JPH1156881A - Intraocular lens - Google Patents

Intraocular lens

Info

Publication number
JPH1156881A
JPH1156881A JP21617297A JP21617297A JPH1156881A JP H1156881 A JPH1156881 A JP H1156881A JP 21617297 A JP21617297 A JP 21617297A JP 21617297 A JP21617297 A JP 21617297A JP H1156881 A JPH1156881 A JP H1156881A
Authority
JP
Japan
Prior art keywords
lens
insertion tube
intraocular lens
distal end
eye
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21617297A
Other languages
Japanese (ja)
Inventor
Toshiichi Kikuchi
敏一 菊池
Toshiyuki Nakajima
敏之 中島
Kenichi Kobayashi
研一 小林
Takashi Masuda
高 増田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STAAR Japan Inc
Original Assignee
Canon Staar Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Staar Co Inc filed Critical Canon Staar Co Inc
Priority to JP21617297A priority Critical patent/JPH1156881A/en
Publication of JPH1156881A publication Critical patent/JPH1156881A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide an insertion tool for inserting a deformable an intraocular lens from a smaller cut. SOLUTION: The deformable intraocular lens 1 consisting of an optical part 2 consisting of an elastic deformable body with prescribed storing characteristic and a supporting part 3 consisting of the part 2 and a different kind of material is wrap-held deformed to be small by folding within the wrap-holding member 16 of the insertion tool, the lens 1 is moved in the inner space of an inserting cylinder 21 continued to the member 16 to make the tip part of the cylinder 21 of a prescribed length and a fixed thickness smaller than the other part of the cylinder 21 to insert the lens 1 into the eye from a smaller incision.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、白内障で水晶体
を摘出した後に、水晶体の代わりに挿入される変形可能
な眼内挿入用レンズや、視力補正のみを目的として眼内
に挿入される変形可能な視力補正用レンズ等の変形可能
な眼内挿入用レンズを眼内に挿入するための挿入器具に
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deformable intraocular lens which is inserted in place of the lens after the lens is extracted by cataract, and a deformable lens which is inserted into the eye only for the purpose of correcting vision. The present invention relates to an insertion device for inserting a deformable intraocular insertion lens such as a visual acuity correction lens into an eye.

【0002】[0002]

【従来の技術】1949年リドレイ(Ridley)が白内障手術
の際に白濁した水晶体の代わりに人工の水晶体、即ち眼
内挿入用レンズを初めて人眼に移植して以来、白内障の
治療として眼内挿入用レンズを移植することは広く行わ
れてきた。この初めての眼内挿入用レンズはポリメチル
メタクリレート(PMMA)を光学部の材料とした眼内
挿入用レンズで、白内障手術後の眼内挿入用レンズ移植
に伴う合併症については多くの眼科医が関心を示し、そ
れらの問題について取り組み、その多くは解決がなされ
てきたものの、硬質な材料を光学部に用いるという本質
的な問題により、この眼内挿入用レンズを移植するため
の切開創は光学部の直径より幾分か大きめの寸法が必要
となるために、眼球に作製する切開創は大きくなり、手
術後の乱視が増大するといった問題が解決できない状況
にあった。
2. Description of the Related Art In 1949, Ridley implanted an artificial lens, an intraocular lens, into the human eye for the first time instead of a clouded lens during cataract surgery, and has been used as a treatment for cataract since then. Transplanting lenses has been widely practiced. This first intraocular lens is an intraocular lens made of polymethyl methacrylate (PMMA) as the material of the optical part. Many ophthalmologists have discussed the complications associated with implanting an intraocular lens after cataract surgery. Despite his interest and addressing these issues, many of which have been resolved, the inherent problem of using rigid materials for the optics has made the incision for implanting this intraocular lens an optical incision. Since a size slightly larger than the diameter of the part is required, the incision made in the eyeball becomes large, and the problem that postoperative astigmatism increases cannot be solved.

【0003】また、前述の問題の一因には手術方法も挙
げられた。即ち、元来の白内障水晶体摘出術は、水晶体
をそのままの形態で取り除く白内障嚢外摘出術(ECC
E)で行われており、この手術方法では約10mmの切開
創が必要であり、やはり手術後の乱視を増大させるとい
った問題があった。この様な手術後の乱視を招く手術方
法に対して、超音波水晶体乳化吸引装置を用いた超音波
水晶体乳化吸引術(PEA)が近年出現している。これ
は、白濁した水晶体を、筒状の超音波チップを用いて、
超音波で水晶体を破砕して乳化・吸引することにより、
水晶体を摘出する方法で、この方法によれば眼球に作製
する切開創は、筒状の超音波チップを挿入するためだけ
の寸法となり、その切開創は約3mm〜4mmで水晶体摘出
が可能となる。
[0003] Surgical methods have also been cited as one of the causes of the above-mentioned problems. That is, the original cataract lens extraction is a cataract extracapsular removal (ECC) that removes the lens in its original form.
E), this surgical method requires an incision of about 10 mm, and also has the problem of increasing postoperative astigmatism. Ultrasound phacoemulsification (PEA) using an ultrasonic phacoemulsification device has recently emerged as a surgical method that causes astigmatism after such surgery. This uses a cylindrical ultrasonic tip to transform the clouded lens
By crushing the lens with ultrasound and emulsifying and sucking,
With this method of removing the lens, the incision made in the eyeball according to this method has dimensions only for inserting a cylindrical ultrasonic tip, and the incision can be removed in about 3 mm to 4 mm. .

【0004】したがって、白内障の際の白濁した水晶体
を摘出する手術は、手術後の乱視軽減を図る小さな切開
創で手術が可能な状況にはあるが、人眼の水晶体に代わ
る眼内挿入用レンズを移植する眼内挿入用レンズ挿入術
においては、眼内挿入用レンズの光学部が硬質な材料で
構成されるという本質的な問題により、眼内挿入用レン
ズを挿入するには光学部直径より幾分か大きな切開寸
法、標準的な光学部直径6.0mmに対する切開創としては
およそ6.5mm以上の切開創が必要となるため、超音波水
晶体乳化吸引術により小さな切開創から白濁した水晶体
を摘出しても、眼内挿入用レンズを挿入するためには小
さな切開創を広げなければならず、大きな切開創が原因
となる手術後の乱視という問題は解決されない状況にあ
った。
[0004] Therefore, surgery for removing a clouded lens during a cataract can be performed with a small incision to reduce astigmatism after the operation. However, an intraocular lens that replaces the lens of the human eye. In intraocular lens insertion surgery to implant a lens, due to the inherent problem that the optics of the intraocular lens is made of a hard material, it is necessary to insert the Since an incision of approximately 6.5 mm or more is required as an incision for a somewhat larger incision size and a standard optic diameter of 6.0 mm, an opaque lens is removed from a small incision by ultrasonic phacoemulsification. Even if it is excised, a small incision must be widened in order to insert an intraocular lens, and the problem of postoperative astigmatism caused by a large incision has not been solved.

【0005】このような状況に対しては、手術後の乱視
軽減を目的として、切開創を小さくするための眼内挿入
用レンズの改良、即ち短径を切開創の方向に向け挿入す
る楕円型光学部の眼内挿入用レンズや、光学部直径を小
さくした小径光学部の眼内挿入用レンズが出現したが、
光学部が硬質という本質的な問題点は残されたままで、
この場合の切開創はおよそ5.5mm程度とわずか1mm程度
を小さくするにとどまった。
[0005] Under such circumstances, for the purpose of reducing astigmatism after the operation, an ocular insertion lens for reducing an incision wound, that is, an elliptical lens having a short diameter directed toward the incision, is inserted. Although an intraocular lens for the optical part and a small diameter optical part for the intraocular lens with a reduced optical part diameter appeared,
The essential problem that the optical part is rigid remains,
The incision wound in this case was reduced to about 5.5 mm, only about 1 mm.

【0006】しかし、更に改良が重ねられ、前記の本質
的な問題点に対応する新しい眼内挿入用レンズが近年用
いられるようになってきた。これは、特開昭 58-146346
号公報に示されているように、眼球に作製した小さな切
開創から挿入可能な、少なくとも光学部が所定の記憶特
性を有する変形可能な弾性体等を用いた眼内挿入用レン
ズまたは少なくとも光学部が所定の記憶特性を有する弾
性体を用い、光学部を眼内で支える異種部材からなる支
持部を有する変形可能な眼内挿入用レンズの出現と、特
開昭 58-146346号、特開平4-212350号、特開平5-103803
号、特開平5-103808号、特開平5-103809号、特開平 7-2
3990号の各公報に示されているように、変形可能な眼内
挿入用レンズの光学部を圧縮したり、巻いたり、折曲げ
たり、伸ばしたり、折畳んだりして変形させることで、
変形前の大きな形状から小さな形状にした上、眼球に作
製した小さな切開創からの挿入を可能とする挿入器具の
出現である。これらの変形可能な眼内挿入用レンズとそ
の挿入器具により、眼内挿入用レンズ挿入術も小さな切
開創で可能となり、手術後の乱視を軽減する小さな切開
創での白内障手術が水晶体摘出から眼内挿入用レンズ挿
入にわたり可能となった。
[0006] However, with further improvements, new intraocular lenses have been used in recent years to address the essential problems mentioned above. This is disclosed in JP-A-58-146346.
As shown in the publication, an intraocular insertion lens or at least an optical part using a deformable elastic body or the like having at least an optical part having predetermined memory characteristics, which can be inserted from a small incision made in the eyeball The use of an elastic body having a predetermined memory characteristic, the emergence of a deformable intraocular lens having a support portion made of a heterogeneous member that supports the optical portion in the eye, and the disclosure of Japanese Patent Application Laid-Open Nos. 58-146346 and 58-146346. -212350, JP-A-5-103803
No., JP-A-5-103808, JP-A-5-103809, JP-A-7-2
As shown in each publication of No. 3990, by compressing, rolling, bending, stretching, stretching, folding or deforming the optical part of the deformable intraocular lens,
This is the emergence of an insertion instrument that allows a small incision made in the eyeball to be inserted into the eyeball after the shape is reduced from the large shape before deformation. These deformable intraocular lenses and their insertion devices also allow for ocular lens insertion with a small incision and cataract surgery with a small incision to reduce postoperative astigmatism. It is possible to insert the lens for internal insertion.

【0007】即ち、図3に示すように、変形可能な眼内
挿入用レンズ1として、所定の記憶特性を有する変形可
能な弾性体で形成した円形の光学部2の外周部に、光学
部2と異種の可撓性材料で形成した1対の支持部3の基
部3aを埋込み固着し、支持部3の線状の突出部3bを
湾曲させ、2つの支持部3を対称形に配置したものや、
図4に示すように、図3と同様な所定の記憶特性を有す
る材料からなり、円形の光学部2の外周から一体に、光
学部2を支える厚さが薄い板状の前,後2つの支持部4
を相対向させて突出させたものがあった。
That is, as shown in FIG. 3, a deformable intraocular lens 1 is provided on the outer periphery of a circular optical part 2 formed of a deformable elastic body having a predetermined memory characteristic. The base 3a of a pair of support portions 3 formed of a different kind of flexible material is embedded and fixed, the linear protrusion 3b of the support portion 3 is curved, and the two support portions 3 are arranged symmetrically. And
As shown in FIG. 4, the front and rear plates are made of a material having a predetermined memory characteristic similar to that of FIG. Support part 4
Were made to project in opposition to each other.

【0008】そして、図3,図4に示すものなど、光学
部2と支持部3または支持部4とからなり少なくとも光
学部2が所定の記憶特性を有する変形可能な眼内挿入用
レンズ1を大きな形状から小さな形状に2つ折り状にす
るなど折畳んで変形させ、円筒状などに形成した挿入筒
に通して眼球に作製した切開創から眼内挿入用レンズを
眼内に挿入するには、例えば特開平 7-23990号公報に示
された挿入器具などを用いている。
3 and 4, a deformable intraocular lens 1 comprising an optical part 2 and a support part 3 or a support part 4 and having at least the optical part 2 having a predetermined memory characteristic. In order to insert an intraocular insertion lens into the eye from an incision made in the eyeball through an insertion tube formed into a cylindrical shape, such as folding it into two from a large shape to a small shape and deforming it, For example, an insertion instrument disclosed in JP-A-7-23990 is used.

【0009】前記挿入器具を用いて、変形可能な眼内挿
入用レンズを小さな切開創から挿入するには、挿入器具
の包持部材の開閉機構を開いてレンズ設置部に眼内挿入
用レンズを入れ、開閉機構を閉じることで、レンズ設置
部に入れた眼内挿入用レンズを変形前の大きな形状から
小さい形状に変形させ、器具本体に取り付けた係止部材
をレンズ設置部側に移動させて開閉機構を閉状態に係止
することにより、設置部内に眼内挿入用レンズを設置す
る。その後、挿入器具の押出し機構の操作によって、押
出し軸を前進させ、設置部内の眼内挿入用レンズを押出
し、設置部の先端側に連なる挿入筒内を通して、切開創
に挿入した前記挿入筒の先端から眼内に眼内挿入用レン
ズを挿入させている。挿入筒は基端部から先端にかけて
細くしてあり、より小さな創口からの眼内挿入用レンズ
の挿入を可能にしている。
In order to insert a deformable intraocular lens from a small incision by using the insertion device, the opening / closing mechanism of the holding member of the insertion device is opened, and the intraocular lens is inserted into the lens installation portion. By inserting and closing the opening / closing mechanism, the intraocular lens placed in the lens installation section is deformed from a large shape before deformation to a small shape, and the locking member attached to the instrument body is moved to the lens installation section side. By locking the opening / closing mechanism in a closed state, the intraocular lens is installed in the installation section. Then, by operating the pushing mechanism of the insertion device, the pushing shaft is advanced, the lens for intraocular insertion in the setting portion is pushed out, and the tip of the inserting tube inserted into the incision wound through the insertion tube connected to the tip side of the setting portion. The lens for intraocular insertion is inserted into the eye. The insertion tube is tapered from the proximal end to the distal end, allowing insertion of an intraocular lens from a smaller wound.

【0010】[0010]

【発明が解決しようとする課題】しかしながら、前記従
来の技術に示すような、少なくとも光学部が所定の記憶
特性を有する変形可能な弾性体等を用いた変形可能な眼
内挿入用レンズ、または少なくとも光学部が所定の記憶
特性を有する変形可能な弾性体を用い、光学部を眼内で
支える異種部材から成る変形可能な眼内挿入用レンズ
を、変形前の大きな形状から小さな形状に変形させて、
ノズル(円筒)形状にした先端部を介して眼球に作製し
た小さな切開創から変形可能な眼内挿入用レンズを眼内
に挿入する前記の挿入器具には、次のような問題点があ
った。
However, a deformable intraocular insertion lens using a deformable elastic body or the like having at least an optical portion having a predetermined memory characteristic as shown in the above-mentioned prior art, or at least The optical part uses a deformable elastic body having a predetermined memory characteristic, and the deformable intraocular insertion lens made of a heterogeneous member that supports the optical part in the eye is deformed from a large shape before deformation to a small shape. ,
The above-described insertion device that inserts a deformable intraocular insertion lens into the eye from a small incision made in the eyeball through a nozzle (cylindrical) tip has the following problems. .

【0011】前述のように、眼球に作製されたより小さ
い創口から眼内挿入用レンズを挿入できるような形状に
はなっていたものの、所定の大きさのレンズを折り畳ん
で挿入するためには挿入筒の内径には限界があった。ま
た、挿入筒の先端部を形成する素材の厚さと挿入筒の強
度を保つに十分なものが必要であるため、実質的な最小
の切開幅がこれらの条件により決定されていた。さら
に、挿入筒を眼内に挿入しやすくするように先端に向け
て肉厚を薄くすると、確かに挿入性は向上するが、肉厚
が厚くなっていくに連れて創口を開く形になり、創口の
自己閉鎖が達成されなかったり、挿入により創口が拡大
するなどの重篤な不具合を生ずる可能性がある。そし
て、成形加工によって挿入筒を作製する場合、挿入筒の
先端部の厚さが薄いと材料の流れが悪くなり、挿入筒の
先端まで十分に充填されず成形不良を起こすという不都
合もあり、実際には強度的には薄くできるものの加工上
の制限から最小厚が決定され、それに伴って眼内挿入用
レンズを挿入するための切開幅を決定する要素になって
いた。
As described above, although it has been shaped so that an intraocular lens can be inserted from a smaller incision made in the eyeball, an insertion tube is required to fold and insert a lens of a predetermined size. Had a limited inner diameter. Further, since the thickness of the material forming the distal end portion of the insertion tube and a material that is sufficient to maintain the strength of the insertion tube are required, a substantially minimum incision width is determined by these conditions. Furthermore, if the wall thickness is reduced toward the tip to make it easier to insert the insertion tube into the eye, the insertability will certainly improve, but as the wall thickness increases, the wound opens up, Serious problems such as failure to achieve self-closure of the wound or expansion of the wound upon insertion may occur. When the insertion tube is manufactured by molding, if the thickness of the end portion of the insertion tube is thin, the flow of the material becomes poor, and there is also a disadvantage that the tip of the insertion tube is not sufficiently filled to cause a molding defect, and in practice, Although the thickness can be made thinner, the minimum thickness is determined due to processing restrictions, and accordingly, the incision width for inserting the intraocular lens is determined.

【0012】この発明は、前述した問題点を解決して、
より小さい切開創から変形可能な眼内挿入用レンズを眼
内に挿入できる挿入器具を提供することを主要な目的と
している。
The present invention solves the above-mentioned problems,
The main object of the present invention is to provide an insertion device that can insert a deformable intraocular lens into the eye from a smaller incision.

【0013】[0013]

【課題を解決するための手段】請求項1の発明は、所定
の記憶特性を有する変形可能な弾性体で形成した光学
部、および前記光学部と同材料または異種の材料で形成
して前記光学部を眼内で支える支持部とからなる眼内挿
入用レンズを、包持部材内に折り畳むことにより小さな
形状に変形させて包持した後、包持部材の先端側に連続
した挿入筒の内部空間内を移動させ、挿入筒の先端から
眼内に挿入する眼内挿入用レンズの挿入器具において、
前記挿入筒の先端から基端側に所定の長さに形成した挿
入筒先端部分の素材の厚みを一定で他の部分に比較して
薄くすることで、より小さな切開創から前記レンズを眼
内に挿入することが可能になるという効果がある。
According to a first aspect of the present invention, there is provided an optical unit formed of a deformable elastic body having a predetermined memory characteristic, and the optical unit formed of the same or different material as the optical unit. After folding the intraocular insertion lens consisting of the support part supporting the part in the eye and folding it into the holding member to deform it into a small shape and holding it, the inside of the insertion tube continued to the tip side of the holding member In an insertion device for an intraocular lens to be moved in space and inserted into the eye from the tip of the insertion tube,
By making the thickness of the material at the distal end of the insertion tube formed at a predetermined length from the distal end of the insertion tube to the base end side constant and thinner than the other portions, the lens can be inserted into the eye from a smaller incision. There is an effect that it becomes possible to insert into.

【0014】請求項2の発明に係る挿入器具は、前記挿
入筒の先端部分に、1つまたは複数の切り込みを軸方向
に沿って形成することにより、眼内挿入用レンズが挿入
筒から押し出されて所定の形状に戻る際の応力を徐々に
解放するだけでなく、この応力の解放により挿入筒自体
にかかる力を減少することで、強度の不足を補い、先端
部分の素材厚をさらに薄くすることができるという効果
を持つ。
According to a second aspect of the present invention, an intraocular lens is pushed out of the insertion tube by forming one or more cuts in the distal end portion of the insertion tube along the axial direction. In addition to gradually releasing the stress when returning to the predetermined shape, the release of this stress reduces the force applied to the insertion tube itself, thereby compensating for the lack of strength and further reducing the thickness of the material at the tip. It has the effect of being able to.

【0015】請求項3の発明は、挿入筒の先端部分を眼
内に挿入する部分とほぼ一致した長さにしたので、前記
請求項1の効果をより確実に生じさせ得るという効果を
持つ。
According to the third aspect of the present invention, the length of the distal end portion of the insertion tube is substantially equal to the length of the portion to be inserted into the eye, so that the effect of the first aspect can be produced more reliably.

【0016】請求項4の発明は、合成樹脂の射出成形と
いう作製方法で、挿入筒全体の厚さを減少させた場合に
生ずる素材の回り込み不足による成形不良回避しつつ、
より小さい切開創から眼内挿入用レンズを挿入可能にす
るという効果を持たせることができる。
According to a fourth aspect of the present invention, a manufacturing method called injection molding of a synthetic resin is used to avoid molding defects due to insufficient wraparound of a material caused when the thickness of the entire insertion tube is reduced.
The effect of enabling insertion of the intraocular lens from a smaller incision can be provided.

【0017】[0017]

【発明の実施の形態】図1はこの発明に係る変形可能な
眼内挿入用レンズの挿入器具の第1実施形態の縦断面図
であり、後述する挿入筒21以外は出願人により特開平
7-23991号公報によって開示されたものと同様なもので
ある。図中12は器具本体であり、この本体12の末端
部12a外周部に雄ネジ12cを形成してあり、雄ねじ
12cを押出し機構部に設けた操作筒14の内周部に形
成された雌ネジ14aをネジ嵌合させてある。
FIG. 1 is a longitudinal sectional view of a first embodiment of a deformable intraocular lens insertion device according to the present invention, and FIG.
This is similar to the one disclosed by JP-A-7-23991. In the figure, reference numeral 12 denotes an instrument main body. A male screw 12c is formed on an outer peripheral portion of a distal end portion 12a of the main body 12, and a female screw is formed on an inner peripheral portion of an operation cylinder 14 provided with the male screw 12c in an extruding mechanism. 14a is screw-fitted.

【0018】押出し機構部には操作筒14とほぼ同軸に
設けた押出し軸15の末端部を互いに回転可能な形態で
挿入してあり、押出し軸15は不図示の回転抑制機構に
より操作筒14に対して回動しない状態で長手方向に移
動可能である。押出し軸15先端部15aは眼内挿入用
レンズを押し出すのに適した形状に形成してある。本体
12の先端部12bには包持部材16の基底部17が同
軸に固定されている。包持部材16の中央部には開閉機
構を有するレンズ設置部19が形成されており先端に向
かって挿入部20、挿入筒21が同軸に順次形成してあ
る。
An end of an extrusion shaft 15 provided substantially coaxially with the operation cylinder 14 is inserted into the extrusion mechanism so as to be rotatable relative to each other. The extrusion shaft 15 is connected to the operation cylinder 14 by a rotation suppressing mechanism (not shown). It can move in the longitudinal direction without rotating. The tip 15a of the pushing shaft 15 is formed in a shape suitable for pushing out an intraocular lens. A base portion 17 of a holding member 16 is coaxially fixed to a distal end portion 12b of the main body 12. A lens installation section 19 having an opening / closing mechanism is formed at the center of the holding member 16, and an insertion section 20 and an insertion tube 21 are formed coaxially toward the tip in this order.

【0019】図2は包持部材16のレンズ設置部19で
の横断面図である。レンズ設置部19は固定半割筒22
と、これに対向する可動半割筒23とから構成し、これ
らがヒンジ部24により開閉可能に連結してある。固定
半割筒22、可動半割筒23の上縁にはそれぞれ押さえ
板25,26を設けてある。ヒンジ部24を介して開閉
機構を閉じると、可動半割筒23と固定半割筒22によ
り基底部17、および先端部20と同心の筒状になる構
成を持つ。
FIG. 2 is a cross-sectional view of the holding member 16 at the lens installation portion 19. The lens installation part 19 is a fixed half cylinder 22
And a movable half cylinder 23 opposed thereto, which are connected to each other by a hinge 24 so as to be openable and closable. Pressing plates 25 and 26 are provided on the upper edges of the fixed half cylinder 22 and the movable half cylinder 23, respectively. When the opening / closing mechanism is closed via the hinge portion 24, the movable half tube 23 and the fixed half tube 22 form a tube concentric with the base portion 17 and the distal end portion 20.

【0020】図1に戻って説明すると、器具本体12に
は、スライドストッパー27が軸方向に回転せずに移動
可能に嵌合させてあり、溝27aが包持部材16を閉状
態に固定する。器具本体12、操作筒14、押出し軸1
5、包持部材16およびこれと一体に形成した挿入筒2
1は、それぞれ合成樹脂により成形品として形成されて
いる。
Referring back to FIG. 1, a slide stopper 27 is movably fitted to the instrument body 12 without rotating in the axial direction, and a groove 27a fixes the holding member 16 in a closed state. . Instrument body 12, operation cylinder 14, extrusion shaft 1
5. Holding member 16 and insertion tube 2 formed integrally therewith
1 are each formed as a molded article by a synthetic resin.

【0021】この挿入器具を用いて、図3に示した眼内
挿入用レンズ1を眼内に挿入する。眼内挿入用レンズ1
は光学部2、および支持部3から構成し、支持部3は光
学部とは異種の材料で形成し、そのバネ性により眼内に
固定する。図4は図3と同様な眼内挿入用レンズ1の別
の一例である。この眼内挿入用レンズは、光学部2と同
種の材料からなる支持部4を持ち、材料自体の弾性力に
より眼内に保持するものである。
Using this insertion instrument, the intraocular lens 1 shown in FIG. 3 is inserted into the eye. Intraocular lens 1
Is composed of an optical part 2 and a support part 3, and the support part 3 is formed of a material different from that of the optical part, and is fixed in the eye by its spring property. FIG. 4 shows another example of the intraocular lens 1 similar to FIG. The intraocular lens has a support portion 4 made of the same material as the optical portion 2 and is held in the eye by the elastic force of the material itself.

【0022】前記眼内挿入用レンズの挿入方法は以下の
ようにする。まず、図2に示すように、押え板26、可
動半割筒23が開いた状態で眼内挿入用レンズ1をレン
ズ設置部19に位置決めして設置し、眼内挿入用レンズ
1の光学部2が二つ折りになるように押え板26、可動
半割筒23を閉じた後、スライドストッパー27を前進
させ、この状態を保つ。
The method for inserting the intraocular lens is as follows. First, as shown in FIG. 2, the intraocular insertion lens 1 is positioned and installed on the lens installation section 19 with the holding plate 26 and the movable half cylinder 23 open, and the optical section of the intraocular insertion lens 1 is installed. After closing the holding plate 26 and the movable half-barrel 23 so that 2 is folded in two, the slide stopper 27 is advanced, and this state is maintained.

【0023】次に、眼内挿入用レンズ1を実際に眼内へ
の挿入する操作を行う。その手順は、水晶体を摘出した
眼内に挿入筒21を挿入し、操作筒14を回転して押出
し軸15を前進させることにより、挿入筒21先端部か
ら押出して眼内挿入用レンズ1を眼内に挿入する方法を
用いる。押出し軸15により挿入筒21内部の空間を移
動した眼内挿入用レンズ1は、光学部2の弾性復元力に
より挿入筒21から出た際に二つ折りにする前の形状に
復元する。
Next, an operation for actually inserting the intraocular lens 1 into the eye is performed. The procedure is as follows. The insertion tube 21 is inserted into the eye from which the lens has been removed, and the operation tube 14 is rotated to push the pushing shaft 15 forward. Use the method of inserting into the inside. The intraocular lens 1 having moved through the space inside the insertion tube 21 by the pushing shaft 15 is restored to the shape before being folded in two when it comes out of the insertion tube 21 by the elastic restoring force of the optical unit 2.

【0024】図5は、挿入筒21の縦断面を詳細に示し
た拡大図であり、挿入筒21は、基端21bから先端2
1aにかけてテーパ状に内径が小さくなる形状を持つ。
眼内挿入用レンズの挿入時に眼内に進入する挿入筒21
の先端部分21cでは、内径と外径とが等しいテーパを
持っていて、肉厚が一定の肉薄部を形成している。中間
部分21dにおいては、先端部分21cとは異なる厚み
を持つ。先端部分21cから中間部分21dにかけて
は、外径が内径とは異なる角度のテーパにより次第に厚
みを増している。より具体的には、中間部分21dの先
端側では外径が基端に向かって急なテーパ角度で大きく
なり、中間部分21dの基部側では外径が基端に向かっ
て緩やかなテーパ角度で大きくなるようにしてある。ま
た、中間部分21dの終端から基端21bにかけては、
外径が異なるテーパ角度を持ち、基端部分21eではさ
らに厚い肉厚を持つ構造にしている。
FIG. 5 is an enlarged view showing the vertical section of the insertion tube 21 in detail.
It has a shape in which the inner diameter becomes smaller in a tapered shape toward 1a.
Insertion tube 21 that enters the eye when inserting the intraocular insertion lens
Has a taper having the same inner diameter and outer diameter, and forms a thin portion having a constant thickness. The intermediate portion 21d has a thickness different from that of the tip portion 21c. From the tip portion 21c to the intermediate portion 21d, the outer diameter gradually increases in thickness due to the taper at an angle different from the inner diameter. More specifically, the outer diameter increases at the tip side of the intermediate portion 21d toward the base end at a steep taper angle, and at the base side of the intermediate portion 21d, the outer diameter increases at a gentle taper angle toward the base end. It is made to become. Also, from the terminal end of the intermediate portion 21d to the base end 21b,
The outer diameter has a different taper angle, and the base end portion 21e has a structure having a larger thickness.

【0025】図6は、図5と同様に挿入筒21を詳細に
示した第2実施形態の斜視図である。挿入筒21の構造
は図5と同様であり、先端部分21c、中間部分21
d、基端部分21eでそれぞれ異なる肉厚を持つような
構造を示している。そして、先端部分21cには、先端
から基端側に向かう切り込み部21fを軸方向に沿って
形成し、小さく折り畳んだ眼内挿入用レンズが眼内で広
がる際に、前記切り込み部21fが広がる方向に弾性変
形し、眼内挿入用レンズの応力を徐々に解放する。この
作用により、眼内挿入用レンズが挿入筒21の先端21
aから飛びだして、眼内組織に損傷を与えることを防ぐ
とともに、切り込み部21fの方向に眼内挿入用レンズ
を押し出してこのレンズの射出方向を限定することで、
常に安定した眼内挿入を可能にする。
FIG. 6 is a perspective view of the second embodiment showing the insertion tube 21 in detail similarly to FIG. The structure of the insertion tube 21 is the same as that of FIG.
d, the base portion 21e has a different thickness. In the distal end portion 21c, a notch 21f is formed along the axial direction from the distal end toward the proximal end, and the direction in which the notch 21f expands when the small folded intraocular lens expands in the eye. It is elastically deformed to gradually release the stress of the intraocular lens. By this action, the intraocular lens is inserted into the distal end 21 of the insertion tube 21.
By preventing the lens from jumping out of a and damaging the intraocular tissue, and by pushing out the intraocular insertion lens in the direction of the notch 21f to limit the exit direction of this lens,
Always enables stable intraocular insertion.

【0026】第2実施形態では切り込み部21fが1本
の場合を示したが、挿入筒21が弾性変形することで眼
内挿入用レンズの応力を徐々に解放するという作用は、
1本の切り込みのみならず複数でも近似した作用を得る
ことができる。また、第2実施形態では切り込み部21
fは先端21aから形成されているが、切り込みが広が
ることでレンズの応力を徐々に解放する作用を実現する
ためには特に先端から形成されていることにこだわらな
い。
In the second embodiment, the case where the number of the cut portions 21f is one is shown. However, the effect of gradually releasing the stress of the intraocular lens by the elastic deformation of the insertion tube 21 is as follows.
An approximate action can be obtained not only with one cut but also with a plurality of cuts. In the second embodiment, the notch 21
Although f is formed from the front end 21a, it is not particularly limited to being formed from the front end in order to realize the function of gradually releasing the stress of the lens by widening the cut.

【0027】そして、切り込み部21fを挿入筒21の
先端部分21cの薄肉部に所要の長さに設けることで、
本来内径が一番細くなり、挿入筒21の内壁にかかる力
が強くなる部分に対して、切り込み部21fから眼内挿
入用レンズを射出してその力を逃がし、肉厚が薄くなる
ことによる挿入筒の強度不足を補うことができる。さら
に、前記実施形態のように、先端部分、中間部分、基端
部分を、なだらかな形状で肉厚を変化させることで、挿
入筒21を射出成形した合成樹脂で構成する場合に、合
成樹脂の流れが妨げられなくなり、各部分への合成樹脂
の回り込みがよくなることで、成形性が向上し不良品を
減少させて、生産性を向上させることができる。
By providing the notch 21f in a thin portion of the distal end portion 21c of the insertion tube 21 to a required length,
By inserting the intraocular lens through the cutout portion 21f to release the force to the portion where the inner diameter is originally thinnest and the force applied to the inner wall of the insertion tube 21 is strong, the insertion due to the reduced thickness is achieved. The insufficient strength of the cylinder can be compensated. Further, as in the above-described embodiment, when the insertion tube 21 is formed of injection-molded synthetic resin by changing the thickness of the distal end portion, the intermediate portion, and the base end portion in a gentle shape, the synthetic resin The flow is not hindered, and the wraparound of the synthetic resin into each part is improved, so that moldability is improved, defective products are reduced, and productivity can be improved.

【0028】図7は挿入筒21の第3実施形態を示す縦
断面図である。第3実施形態の挿入筒21では、特に中
間部分を設けずに眼内に挿入する可能性のある先端部分
21cのみに薄い一定の肉厚を持たせて、創口を拡大す
ることを避け、その他の部分は一様に厚みを増していく
形状にしてある。第3実施形態の場合、第1実施形態の
ものに比べて挿入筒自体の強度を増すことができるとい
う効果を持つ。
FIG. 7 is a longitudinal sectional view showing a third embodiment of the insertion tube 21. In the insertion tube 21 of the third embodiment, the tip portion 21c, which may be inserted into the eye without providing an intermediate portion, is provided with a thin and constant thickness to avoid enlarging the wound. Is shaped to increase the thickness uniformly. The third embodiment has an effect that the strength of the insertion tube itself can be increased as compared with the first embodiment.

【0029】図8は挿入筒21の第4実施形態の縦断面
図である。第4実施形態の挿入筒21では、先端部分2
1cは他の実施形態と同様に薄い一定の肉厚を持ってい
るが、先端部分の終端から連続した曲線形状をもって基
端21bに向かう形状になっている。前の実施形態と異
なり、一定の肉厚を持つ部分から滑らかに若干膨らむよ
うに肉厚が変化していくため、合成樹脂で成形した場合
に合成樹脂の流れを妨げる不連続もしくはそれに近い形
状の変化がないため、他の実施形態のものに比べて先端
部の肉厚を薄くしても合成樹脂の回り込みがよくできる
効果を持つ。
FIG. 8 is a longitudinal sectional view of a fourth embodiment of the insertion tube 21. In the insertion tube 21 of the fourth embodiment, the tip 2
1c has a thin and constant wall thickness as in the other embodiments, but has a continuous curved shape from the end of the distal end portion toward the base end 21b. Unlike the previous embodiment, since the wall thickness changes so as to swell slightly slightly from a portion having a constant wall thickness, when molded with a synthetic resin, the shape of the discontinuous or close to the discontinuous shape that hinders the flow of the synthetic resin Since there is no change, there is an effect that even when the thickness of the distal end portion is reduced as compared with those of the other embodiments, the synthetic resin can be easily turned around.

【0030】なお、この発明において、挿入筒の横断面
は、円筒形に限ることなく、例えば楕円形の筒状にして
もよい。
In the present invention, the cross section of the insertion tube is not limited to a cylindrical shape, but may be, for example, an elliptical tube.

【0031】[0031]

【発明の効果】以上説明したとおり、請求項1の発明
は、所定の記憶特性を有する変形可能な弾性体で形成し
た光学部、およびこの光学部と同材料または異種の材料
で形成して前記光学部を眼内で支える支持部とからなる
眼内挿入用レンズを、包持部材内に折り畳むことにより
小さな形状に変形させて包持し、包持部材内に連続して
形成した挿入筒の内部空間内を移動させ、挿入筒の先端
から眼内に押し出す眼内挿入用レンズの挿入器具におい
て、挿入筒の先端から基端側に所定の長さに形成した挿
入筒先端部分の厚みを一定にし、さらに挿入筒の他の部
分に比較して薄くすることにより、小さい切開創からの
眼内挿入用レンズの眼内への挿入を可能にした。
As described above, according to the first aspect of the present invention, there is provided an optical unit formed of a deformable elastic body having a predetermined memory characteristic, and the optical unit formed of the same material or a different material as the optical unit. An intraocular insertion lens consisting of a supporting part that supports the optical part in the eye, is deformed into a small shape by folding it into a holding member, is held therein, and the insertion tube is formed continuously in the holding member. In an intraocular insertion lens insertion device that moves in the internal space and pushes the insertion tube into the eye from the distal end of the insertion tube, the thickness of the distal end portion of the insertion tube formed to a predetermined length from the distal end of the insertion tube to the proximal side is constant By making it thinner than other parts of the insertion tube, the lens for insertion into the eye from a small incision can be inserted into the eye.

【0032】請求項2の発明では、挿入筒先端部から基
端部に向かって1つまたは複数の切り込みを形成するこ
とで、挿入筒先端部で眼内挿入用レンズの弾性応力を分
散させ、眼内挿入用レンズ押出し時のレンズの動きを安
定させるとともに、さらに先端部の厚さを薄くすること
を可能にした。
According to the second aspect of the present invention, by forming one or a plurality of cuts from the distal end portion of the insertion tube toward the proximal end portion, the elastic stress of the intraocular lens is dispersed at the distal end portion of the insertion tube, In addition to stabilizing the movement of the lens when the lens for insertion into the eye is pushed out, the thickness of the tip can be further reduced.

【0033】請求項3の発明では、挿入筒の先端部分を
実際に眼内に挿入する部分の厚みを薄くし、また挿入筒
を眼内に挿入する部分とほぼ一致した長さにすること
で、切開創に無理な力をかけることなく眼内挿入用レン
ズを挿入することができるとともに、挿入筒自体の強度
を十分に強くすることを可能にした。
According to the third aspect of the present invention, the tip of the insertion tube is made thinner at the portion where the insertion tube is actually inserted into the eye, and the insertion tube is made to have a length substantially coincident with the portion where the insertion tube is inserted into the eye. In addition, the intraocular lens can be inserted without applying excessive force to the incision, and the strength of the insertion tube itself can be sufficiently increased.

【0034】請求項4の発明では、挿入筒を合成樹脂の
成形加工で作製することで、実際単一の厚みでは素材が
先端部まで回り込まないために起こる成形不良を回避し
て、生産性の向上をはかることを可能にした。
According to the fourth aspect of the present invention, since the insertion tube is formed by molding of synthetic resin, it is possible to avoid molding defects caused by the fact that the material does not actually wrap around to the tip portion with a single thickness, thereby improving productivity. It is possible to improve.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明の第1実施形態に係る眼内挿入用レン
ズの挿入器具を示した縦断面図。
FIG. 1 is a longitudinal sectional view showing an insertion device for an intraocular lens according to a first embodiment of the present invention.

【図2】図1に示した挿入器具に設けた包持部材の設置
部の拡大横断面図。
FIG. 2 is an enlarged cross-sectional view of an installation portion of a holding member provided on the insertion device shown in FIG.

【図3】変形可能な眼内挿入用レンズの拡大正面図。FIG. 3 is an enlarged front view of a deformable intraocular lens.

【図4】他の変形可能な眼内挿入用レンズの拡大正面
図。
FIG. 4 is an enlarged front view of another deformable intraocular lens.

【図5】図1に示した挿入器具の挿入筒の拡大縦断面
図。
5 is an enlarged longitudinal sectional view of an insertion tube of the insertion device shown in FIG.

【図6】この発明の第2実施形態に係る挿入筒を示した
拡大斜視図。
FIG. 6 is an enlarged perspective view showing an insertion tube according to a second embodiment of the present invention.

【図7】この発明の第3実施形態に係る挿入筒を示した
拡大縦断面図。
FIG. 7 is an enlarged longitudinal sectional view showing an insertion tube according to a third embodiment of the present invention.

【図8】この発明の第4実施形態に係る挿入筒を示した
拡大縦断面図。
FIG. 8 is an enlarged vertical sectional view showing an insertion tube according to a fourth embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 眼内挿入用レンズ 2 光学部 3 支持部 4 別形態の支持部 12 器具本体 14 操作筒 15 押出し軸 16 包持部材 19 レンズ設置部 20 包持部材の先端部 21 挿入筒 21a 挿入筒の先端 21b 挿入筒の基端 21c 挿入筒の先端部分 21d 挿入筒の中間部分 21e 挿入筒の基端部分 21f 切り込み部 22 固定半割筒 23 可動半割筒 24 ヒンジ部 25 押え板 26 押え板 27 スライドストッパー DESCRIPTION OF SYMBOLS 1 Intraocular insertion lens 2 Optical part 3 Support part 4 Support part of another form 12 Instrument main body 14 Operation cylinder 15 Pushing shaft 16 Enclosure member 19 Lens installation part 20 Tip part of encapsulation member 21 Insertion cylinder 21a Tip of insertion cylinder 21b Base end of insertion tube 21c End portion of insertion tube 21d Intermediate portion of insertion tube 21e Base end portion of insertion tube 21f Notch 22 Fixed half cylinder 23 Movable half cylinder 24 Hinge part 25 Holding plate 26 Holding plate 27 Slide stopper

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 所定の記憶特性を有する変形可能な弾性
体で形成した光学部、およびこの光学部と同材料または
異種の材料で形成して前記光学部を眼内で支える支持部
とからなる眼内挿入用レンズを、包持部材内に折り畳む
ことにより小さな形状に変形させて包持し、包持部材の
先端側に連続して形成した挿入筒の内部空間内を移動さ
せ、挿入筒の先端から眼内に挿入する眼内挿入用レンズ
の挿入器具において、前記挿入筒の先端から基端側に所
定の長さに形成した挿入筒先端部分を他の部分に比較し
て薄い一定の厚みにしたことを特徴とする眼内挿入用レ
ンズの挿入器具。
1. An optical part formed of a deformable elastic body having a predetermined memory characteristic, and a support part formed of the same material or a different material and supporting the optical part in an eye. The intraocular insertion lens is deformed into a small shape by folding it into the holding member and held therein, and is moved in the internal space of the insertion tube continuously formed on the distal end side of the holding member, and In a device for inserting an intraocular lens into the eye from the distal end, the distal end portion of the insertion tube formed to a predetermined length from the distal end to the proximal end side of the insertion tube has a constant thickness that is thinner than other portions. An insertion device for an intraocular lens, which is characterized in that:
【請求項2】 挿入筒の先端部分に、1つまたは複数の
切り込みを軸方向に沿って形成したことを特徴とする請
求項1に記載の眼内挿入用レンズの挿入器具。
2. The intraocular lens insertion instrument according to claim 1, wherein one or more cuts are formed in the distal end portion of the insertion tube along the axial direction.
【請求項3】 挿入筒の先端部分は、挿入筒を眼内に挿
入する部分とほぼ一致した長さに形成したことを特徴と
する請求項1に記載の眼内挿入用レンズの挿入器具。
3. The intraocular lens insertion instrument according to claim 1, wherein the distal end portion of the insertion tube is formed to have a length substantially coincident with a portion for inserting the insertion tube into the eye.
【請求項4】 挿入筒を、合成樹脂の成形加工により作
製したことを特徴とする請求項1乃至請求項3のいずれ
かに記載の眼内挿入用レンズの挿入器具。
4. The intraocular lens insertion device according to claim 1, wherein the insertion tube is formed by molding a synthetic resin.
JP21617297A 1997-08-11 1997-08-11 Intraocular lens Pending JPH1156881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21617297A JPH1156881A (en) 1997-08-11 1997-08-11 Intraocular lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21617297A JPH1156881A (en) 1997-08-11 1997-08-11 Intraocular lens

Publications (1)

Publication Number Publication Date
JPH1156881A true JPH1156881A (en) 1999-03-02

Family

ID=16684423

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21617297A Pending JPH1156881A (en) 1997-08-11 1997-08-11 Intraocular lens

Country Status (1)

Country Link
JP (1) JPH1156881A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008528088A (en) * 2005-01-21 2008-07-31 コルネアル アンドゥストリ Flexible intraocular lens injector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008528088A (en) * 2005-01-21 2008-07-31 コルネアル アンドゥストリ Flexible intraocular lens injector

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