RU2281063C1 - 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 has optical and haptic parts corresponding to changes in refraction. Optical part has one or two lenses disposed in sequence at the same common axis of center of symmetry of artificial crystalline lens. Optical part is made for reciprocal motion along the axis. Lenses are made for rotation around center of symmetry of optical part and they have two diametrically disposed grooves which grooves interact with at least two protrusions in haptic part. Haptic part is connected with at least two symmetrical curvilinear open members oriented to opposite directions.

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

5 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 5800533 A, 09/01/1998).

However, the principle of changing the optical power is based on the mechanical screwing and unscrewing of the optical part from the haptic part, therefore, the application of excessive force can lead to trauma to surrounding tissues, in particular the ciliary body, for example, with partial overgrowing of the open screw sections of the optical or haptic part.

The technical problem solved according to the invention is to reduce trauma to the surrounding tissues of the eye with a metered intraocular change in the optical power of ICH in accordance with a change in refraction.

The technical result according to the invention is achieved in that in an ICH with a metered intraocular change in optical power in accordance with changes in refraction containing a haptic part connected to at least two symmetrical curved open elements directed in opposite directions and an optical part made with the possibility of reciprocating motion along the axis of central symmetry of the IHG, while the optical part consists of one or two lenses arranged in series on one common axis of central symmetry of the artificial lens of the eye, made with the possibility of rotation around the axis and having two diametrically located grooves interacting with at least two protrusions in the haptic part.

The invention is illustrated by drawings.

Figure 1 shows (frontal projection - section) the haptic part 1, for example, with protrusions 2, 3 and 4 and the optical part in the form of a single lens 5 with two diametrically spaced grooves 6 and the axis OO 'of central symmetry.

Figure 2 shows the lens 5 (top view) with two diametrically located grooves 6 (not shown), on the front surface of the lens 5 there are two through holes 7 that serve as a stop for rotation of the lens around the axis OO 'of central symmetry using a special tool ( not shown in the drawings, is “know-how”)

Figure 3 shows a fragment of the mounting of the grooves 6 of the lens 5 on the protrusion 3 of the haptic part 1.

Figure 4 shows, according to the invention, the haptic part 1 and two lenses 5 and 8, connected respectively using the grooves 6 and 9 of the lens 5 and 8 with the protrusions 3 and 2 of the haptic part 1.

Figure 5 shows the IHG according to the invention (top view), which contains the haptic part 1, the optical part - the lens 5, while the haptic part 1 is connected to at least two symmetrical curved open elements 10 directed in opposite directions, and on the front surface of the lens 5 made two through holes 7.

Intraocular correction of optical power is carried out by moving the intraocular lens 5 along the optical axis OO '(figure 1). If necessary, a system of two lenses 5, 8 and their intraocular movement along the axis OO 'is used (Fig. 4).

Dosed intraocular correction of optical power is as follows. For intraocular correction of myopia, either the lens 5 is moved deeper, or when the myopia is corrected, the lens 8 is more removed if it has been implanted, or it is replaced by a lens of lower optical power, or a lens 8 corresponding to positive or negative optical power is implanted (Fig. 1 or figure 4).

For intraocular correction of hyperopia, either lens 5 is moved toward the cornea if there is no lens 8, lens 8 is added with the corresponding positive optical power, or it is replaced with an insert with higher optical power (Fig. 1 or Fig. 4).

For intraocular correction of anisometry, either reduce the refraction of the eye by moving lenses 5 and / or 8 from the cornea, or by replacing the lens with a lower optical power, or implant the lens 8 of the corresponding positive / negative optical power, or increase the refraction of the eye by moving the lens 5 and / or 8 to the cornea, either by replacing the lens with a higher optical power, or implant the lens 8 of the corresponding positive optical power (Fig. 1 or Fig. 4).

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. Moving the optical lenses 5 and / or 8 from / to the cornea reduces / increases the optical power of the IHG. Adding a positive / negative lens 8 increases / decreases the optical power of the ICH. Replacing the lens 5 and / or 8 with a larger / smaller value of the optical power increases / decreases the optical power of the IHG. The magnitude of the displacement and the optical power of the lenses are calculated according to the mathematical dependence on the magnitude of the required dosed intraocular correction.

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. Using a technological tool, using technological holes on the front surface of the lens, it is biased towards the cornea or retina to attenuate or enhance clinical refraction, either using an injector or when folded, the lens is inserted into the front camera and then placed, for example, between the protrusions of the haptic part . The anterior chamber is washed with a BSS solution, Acetylcholine 0.01% is introduced.

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 for an indefinite period of time into the vitreal cavity of liquids replacing the vitreous body.

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 a haptic part connected to at least two symmetric curved open elements directed in opposite directions, and an optical part configured to reciprocate along the axis of central symmetry artificial lens of the eye, characterized in that the optical part consists of one or two lenses located follower about on a common central symmetry axis of the artificial eye lens, rotatable about an axis and having two diametrically located slot interacting with at least two protrusions in the haptic part.

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