circular arc, with one side of the arc is made with the possibility of movement towards the center of the circle, and both sides of the arc are equipped with arcuate pockets facing open parts in inside the arc, the shape of the pockets congruent arc shaped outer surface for interaction with the optical portion, wherein the outer surface of a circular arc are provided with arched support elements directed in opposite directions.

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