CN214967142U

CN214967142U - Intraocular lens for correcting visual axis eccentricity

Info

Publication number: CN214967142U
Application number: CN202120123604.0U
Authority: CN
Inventors: 管怀进; 季敏; 吴坚
Original assignee: Affiliated Hospital of Nantong University
Current assignee: Affiliated Hospital of Nantong University
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-12-03
Anticipated expiration: 2031-01-18

Abstract

The utility model relates to a visual axis intraocular lens in the field of prosthesis products for ophthalmic surgery, which comprises an optical part and two arc connection climbers symmetrically connected with the circumferential edge of the optical part, wherein the main body of the optical part is circular and is provided with a front spherical surface and a rear spherical surface, and the central connecting line of the front spherical surface and the rear spherical surface of the intraocular lens is eccentrically arranged with the circular center of the main body of the optical part. The utility model discloses a visual axis intraocular lens, when the eccentric contained angle that exists to cataract surgery patient's visual axis and optical axis, set up the eccentric formula intraocular lens that is used for eliminating this eccentric contained angle on the intraocular lens of implantation to offset patient's visual axis and the off-centre of optical axis, avoid the problem that the thing exists the glare after the operation.

Description

Intraocular lens for correcting visual axis eccentricity

Technical Field

The utility model relates to the field of ophthalmic medical appliances, in particular to an intraocular lens for correcting the eccentricity of a visual axis.

Background

Intraocular lenses are used in ophthalmic surgery for lens disorders such as cataracts, where a clouded lens is aspirated and then implanted. The one-piece intraocular lens in the prior art comprises an optical part and a connecting flap integrally connected with the optical part, wherein the optical part is the main optical part of the intraocular lens and is a convex lens structure with thick center and thin edges. After the main climbing stick is directly implanted into the lens capsule bag during operation, the main climbing stick end is attached and fixed with the lens zonules, and the optical part is positioned in the lens capsule bag to replace the original lens. The central axis of the convex lens of the one-piece intraocular lens generally coaxially overlaps the central axis of the optical portion body. Generally, a visual axis and an optical axis of a person have a certain included angle, which is called as angle a, the angle a tends to increase with the age, and for a person with the angle a larger than 0.5, when an artificial lens with a central shaft is implanted, especially a multifocal artificial lens, glare can occur during postoperative viewing, so that the postoperative problem of discomfort of a patient is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses when there is big contained angle deviation because of looking axle and optical axis to cataract patient among the prior art, appear the problem of looking the thing glare after implanting artificial lens, provide one kind and correct the eccentric artificial lens of looking axle to rectify the eccentricity of patient's looking axle and optical axis.

The utility model aims at realizing like this, a correct eccentric intraocular lens of visual axis, including optical part and symmetrical connection two arc connection climbers at optical part circumference edge, the main part of optical part is circularly to sphere and back sphere before being equipped with, the line of center of preceding sphere and back sphere sets up with the circular center eccentric of the main part of optical part in order to correct the eccentricity between visual axis and the optical axis.

The utility model discloses an in order to correct the eccentricity between visual axis and the optical axis, when the eccentric contained angle that exists to cataract surgery patient's visual axis and optical axis, set up the eccentric formula intraocular lens who is used for eliminating this eccentric contained angle on the intraocular lens of implantation to offset patient's visual axis and the eccentricity of optical axis, avoid the problem that the object exists the glare after the operation.

In order to adapt to different eccentric amount requirements, the eccentric distance between the connecting line of the centers of the front spherical surface and the rear spherical surface of the optical part and the circular center of the optical part main body is 0.5mm,1mm,1.5mm,2mm,2.5mm,3mm,3.5mm,4mm,4.5mm and 5 mm.

Further, the arc-shaped connecting climbs are connected and extend along the tangential direction of the peripheral edge of the optical body, and the width of the root part of the connecting part of the arc-shaped connecting climbs and the optical body is widened.

Drawings

Fig. 1 is a schematic diagram showing decentration of the visual axis and the optical axis (also the center of the crystalline lens and the center of the cornea) of a cataract surgery patient.

Fig. 2 is a front view of an intraocular lens for correcting decentration of the visual axis according to the present invention.

Figure 3 is a side view of the intraocular lens of figure 1 correcting for visual axis decentration.

Detailed Description

As shown in figures 2 and 3, the intraocular lens for correcting the eccentricity of the visual axis of the present invention comprises an optical portion 1 and two arc-shaped connecting flaps 2 symmetrically connected to the circumferential edge of the optical portion, the main body of the optical portion 1 is circular and is provided with a front spherical surface 101 and a rear spherical surface 102, the connecting line between the centers of the front spherical surface 101 and the rear spherical surface 102 and the circular center of the main body of the optical portion are eccentrically disposed to adapt to the eccentric included angle between the visual axis and the optical axis of different patients during surgery, in the specific embodiment, in combination with the specific situation of the eccentric included angle of the patients during clinical surgery, in the intraocular lens structure, the eccentric distance D between the connecting line between the front spherical surface and the rear spherical surface center of the optical portion (i.e. the optical center of the crystalline lens) and the circular central axis (geometric center) of the main body of the optical portion can be designed to be 0.5mm,1mm,1.5mm,2mm,2.5mm,3mm,3.5mm,4mm,4.5mm,5mm and other different specifications, selecting an artificial lens with a proper eccentric specification according to the actual eccentric included angle of a patient during operation.

The utility model discloses a correct eccentric intraocular lens of visual axis, through the different eccentric distance setting at above-mentioned geometric center and optical center, when the eccentric contained angle that exists to cataract surgery patient's visual axis and optical axis, through the eccentric position of adjusting the crystalline lens in order to offset patient's the eccentric of visual axis and optical axis, avoid the problem that the object exists the glare after the operation. Generally, for the decentration of the patient, the visual axis and the optical axis have a distance deviation in the corneal plane or the lens plane, and the distance deviation between the lens plane and the corneal plane can be determined by biological measurement before operation, as shown in fig. 1. For example, before an operation, a patient looks straight at the brightest direction of light to see a strong light reflection point, the center of the strong light reflection point is eccentric to the center of the eyeball (namely, the center of the cornea), the eccentric distance is the distance deviation between a lens plane and the cornea plane, the position of the brightest light reflection point is also the position of a visual axis, during the operation, according to the eccentric distance of the lens plane, an intraocular lens with the equivalent eccentric distance D is selected, after the intraocular lens is implanted into a lens capsular bag, the optical center of the intraocular lens is coincided with the center of the lens plane measured before the operation or the eccentric distance is the minimum by rotating the angle of the optical center of the intraocular lens, the concentric correction of the intraocular lens and the center of the lens plane of the patient is realized, and the problem of postoperative visual object glare is avoided.

Claims

1. An intraocular lens for correcting the eccentricity of the visual axis comprises an optical part and two arc-shaped connecting climbers symmetrically connected with the circumferential edge of the optical part, wherein the main body of the optical part is circular and is provided with a front spherical surface and a rear spherical surface.

2. A vision correcting, visual axis decentration intraocular lens as claimed in claim 1 wherein the eccentricity of the line joining the centres of the anterior and posterior spheres of the optic to the centre of the circle of the optic body is 0.5mm,1mm,1.5mm,2mm,2.5mm,3mm,3.5mm,4mm,4.5mm,5 mm.

3. The intraocular lens for correcting axial decentration according to claim 1, wherein the arc-shaped connecting climbs are connected and extend in a direction tangential to the circumferential edge of the optical portion main body, and the width of the root portion where the arc-shaped connecting climbs are connected to the optical portion main body is widened.