RU2281062C1 - Artificial crystalline lens with weighed intraocular change in focal power - Google Patents

Abstract

FIELD: ophthalmologic surgery.

SUBSTANCE: artificial crystalline lens can be used for additional correction of ametropia due to introduction of changes in focal power of artificial crystalline lens. Artificial crystalline lens has optical and haptic parts. Haptic part is made in form of disc provided with hole in its center. Disc is provided with at least two through grooves. Optical part is placed in center of haptic part. Main optical plane of optical part is disposed higher than plane where the haptic part is disposed. Optical part communicates with haptic one by means of at least two arc-shaped support members, simultaneously bent at plane being perpendicular to main plane of optic part for interaction with through grooves.

EFFECT: widened set of technical aids.

2 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 well-known IHG containing the haptic and optical part (SU 1697788 F1, 12/15/1991).

However, in this IHG there is no dosed intraocular change in optical power with a change in refraction.

An object of the invention is the creation of IHG with the possibility of intraocular changes in optical power in accordance with a change in refraction.

The specified technical task according to the invention is achieved in that the ICH containing the haptic and optical part is made integral, while the haptic part is made in the form of a disk with a hole in the center, the disk is equipped with at least two end-to-end recesses, and the optical part is located in the center the haptic part, while its main optical plane is located above the plane in which the haptic part is installed, the optical part is connected to the haptic through at least two arcuate support elements, simultaneously slightly curved in a plane perpendicular to the main plane of the optical part, with the possibility of interaction with through recesses.

The invention is illustrated by the drawings shown in figures 1 and 2.

Figure 1 is a top view of the IHG; figure 2 is a fragment of the mounting of the optical part to the haptic.

Figure 1 shows the IHG with a metered intraocular change in optical power, containing the haptic part 1 and the optical part 2.

The haptic part 1 is made in the form of a disk, in the center of which a through circular hole is made. The haptic part 1 is provided with at least two through holes 3 (Fig. 1), the optical part 2 being located in the center of the haptic part 2. The main optical plane of the optical part 2 is located above the plane in which the haptic part 1. The optical part 2 is connected with the haptic part 1 using at least two arcuate support elements 4, simultaneously curved in a plane parallel to the main plane of the optical part 1 and curved in a plane perpendicular to the main plane of the optical part 1 (figure 2) interacting with the through cut away 3 (Figure 2).

Intraocular correction of optical power is carried out by turning it about the axis of vertical symmetry, removing the ends of the supporting elements 4 from the recesses 3, removing the entire installed optical part 2 and installing a new optical part with the necessary optical power.

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, with 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. The operational access is sealed by hydration.

The proposed IHG works as follows. The haptic part 1 and the optical part 2 are mounted intraocularly. The haptic part 1 is made in the form of a disk with recesses 3. The lens 2 is mounted on the haptic part 1 together with arched support elements 4, while the main optical plane of the optical part 2 is located above the plane in which it is located the plane of the haptic part 1 (figure 2).

If necessary, change the optical part 2, together with the support elements 4 (Fig. 1), the optical part 2 is rotated about the axis, freeing the interaction of the support elements 4 and the recesses 3. The optical part 2 together with the support elements 4 is replaced with another optical part with a different diopter.

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 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. The arcuate support element 4, in which the optical part 2 is mounted, is diverted from the center. The optical part 2 is removed and removed from the anterior chamber through an operative incision. Through the same operational access using an 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 camera and then placed in the haptic part 1 with the elements 4 fixed with recesses 3. The front camera is washed with a BSS solution, introduced Acetylcholine 0.01%. 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 part, characterized in that it is made integral, while the haptic part is made in the form of a disk with a hole in the center, the disk is equipped with at least two through cuts, and the optical part is located in the center of the haptic part while its main optical plane is located above the plane in which the haptic part is installed, the optical part is connected to the haptic through at least two arcuate support elements, simultaneously curved in oskosti perpendicular to the principal plane of the optical portion, for engagement with the through cut away.

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