JPS63267350A - Intraocular lens - Google Patents

Abstract

PURPOSE:To obtain an intraocular lens easy to bend and hardly injuring eye tissue, in the intraocular lens having an optical part constituted of a flowable liquid part and the outer shell part sealing said liquid part and a plurality of support parts holding said optical part, by providing a liquid sump part to a part of the outer shell part. CONSTITUTION:An intraocular lens consists of an optical part 1a and two support parts 2a, and a liquid part 3a is provided in the optical part 1a and, further, the liquid sump part 4a communicating with the liquid part 3a is provided; this liquid sump part 4a is positioned in the support part 2a. In the optical part 1a, the liquid part 3a composed of a liquid or gelled substance is sealed in the outer shell part 5a formed of an elastic substance. In the intraocular lens thus constituted, when the optical part 1a is pressed, said optical part 1a deforms by the movement of a part of the liquid part 3a to the liquid sump part 4a and the outer diameter thereof can be contracted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an intraocular lens that is inserted after the crystalline lens is removed during cataract surgery or the like and is used to correct the refraction of the eye.

[Prior Art] In recent years, after cataract surgery, an intraocular lens is often inserted in place of the legitimate crystalline lens. The surgery consists of crushing the lens tissue using ultrasound, suctioning it, and inserting an intraocular lens. It is safer to keep the incision and suture of the ocular tissues as small as possible when removing the crystalline lens and inserting the intraocular lens, and the results after surgery are also better.

In addition, the intraocular lenses to be inserted are made of foldable and flexible materials instead of conventional plastic lenses.
For example, one made of silicone rubber or the like has been proposed.

However, in conventionally proposed intraocular lenses, when the optical band section is compressed and bent, stress is applied to the entire lens section, which may cause internal distortion and deteriorate optical characteristics. Furthermore, since the inside of the intraocular lens is made of a uniform material, the pressure required to compress the intraocular lens is large, and it is necessary to apply strong force to the tweezers when folding the intraocular lens. Another problem is that the large recoil that occurs when removing the tweezers after inserting the intraocular lens may damage the ocular tissue, which is sensitive to external pressure and vibrations.

[Object of the invention] An object of the present invention is to solve the above-mentioned problems by
The 7' part is composed of a liquid part made of a liquid or gel-like substance that can flow in response to external pressure, and a thin outer shell part made of an elastic material that encloses this liquid part, so that it is easy to bend and does not easily damage the eye tissue. The objective is to provide an internal lens.

[Summary of the Invention] The gist of the present invention for achieving the above-mentioned object is to provide an optical part comprising a flowable liquid part and an outer R part enclosing the liquid part, and a plurality of supports holding the optical part. An intraocular lens having a liquid reservoir part provided in a part of the outer shell part.

The gist of the present invention related to the above-mentioned specific invention is an intraocular lens having an optical part composed of a flowable liquid part and an outer shell part enclosing the liquid part, and a plurality of support parts holding the optical part. The intraocular lens is characterized in that a part of the outer shell portion is expanded into a substantially semi-cylindrical shape along a radial direction.

[Embodiments of the invention] The present invention will be explained in detail based on illustrated embodiments.

FIG. 1(a) is a front view of the intraocular lens according to the first embodiment, and FIG. 1(b) is a sectional view taken along line A-A.

The intraocular lens consists of an optical part 1a and two support parts 2a, and a liquid part 3a is provided inside the optical part f'1B1a,
Further, a liquid reservoir 4a communicating with the liquid portion 3a is provided, and the liquid reservoir 4a is located within the support portion 2a. Optical section 1a
In this case, a liquid part 3a made of a liquid or gel-like substance is sealed inside an outer shell part 5a made of an elastic substance.

In the intraocular lens configured in this way, the optical part 1a
When pressed, a part of the liquid part 3a moves to the liquid reservoir part 4a and deforms, making it possible to reduce the outer diameter.

FIG. 2(a) is a front view of the intraocular lens according to the second embodiment, and FIG. 2(b) is a sectional view taken along line B-H, showing the optical part ib
, has a support part 2b consisting of two closed loops, the optical part 1b has a liquid part 3b, and two protruding liquid reservoirs 8'l! 4b
have. The inside of the outer shell part 5b which includes the liquid reservoir part 4b and is made of an elastic material.

A liquid part 3b made of a liquid or gel-like substance is enclosed, and when the optical part tb is pressed, the liquid part 3b inside the optical part 1b moves to the liquid reservoir part 4b, deforming it and reducing the outer diameter. Can be done.

FIG. 3(a) is a front view of the intraocular lens according to the third embodiment, FIG. 3(b) is a cross-sectional view taken along the straight line CC, and (C) is the straight ID-
D is a side view showing an optical part 1c and two supporting parts 2C.
The optical part 1c includes an outer shell part 5 made of an elastic material.
C and a liquid part 3C made of a liquid or gel-like substance sealed inside the liquid part 3C, and the two support parts 2C are optical fibers.
They are provided outward from Blc in mutually opposite directions. Further, as shown in FIG. 3(b), an outer shell portion 5C at the rear rear surface of the center of the optical portion 1c is formed thickly as an outer shell liquid reservoir portion 4C, and has a structure that is easy to fold. Further, as shown in FIG. 3(C), a thin folded portion 6C is formed on the support portion 2C to facilitate folding of the support portion 2C.

FIG. 4(a) is a front view of the intraocular lens according to the fourth embodiment, FIG. 4(b) is a sectional view taken along the line E-E, and FIG. 4(C) is the straight line F-
It is a sectional view taken along F, and shows an optical part 1d and two supporting parts 2d.
The optical part 1d includes an outer shell part 5d made of an elastic material and a liquid part 3 made of a liquid or gel-like material inside the outer shell part 5d.
It has d. The two support parts 2d are formed in a loop shape that is closed outward from the optical part 1d. And liquid 1
3d is arranged in a disk shape inside the optical section 1d, and when viewed from the front, as shown in FIG. 4(a), it is long in the direction of straight line EE and short in the direction of straight line FF. In addition, Fig. 4 (b
), in this cross section, the optical part 1d
The outer shell portion 5d is formed in the shape of a convex meniscus lens with a thick center wall.

Furthermore, as shown in FIG. 4(C), in the straight line F-F cross section, the outer shell portion 5d of the optical section 1d is formed in the shape of a concave meniscus lens with a thin center wall, and the optical section 1d is straightly 1F-F. By pressing in the direction, the cross section in the direction of the straight line FF can be easily deformed into a round shape.

In addition, in this fourth embodiment, the liquid part 3d in the cross section in the straight line FF direction is made thick, but if the liquid part 3d in the cross section in the straight line E-E direction is made thin, it is not necessary to It is not necessary to make the liquid part 3d thick in the cross section in the straight line F-F direction.Furthermore, in the above-mentioned embodiment, the liquid part 3d having a biconvex shape has a plano-convex shape or a convex meniscus shape. Needless to say, it can be changed into a type.

[Effects of the Invention] As explained above, the intraocular lens according to the present invention has an optical part composed of an outer shell part made of an elastic material and a liquid part made of a liquid or gel-like fluid material. This has the advantage of making it easier to fold and further reducing the distortion that occurs when folding.

[Brief explanation of the drawing]

The drawings show an embodiment of the intraocular lens according to the present invention, and FIG. 1(a) is a front view of the first embodiment, FIG. 2(b) is a sectional view taken along the line A-A, and FIG. a) is a front view of the second embodiment, (b) is a sectional view taken along the straight line VjB-B, FIG. 3 (a) is a front view of the third example, and (b) is a cross-sectional view taken along the straight line CC 4(c) is a side view taken along a straight line, FIG. 4(a) is a front view of the fourth embodiment, and FIG. 4(b) is a straight line view.
E is a cross-sectional view, and (c) is a cross-sectional view taken along □ straight iF-F. Reference numeral 1 denotes an optical part, 2 a support part, 3 a liquid part, 4 a liquid reservoir part, 5 an outer shell part, and 6 a folded part. Patent Applicant: Canon Co., Ltd. Figure 1 (Q) (b) Figure 2 (Q) (b) (C1) (G) NiE Figure 3 (b) (C) Iris Figure 4 (b) (C)

Claims (6)

[Claims] 1. In an intraocular lens having an optical part composed of a flowable liquid part and an outer shell part enclosing the liquid part, and a plurality of support parts holding the optical part, a liquid reservoir is formed in a part of the outer shell part. An intraocular lens characterized by having a section. 2. The intraocular lens according to claim 1, wherein the optical part and the plate-shaped support part are integrally formed, and the liquid reservoir is included in the support part. 3. In an intraocular lens having an optical part composed of a flowable liquid part and an outer shell part enclosing the liquid part, and a plurality of support parts holding the optical part, a part of the outer shell part is An intraocular lens characterized by being inflated in a substantially semi-cylindrical shape along a line direction. 4. The supporting part is formed in two plate shapes or two closed loop shapes extending outward from the optical part in mutually opposite directions, and the thickness is reduced along a straight line connecting these supporting parts. The intraocular lens according to scope 1 or 3. 5. The intraocular lens according to claim 1 or 3, wherein a part of the outer shell portion is formed in the shape of a concave menicus lens with a thin wall along one radial direction. 6. The intraocular lens according to claim 5, wherein a part of the outer shell portion is formed into a thick convex meniscus lens shape along a radial direction perpendicular to the first radial line.