RU2465867C1 - Intraocular lens - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely ophthalmosurgery. A given device comprises an optic part and a support element. A front surface of the optic part comprises a convex hyperbolic surface, while a back surface of the optic part represents a surface of aspheric Schmidt plate reflected with respect to a plane drawn through inflection points of the aspheric Schmidt plate and perpendicular to an IOL symmetry axis. The back surface of the optic part faces concavity arranged in a central zone of the optic part towards a front axis of the optic part, while the symmetry axis of the surface of the optic part matches with that of the back surface. The support element represents a flat ellipse with the diametric segments on a greater axis of the ellipse comprising through X-cuts.

EFFECT: use of the given device enables reducing corneal spherical aberration, creating negative aberration and increasing focussing depth.

2 dwg

Description

The invention relates to the field of ophthalmic surgery.

Known artificial lens of the eye (IHG) according to the patent of Russian Federation No. 2134086, containing the optical part in the form of a positive lens and a supporting part.

However, this IHG has significant drawbacks: the presence of spherical aberration, distorting the quality of the optical image, and insufficient depth of focus.

The technical result of the invention: reducing spherical aberration, creating negative aberration, increasing the depth of focus, creating a multifocal lens of the eye.

The technical result is achieved by the fact that in the artificial lens of the eye containing the optical and supporting part, the front surface of the optical part is made in the form of a convex hyperbolic surface, and the rear surface of the optical part is made in the form of the surface of an aspherical Schmidt plate mirrored relative to the plane drawn through the inflection points the Schmidt aspherical plate and the IHG perpendicular to the axis of symmetry, while the rear surface of the optical part is facing with a concavity located the central zone of the optical portion towards the front surface of the optical part and the axis of symmetry of the front surface of the optical part coincides with the axis of the rear surface of symmetry, wherein the supporting portion is formed as a flat ellipse, wherein at diametrically opposite portions on the major axis formed through cross-slits.

The invention is illustrated by drawings of figures 1-2.

Figure 1 - frontal projection IHG.

Figure 2 is a top view of the IHG.

The proposed IHG is made as follows. IHG contains the reference 1 and the optical part 2. The front surface 3 (Fig.1) of the optical part 2 is made in the form of a convex hyperbolic surface. The rear surface 4 of the optical part 2 is made in the form of an aspherical Schmidt plate facing the curved side to the side opposite to the front surface 3 of the optical part 2.

Schmidt aspherical plate has a round shape. The axis of symmetry 5 of the hyperbolic surface 3 is aligned with the axis of symmetry of the aspherical Schmidt plate.

The supporting part of the IHG is made in the form of a flat ellipse 6. On diametrically opposite sections on the major axis of the ellipse, through cross-shaped slots 7 are made (Figure 2).

The rear surface 4 of the optical part 2 is made in the form of the surface of an aspherical Schmidt plate, mirrored relative to the plane 8 (Figure 1), drawn through the inflection points of the aspherical Schmidt plate, perpendicular to the axis of symmetry 5. In this case, the rear surface 4 of the optical part 2 is facing with a concavity located in the Central zone of the optical part, towards the front surface of the optical part, and the axis of symmetry of the front surface of the optical part coincides with the axis of symmetry of the rear surface.

The proposed IHG works as follows. Light rays, having passed the front surface 3, fall on the rear surface 4 of the optical part 2.

The combination of the front surface 3 in the form of a hyperbolic surface and the rear surface 4 in the form of an aspherical Schmidt plate allows you to compensate for spherical aberration, create negative aberration if necessary, and increase the depth of focus.

Using the proposed design will compensate and reduce spherical aberration, obtain negative aberration, increase the depth of focus, develop a multifocal design and expand the arsenal of applied IHG.

Claims (1)

An artificial lens of the eye (IHG) containing the optical and supporting parts, characterized in that the front surface of the optical part is made in the form of a convex hyperbolic surface, and the rear surface of the optical part is made in the form of the surface of an aspherical Schmidt plate mirrored relative to the plane drawn through the inflection points Schmidt aspherical plate and perpendicular to the axis of symmetry of the IHG, while the rear surface of the optical part is facing with a concavity located in the central zone of optical part, towards the front surface of the optical part, and the axis of symmetry of the front surface of the optical part coincides with the axis of symmetry of the rear surface, while the supporting part is made in the form of a flat ellipse, and through the cross-shaped slots made in diametrically opposite sections on the major axis of the ellipse.

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