JPH11169391A - Soft intraocular lens - Google Patents
Soft intraocular lensInfo
- Publication number
- JPH11169391A JPH11169391A JP9343005A JP34300597A JPH11169391A JP H11169391 A JPH11169391 A JP H11169391A JP 9343005 A JP9343005 A JP 9343005A JP 34300597 A JP34300597 A JP 34300597A JP H11169391 A JPH11169391 A JP H11169391A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- intraocular lens
- support
- soft
- soft intraocular
- 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.)
- Granted
Links
Abstract
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】本発明は軟性眼内レンズに関
し、特に眼内挿入後、嚢の収縮に起因する軟性光学部の
変形を押さえることを可能にした軟性眼内レンズに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft intraocular lens, and more particularly to a soft intraocular lens capable of suppressing deformation of a soft optic portion caused by contraction of a capsule after insertion into an eye.
【０００２】[0002]
【従来の技術】眼内レンズは、白内障により除去された
水晶体の代替レンズとして機能する光学部と、該光学部
を嚢内でその中心位置に固定・保持するための細長い腕
状の支持部とから構成される。従来から、この眼内レン
ズには、光学部と支持部とをそれぞれ別部品として別個
に製作してこれを後から接合するようにしたタイプ（ツ
ウピース又はスリーピスタイプともいう）と、光学部と
支持部とを最初から一体に形成した一体型（ワンピース
タイプともいう）とが知られている。2. Description of the Related Art An intraocular lens is composed of an optical part functioning as a substitute lens for a crystalline lens removed by a cataract, and an elongated arm-shaped support part for fixing and holding the optical part at a central position in a capsule. Be composed. Conventionally, the intraocular lens includes a type in which an optical unit and a support unit are separately manufactured as separate components and then joined later (also referred to as a two-piece or three-piece type), and an optical unit. There is known an integrated type (also referred to as a one-piece type) in which a support portion is integrally formed from the beginning.
【０００３】上記ツウピース又はスリーピースタイプの
眼内レンズは、光学部を硬質の材料であるＰＭＭＡ（ポ
リメチルメタクリレート）で構成し、このＰＭＭＡ製光
学部を固定・保持するための支持部としては、ＰＭＭ
Ａ、ＰＰ（ポリプロピレン）、ポリイミドなどのモノフ
ィラメントを使用するのが一般的である。光学部と支持
部との接合は、光学部に機械的に小孔を設けておき、そ
の小孔に支持部を挿入し、ステーキング或いはレーザー
照射による融着などにより固定させる。固定の際は、光
学部の光軸に直交する平面に対して支持部が５度又は１
０度の角度をなすようにアングルをつける場合が少なく
ない。これは、レンズが嚢内に収まってから安定して位
置出しが行われる様にするためである。なお、ＰＭＭＡ
が用いられる理由は、透明性・機械加工性・体内での安
定性に優れているためである。In the above-mentioned two-piece or three-piece type intraocular lens, the optical part is made of a hard material, PMMA (polymethyl methacrylate), and a PMM is used as a supporting part for fixing and holding the PMMA optical part.
It is common to use monofilaments such as A, PP (polypropylene), and polyimide. For joining the optical part and the support part, a small hole is mechanically provided in the optical part, and the support part is inserted into the small hole and fixed by staking or fusion by laser irradiation. At the time of fixing, the support part is 5 degrees or 1 degree with respect to a plane orthogonal to the optical axis of the optical part.
In many cases, the angle is set to form an angle of 0 degrees. This is to ensure stable positioning after the lens is settled in the capsule. In addition, PMMA
Is used because it is excellent in transparency, machinability, and stability in the body.
【０００４】また、上記ワンピースタイプ（一体型）眼
内レンズは、光学部と支持部とをＰＭＭＡで一体に形成
したものが多い。図６は従来の一体型眼内レンズの平面
図、図７は従来の一体型眼内レンズの側面方向から見た
支持部形状のイメージを示す図である。これらの図にお
いて、符号１０が光学部、符号２０が支持部である。図
７のイメージ図に示されるように、このタイプの眼内レ
ンズの支持部形状も上記ツウピース又はスリーピースタ
イプの眼内レンズと同様に５度又は１０度のアングルを
もたせたものが多い。The above-mentioned one-piece type (integrated type) intraocular lens often has an optical part and a support part integrally formed of PMMA. FIG. 6 is a plan view of a conventional integrated intraocular lens, and FIG. 7 is a diagram showing an image of a shape of a support portion of the conventional integrated intraocular lens viewed from a side direction. In these figures, reference numeral 10 denotes an optical unit, and reference numeral 20 denotes a support unit. As shown in the image diagram of FIG. 7, the shape of the support portion of this type of intraocular lens often has an angle of 5 degrees or 10 degrees similarly to the two-piece or three-piece type intraocular lens.
【０００５】また、支持部の形状としては、さらにウイ
ングタイプと呼ばれるものがある。図８はウイングタイ
プの側面方向からの支持部形状のイメージを示す図であ
る。このタイプの支持部２０は、支持部が５度又は１０
度のアングルで立ち上がり、途中から光学部の光軸と直
交する平面とほぼ平行となるものである。いずれのタイ
プの支持部も嚢内に挿入されたレンズが嚢内に安定して
固定される様にデザインされたものである。Further, as a shape of the supporting portion, there is a so-called wing type. FIG. 8 is a diagram showing an image of the shape of the support portion from the side direction of the wing type. This type of support 20 has a support 5 degrees or 10 degrees.
It rises at an angle of degrees and becomes almost parallel to a plane orthogonal to the optical axis of the optical unit from the middle. Both types of supports are designed such that the lens inserted into the capsule is stably fixed within the capsule.
【０００６】また、近年、超音波乳化吸引術の普及に伴
い、術後乱視と手術浸襲の軽減とを目的とした小切開創
から挿入可能な眼内レンズが開発されている。即ち、光
学部を構成する材料として軟性材料を用いることによ
り、光学部を折り曲げて小切開創からの挿入を可能にし
た軟性眼内レンズである。この軟性眼内レンズにおける
支持部デザインについても、上述のような５度又は１０
度のアングルを持たせるタイプ又はウイングタイプのも
のが知られている。In recent years, with the spread of ultrasonic emulsification suction, an intraocular lens that can be inserted from a small incision for the purpose of reducing postoperative astigmatism and invasiveness of surgery has been developed. That is, a soft intraocular lens in which a soft material is used as a material constituting the optical unit, whereby the optical unit is bent to enable insertion from a small incision. Regarding the design of the support portion in this soft intraocular lens, the angle is set to 5 degrees or 10 degrees as described above.
A type having a certain angle or a wing type is known.
【０００７】[0007]
【発明が解決しようとする課題】ところで、眼内レンズ
が嚢内に挿入されると、嚢の内径が１０ｍｍ程度までに
収縮する。これに応じて支持部が圧縮される。一般的に
は、この支持部が圧縮されたことによって生ずる弾性力
の作用により光学部が支持される。この際に光学部にこ
の弾性力の一部が伝達される。光学部がＰＭＭＡ等の硬
性の材料で形成されている場合にはこの弾性力伝達に起
因する問題はほとんど生じない。しかしながら、光学部
が軟性の材料で構成されている場合には、嚢内への挿入
の仕方によっては、上記弾性力が光学部に伝達されると
その力によって光学部に変形若しくは歪みが生じたり、
もしくは、レンズの偏位量が一定にならない為に設計ど
おりの解像力・度数が出なくなってしまう可能性を否定
しきれないものであった。本発明は上述の背景のもとで
なされたものであり、嚢内挿入後、嚢が収縮して支持部
が圧縮されても光学部が変形若しくは歪んでしまう等の
おそれの少ない軟性眼内レンズを提供することを目的と
する。When the intraocular lens is inserted into the capsule, the inside diameter of the capsule shrinks to about 10 mm. The support is compressed accordingly. Generally, the optical section is supported by the action of elastic force generated by compression of the support section. At this time, a part of the elastic force is transmitted to the optical unit. When the optical part is formed of a hard material such as PMMA, there is almost no problem caused by the transmission of the elastic force. However, when the optical unit is made of a soft material, depending on the manner of insertion into the capsule, when the elastic force is transmitted to the optical unit, the optical unit may be deformed or distorted by the force,
Alternatively, it is impossible to deny the possibility that the resolving power and power as designed do not come out because the amount of deviation of the lens does not become constant. The present invention has been made under the above-described background, and a soft intraocular lens having a low possibility that the optical unit is deformed or distorted even if the sac contracts and the support portion is compressed after insertion into the sac. The purpose is to provide.
【０００８】[0008]
【課題を解決するための手段】上述の課題を解決するた
めの手段として、請求項１の発明は、変形可能な軟性材
料からなる光学部と、この光学部の外周部から外方に延
長された腕状の支持部であって眼内において光学部を固
定・保持するための支持部と、を有する軟性眼内レンズ
において、前記支持部の少なくともいずれかの部位が前
記光学部に向かって移動するように該支持部を外方から
圧縮する力が加えられたときに該力の少なくとも一部を
変形によって吸収して前記光学部に伝達される力を軽減
することができる折曲部を支持部に設けたことを特徴と
する軟性眼内レンズである。Means for Solving the Problems As means for solving the above-mentioned problems, the invention according to claim 1 is directed to an optical part made of a deformable soft material, and an optical part extending outward from an outer peripheral part of the optical part. A flexible intraocular lens having an arm-shaped support portion and a support portion for fixing and holding the optical portion in the eye, at least one portion of the support portion moves toward the optical portion. When a force for compressing the support portion from the outside is applied, at least a part of the force is absorbed by deformation to support a bent portion capable of reducing a force transmitted to the optical portion. A soft intraocular lens provided in a portion.
【０００９】請求項２の発明は、請求項１に記載の軟性
眼内レンズにおいて、前記光学部に伝達される力は、こ
の光学部をその光軸に平行な方向に移動させようとする
力であり、前記折曲部は前記光学部をその光軸に平行な
方向に移動させようとする力の少なくとも一部を変形に
よって吸収するものであることを特徴とする軟性眼内レ
ンズである。According to a second aspect of the present invention, in the soft intraocular lens according to the first aspect, the force transmitted to the optical unit is a force for moving the optical unit in a direction parallel to its optical axis. Wherein the bent portion absorbs at least a part of a force for moving the optical portion in a direction parallel to the optical axis by deformation, and is a flexible intraocular lens.
【００１０】請求項３の発明は、請求項１又は２に記載
の軟性眼内レンズにおいて、前記支持部は、前記光学部
近傍の根元部から外側に向かうにしたがって前記光学部
の光軸に直交する平面に対して第１の角度をなすように
形成され、前記折曲部は、前記支持部の根元部より外方
にある位置において光学部の光軸に直交する平面に対し
て前記第１の角度と反対の第２の角度をなすように折り
曲げられた第１折曲部と、この第１折曲部より外方にあ
る位置において前記光学部の光軸に直交する平面に対し
て前記第２の角度と反対の第３の角度をなすように折り
曲げられた第２折曲部と、を有することを特徴とする軟
性眼内レンズである。According to a third aspect of the present invention, in the soft intraocular lens according to the first or second aspect, the support portion is orthogonal to an optical axis of the optical portion as going outward from a root near the optical portion. The bent portion is formed so as to form a first angle with respect to a plane to be bent. A first bent portion bent to form a second angle opposite to the angle of the first bent portion, and a position outside the first bent portion with respect to a plane orthogonal to the optical axis of the optical portion. A second bent portion bent so as to form a third angle opposite to the second angle.
【００１１】請求項４の発明は、請求項３に記載の軟性
眼内レンズにおいて、前記第１の角度が１２°以下であ
ることを特徴とする軟性眼内レンズである。A fourth aspect of the present invention is the soft intraocular lens according to the third aspect, wherein the first angle is equal to or less than 12 °.
【００１２】請求項５の発明は、請求項３又は４に記載
の軟性眼内レンズにおいて、前記支持部の根元部から前
記第１折曲部までの距離が３ｍｍ以内であることを特徴
とする軟性眼内レンズである。According to a fifth aspect of the present invention, in the soft intraocular lens according to the third or fourth aspect, a distance from a root of the supporting portion to the first bent portion is within 3 mm. It is a soft intraocular lens.
【００１３】請求項６の発明は、請求項１ないし５のい
ずれかに記載の軟性眼内レンズにおいて、前記軟性眼内
レンズが前記光学部と支持部とが一体に形成された一体
型であることを特徴とする軟性眼内レンズであるAccording to a sixth aspect of the present invention, in the flexible intraocular lens according to any one of the first to fifth aspects, the flexible intraocular lens is an integral type in which the optical section and the support section are integrally formed. A soft intraocular lens characterized by the fact that
【００１４】請求項７の発明は、請求項１ないし６のい
ずれかに記載の軟性眼内レンズにおいて、前記支持部が
前記光学部を構成する軟性材料に比較して硬性の材料で
構成されていることを特徴とする軟性眼内レンズであ
る。According to a seventh aspect of the present invention, in the flexible intraocular lens according to any one of the first to sixth aspects, the support portion is made of a material that is harder than a soft material that forms the optical portion. Is a soft intraocular lens.
【００１５】[0015]
【発明の実施の形態】（実施例１）図１は本願発明の実
施例１にかかる軟性眼内レンズの構成を示す図であって
図１（ａ）はその平面図であり図１（ｂ）はその側面図
であり、図２は図１（ｂ）の部分拡大図である。(Embodiment 1) FIG. 1 is a view showing a configuration of a soft intraocular lens according to Embodiment 1 of the present invention, and FIG. 1 (a) is a plan view thereof and FIG. ) Is a side view thereof, and FIG. 2 is a partially enlarged view of FIG.
【００１６】図１において、この軟性眼内レンズは、光
学部１と、この光学部１の外周部から外方に延長された
２本の腕状の支持部２とが一体に形成された一体型の軟
性眼内レンズである。In FIG. 1, this soft intraocular lens has an optical part 1 and two arm-shaped support parts 2 extending outward from the outer peripheral part of the optical part 1 to be integrally formed. It is a body-shaped soft intraocular lens.
【００１７】光学部１は、後述する軟性光学部材からな
る円形凸レンズであり、その外径は約５．０〜６．５ｍ
ｍφである。The optical section 1 is a circular convex lens made of a flexible optical member described later, and has an outer diameter of about 5.0 to 6.5 m.
mφ.
【００１８】支持部２は、光学部１の外周部であって光
学部１の中心Ｏを中心とする点対象関係にある２つの部
位から外方に向けてそれぞれ延長されたＰＭＭＡ製の２
本の腕状体である。この支持部２の平面視の形状は、図
１（ａ）に示されるように、光学部１との境目付近であ
る根元部２２から外方に向かうにつれて光学部から遠ざ
かる率が減少して先端部近傍では光学部１と大略同心円
の関係となるような曲線形状をなしている。The support portion 2 is made of PMMA 2 extending outward from two portions which are the outer peripheral portion of the optical portion 1 and have a point symmetry with respect to the center O of the optical portion 1.
It is an arm of a book. As shown in FIG. 1A, the shape of the support portion 2 in a plan view is such that the rate of moving away from the optical portion from the root portion 22 near the boundary with the optical portion 1 decreases, and In the vicinity of the section, the optical section 1 has a curved shape that is substantially concentric with the optical section 1.
【００１９】支持部２の側面視形状は、図１（ｂ）及び
図２に示されるように、根元部２１の基部２１ａから外
側に向かうにしたがって光学部１の光軸に直交する平面
に対して第１の角度α1 をなすように形成され、基部２
１ａから距離ａの位置に第１折曲部２２が形成され、先
端近傍における前記光学部１と大略同心円関係となる部
位における接線に対して距離ｂの位置に第２折曲部２３
が形成されたものである。第２折曲部２３より外側に位
置する部分は光軸に直交する平面に対して略平行になる
ように形成されている。As shown in FIG. 1B and FIG. 2, the shape of the support portion 2 in a side view is perpendicular to the optical axis of the optical portion 1 from the base 21a of the root portion 21 toward the outside. The base 2 is formed so as to form a first angle α 1.
The first bent portion 22 is formed at a distance a from the first bent portion 1a, and the second bent portion 23 is positioned at a distance b with respect to a tangent at a portion which is substantially concentric with the optical portion 1 near the tip.
Is formed. A portion located outside the second bent portion 23 is formed so as to be substantially parallel to a plane orthogonal to the optical axis.
【００２０】距離ａは３ｍｍ以内に設定される。この実
施例では１ｍｍとした。角度α1 は１２°以内に設定さ
れる。この実施例ではα1 を約５°とした。距離ｂは数
ｍｍ以内に設定される。この実施例では距離ｂを１．５
ｍｍとした。また、第１折曲部２２の折り曲げの角度
は、第１折曲部２２と第２折曲部２３との間の部分が前
記光軸と平行な平面に対してα2 の角度をなすように設
定される。第２折曲部の折り曲げ角度は、第２折曲部２
３より外側に位置する部分が光軸に直交する平面に対し
て略平行になるような角度に設定される。ここで支持部
２の先端と光学部１の外周端部とを結んだ直線が前記光
軸と直交する平面となす角度をβとすると、上記α
2 は、このβが約５°になるように設定される。この実
施例ではα2 は約１７°となる。The distance a is set within 3 mm. In this embodiment, it is 1 mm. Angle alpha 1 is set within 12 °. In this embodiment, α 1 is set to about 5 °. The distance b is set within several mm. In this embodiment, the distance b is 1.5
mm. The angle of the first bent portion 22 is set so that the portion between the first bent portion 22 and the second bent portion 23 forms an angle α 2 with a plane parallel to the optical axis. Is set to The bending angle of the second bent portion is the second bent portion 2
The angle is set such that a portion located outside of 3 is substantially parallel to a plane orthogonal to the optical axis. Here, if an angle between a straight line connecting the tip of the support portion 2 and the outer peripheral end of the optical portion 1 with a plane orthogonal to the optical axis is β, the above α
2 is set so that this β is about 5 °. In this embodiment, α 2 is about 17 °.
【００２１】上述の構成の一体型の軟性眼内レンズは、
次のようにして製作した。すなわち、ＰＭＭＡを略円板
状に形成したボタン材（直径約１６．５ｍｍφ）の中央
部に約６．５ｍｍφの貫通孔をあけた円環状体２００を
形成した。次に、円環状体２００の貫通孔に以下の配合
による単量体混合物を充填し、窒素圧２．０Ｋｇ／ｃｍ
2 、温度６０℃・２時間の加圧重合を行い、その後、８
０℃で２時間の保持、１００℃で２時間の保持をし、重
合を完了させた。これにより、ＰＭＭＡの円環状体２０
０の中央部の貫通孔の部分が軟性光学部材１００で完全
にふさがれかつ結合されてこれらが一体となった円板状
のレンズ素材３００を得た。図３はレンズ素材３００の
斜視図、図４はレンズ素材３００の断面図である。The integrated soft intraocular lens having the above structure is
It was manufactured as follows. That is, an annular body 200 having a through-hole of about 6.5 mmφ was formed at the center of a button material (diameter of about 16.5 mmφ) formed of a substantially disc-shaped PMMA. Next, the through-hole of the annular body 200 is filled with the monomer mixture having the following composition, and the nitrogen pressure is set to 2.0 kg / cm.
2. Perform pressure polymerization at a temperature of 60 ° C for 2 hours.
The polymerization was completed by holding at 0 ° C. for 2 hours and holding at 100 ° C. for 2 hours. Thereby, the annular body 20 of PMMA is formed.
The portion of the through hole at the center of No. 0 was completely closed and joined by the flexible optical member 100 to obtain a disc-shaped lens material 300 in which these were integrated. FIG. 3 is a perspective view of the lens material 300, and FIG. 4 is a sectional view of the lens material 300.
【００２２】 重量部 ・ｎーブチルアクリレート ４２ ・フェニルエチルメタクリレート ４９ ・パーフロロオクチルエチル オキシプロピレンメタクリレート ９ ・エチレングリコールジメタクリレート ３ ・アゾビスイソブチロニトリル ０．３Parts by weight n-butyl acrylate 42 phenylethyl methacrylate 49 perfluorooctylethyl oxypropylene methacrylate 9 ethylene glycol dimethacrylate 3 azobisisobutyronitrile 0.3
【００２３】次に、上記レンズ素材３００に、−１０℃
の冷気を吹きかけながら光学面形成のための切削を行っ
た後、ミーリングによりボタンからワンピース形状を切
り出す加工を行って所定のレンズ形状及び支持部形状を
形成した。図５はミーリング４００によってレンズ素材
３００を切削加工する様子を示す図である。こうして加
工が終了したものを５日間バレル研磨することによっ
て、実施例１にかかる一体型の軟性眼内レンズを得た。Next, the lens material 300 is set at -10.degree.
After the cutting for forming the optical surface was performed while blowing the cold air, a process of cutting out a one-piece shape from the button by milling was performed to form a predetermined lens shape and a supporting portion shape. FIG. 5 is a diagram showing a state where the lens material 300 is cut by the milling 400. The thus-processed product was barrel-polished for 5 days to obtain an integrated soft intraocular lens according to Example 1.
【００２４】（実施例２）実施例１におけるα1 の角度
を約１０°とし、これにともなってα2 の角度を約２９
°にした外は実施例１と同じ構成にしたものを実施例２
とした。[0024] (Example 2) and about 10 ° the angle of alpha 1 in Example 1, about an angle of alpha 2 along with this 29
The same configuration as in the first embodiment except for the angle of
And
【００２５】（比較例１）支持部形状を図７に示される
従来タイプにし、α＝５°とした外は実施例１と同じ構
成にしたものを比較例１とした。Comparative Example 1 Comparative Example 1 was the same as that of Example 1 except that the shape of the support portion was the conventional type shown in FIG. 7 and α = 5 °.
【００２６】（比較例２）支持部形状を図８に示される
従来のウイングタイプにし、α＝１０°とした外は実施
例１と同じ構成にしたものを比較例２とした。Comparative Example 2 Comparative Example 2 was the same as that of Example 1 except that the shape of the support portion was the conventional wing type shown in FIG. 8 and α = 10 °.
【００２７】（比較例３）光学部及び支持部ともにＰＭ
ＭＡで一体に形成された従来からある一体型眼内レンズ
で、支持部形状が図７に示される従来型の形状をなした
ものを比較例３とした。(Comparative Example 3) PM for both the optical part and the support part
A comparative example 3 was a conventional integrated intraocular lens integrally formed of MA and having a support portion having a conventional shape shown in FIG.
【００２８】支持部形状を図８に示される従来のウイン
グタイプにし、α＝１０°とした外は比較例３と同じ構
成にしたものを比較例４とした。Comparative Example 4 was the same as Comparative Example 3 except that the shape of the supporting portion was the conventional wing type shown in FIG. 8 and α = 10 °.
【００２９】以上の実施例１，２、並びに、比較例１〜
４について、以下の試験を行った。 （１）解像力・パワー試験 この試験は、内径が１０ｍｍφのリング内に各レンズを
固定し、解像力及びパワー（度数）の測定を行う試験で
ある。Examples 1 and 2 and Comparative Examples 1 to
For No. 4, the following test was performed. (1) Resolution / Power Test This test is a test in which each lens is fixed in a ring having an inner diameter of 10 mmφ, and the resolution and power (frequency) are measured.
【００３０】解像力・パワー試験の結果は、実施例１，
２並びに比較例３，４については、１０ｍｍφのリング
に収まり、解像力及びパワーともに設計どうりの値を維
持することが確認された。しかし、比較例１，２につい
ては、１０ｍｍφリング固定後、徐々に光学部が浮き上
がってしまい、光学部が変形してしまった。それゆえ、
１０ｍｍφのリング中では、比較例１，２のレンズの解
像度及びパワーについては測定不能であった。The results of the resolving power / power test are shown in Examples 1 and 2.
2 and Comparative Examples 3 and 4 were fit in a 10 mmφ ring, and it was confirmed that both the resolving power and the power maintained the values as designed. However, in Comparative Examples 1 and 2, after the 10 mmφ ring was fixed, the optical portion gradually floated up, and the optical portion was deformed. therefore,
In the ring of 10 mmφ, the resolution and power of the lenses of Comparative Examples 1 and 2 could not be measured.
【００３１】（２）圧縮によるボールティング試験 この試験は、図９に示されるように、レンズ３若しくは
３０を保持径可変治具５０内にセットし、保持径可変治
具５０の保持径を１１ｍｍφ及び１０ｍｍφに圧縮し、
そのときに光学部１の中心が光軸方向に移動する距離を
デジタル式測定顕微鏡（オリンパス社製 ＳＴＭ５ー３
２２）で測定する試験である。(2) Compression vaulting test In this test, as shown in FIG. 9, the lens 3 or 30 was set in the holding diameter variable jig 50, and the holding diameter of the variable holding diameter jig 50 was 11 mmφ. And 10mmφ,
At that time, the distance that the center of the optical unit 1 moves in the optical axis direction is measured by a digital measuring microscope (STM5-3 manufactured by Olympus Corporation).
This is a test measured in 22).
【００３２】圧縮によるボールティング試験の結果は、
図１０に示す通りであった。図１０から明らかなよう
に、実施例１，２は、従来のＰＭＭＡ製の一体型（光学
部もＰＭＭＡ＝硬性材料で構成）で図７に示されるタイ
プ（α＝５°）及び図８に示されるウイングタイプ（α
＝１０°）のもの（比較例３，４）に比較して、１１ｍ
ｍφ及び１０ｍｍφのいずれの圧縮時にも殆ど差がな
く、極めて良好であることがわかる。The result of the vaulting test by compression is:
It was as shown in FIG. As is clear from FIG. 10, Examples 1 and 2 are conventional PMMA integrated types (the optical part is also composed of PMMA = hard material) and the type shown in FIG. 7 (α = 5 °) and FIG. Wing type indicated (α
= 10 °) (comparative examples 3 and 4)
It can be seen that there is almost no difference at the time of compression of both mφ and 10 mmφ, which is extremely good.
【００３３】しかしながら、光学部が軟性材料で構成さ
れ、支持部が図７に示す構成のもの（α＝５°）及び支
持部が図８に示すウイングタイプのもの（α＝１０
°）、すなわち、比較例１，２のものは１０ｍｍφ圧縮
時に光学部が光軸方向に大きく移動するとともに変形を
きたしてしまった。However, the optical part is made of a soft material, the supporting part has the structure shown in FIG. 7 (α = 5 °) and the supporting part has the wing type shown in FIG. 8 (α = 10 °).
°), that is, in the case of Comparative Examples 1 and 2, the optical part greatly moved in the direction of the optical axis when compressed by 10 mmφ, and was deformed.
【００３４】以上の結果が得られるのは以下の作用によ
るものと推定される。すなわち、図７に示される従来タ
イプのものは、図１１（ａ）に示したように、支持部の
圧縮時にその圧縮力が支持部の長手方向をそのまま伝達
して光学部に至り、光学部を光軸方向に押し上げ若しく
は変形させてしまうものと考えられる。It is presumed that the above results are obtained due to the following effects. That is, in the conventional type shown in FIG. 7, as shown in FIG. 11A, when the support portion is compressed, the compressive force is transmitted in the longitudinal direction of the support portion as it is to the optical portion, and the optical portion is compressed. Is pushed up or deformed in the optical axis direction.
【００３５】図８に示される従来のウイングタイプのも
のは、図１１（ｂ）に示したように、支持部の圧縮時に
その圧縮力が一度分散されるが、分散が不十分なために
圧縮力の少なからぬ部分が光学部に伝達し、光学部を光
軸方向に押し上げ若しくは変形させてしまうものと考え
られる。In the conventional wing type shown in FIG. 8, as shown in FIG. 11 (b), the compression force is dispersed once when the support portion is compressed, but the compression force is insufficient due to insufficient dispersion. It is considered that a considerable portion of the force is transmitted to the optical unit, and pushes up or deforms the optical unit in the optical axis direction.
【００３６】これに対して、本発明の実施例のものは、
図１１（ｃ）に示されるように、圧縮力が光学部に至る
間に二度分散されるので、光学部に加わる力が適度に減
衰されるものと考えられる。On the other hand, in the embodiment of the present invention,
As shown in FIG. 11C, since the compressive force is dispersed twice before reaching the optical unit, it is considered that the force applied to the optical unit is appropriately attenuated.
【００３７】[0037]
【発明の効果】以上詳述したように、本発明は、支持部
の少なくともいずれかの部位が光学部に向かって移動す
るように支持部を外方から圧縮する力が加えられたとき
にこの圧縮力の少なくとも一部を変形によって吸収して
前記光学部に伝達される力を軽減することができる折曲
部を支持部に設けたことを特徴とし、これによって、嚢
内挿入後、嚢が収縮して支持部が圧縮されても光学部が
変形若しくは歪んでしまう等のおそれの少ない軟性眼内
レンズを得ている。As described above in detail, the present invention is applicable to a case where a force is applied to compress the support from the outside so that at least any part of the support moves toward the optical unit. A bent portion capable of absorbing at least a part of the compressive force by deformation to reduce a force transmitted to the optical portion is provided on the support portion, whereby the capsule is contracted after insertion into the capsule. As a result, a flexible intraocular lens is obtained in which the optical section is less likely to be deformed or distorted even if the support section is compressed.
【図１】本願発明の実施例１にかかる軟性眼内レンズの
構成を示す図であって図１（ａ）はその平面図であり図
１（ｂ）はその側面図である。FIG. 1 is a diagram showing a configuration of a soft intraocular lens according to Example 1 of the present invention, wherein FIG. 1 (a) is a plan view and FIG. 1 (b) is a side view.
【図２】図１（ｂ）の部分拡大図である。FIG. 2 is a partially enlarged view of FIG. 1 (b).
【図３】レンズ素材の斜視図である。FIG. 3 is a perspective view of a lens material.
【図４】レンズ素材の断面図である。FIG. 4 is a sectional view of a lens material.
【図５】レンズ素材の加工の様子を示す図である。FIG. 5 is a diagram showing a state of processing a lens material.
【図６】従来の一体型眼内レンズの平面図である。FIG. 6 is a plan view of a conventional integrated intraocular lens.
【図７】従来の一体型眼内レンズの側面方向から見た支
持部形状のイメージを示す図である。FIG. 7 is a view showing an image of a shape of a support portion of a conventional integrated intraocular lens as viewed from the side.
【図８】ウイングタイプの側面方向からの支持部形状の
イメージを示す図である。FIG. 8 is a view showing an image of a shape of a support portion from a side direction of a wing type.
【図９】圧縮によるボールティング試験の様子を示す図
である。FIG. 9 is a view showing a state of a vaulting test by compression.
【図１０】圧縮によるボールティング試験の結果を示す
図である。FIG. 10 is a diagram showing a result of a vaulting test by compression.
【図１１】実施例及び比較例の作用説明図である。FIG. 11 is an operation explanatory view of an example and a comparative example.
１，１０…光学部 ２，２０…支持部 ３，３０…眼内レンズ ２１…根元部 ２２…第１折曲部 ２３…第２折曲部 1, 10 optical part 2, 20 support part 3, 30 intraocular lens 21 root part 22 first bent part 23 second bent part
Claims (7)
この光学部の外周部から外方に延長された腕状の支持部
であって眼内において光学部を固定・保持するための支
持部と、を有する軟性眼内レンズにおいて、 前記支持部の少なくともいずれかの部位が前記光学部に
向かって移動するように該支持部を外方から圧縮する力
が加えられたときに該力の少なくとも一部を変形によっ
て吸収して前記光学部に伝達される力を軽減することが
できる折曲部を支持部に設けたことを特徴とする軟性眼
内レンズ。1. An optical part made of a deformable soft material,
A flexible intraocular lens having an arm-shaped support portion extending outward from the outer peripheral portion of the optical portion and fixing and holding the optical portion in the eye, wherein at least the support portion When a force for compressing the support portion from outside is applied so that any portion moves toward the optical portion, at least a part of the force is absorbed by deformation and transmitted to the optical portion. A soft intraocular lens, wherein a bent portion capable of reducing a force is provided on a support portion.
て、 前記光学部に伝達される力は、この光学部をその光軸に
平行な方向に移動させようとする力であり、前記折曲部
は前記光学部をその光軸に平行な方向に移動させようと
する力の少なくとも一部を変形によって吸収するもので
あることを特徴とする軟性眼内レンズ。2. The soft intraocular lens according to claim 1, wherein the force transmitted to the optical unit is a force for moving the optical unit in a direction parallel to an optical axis of the optical unit. A soft intraocular lens, wherein the curved portion absorbs at least a part of a force for moving the optical portion in a direction parallel to the optical axis by deformation.
において、 前記支持部は、前記光学部近傍の根元部から外側に向か
うにしたがって前記光学部の光軸に直交する平面に対し
て第１の角度をなすように形成され、 前記折曲部は、前記支持部の根元部より外方にある位置
において光学部の光軸に直交する平面に対して前記第１
の角度と反対の第２の角度をなすように折り曲げられた
第１折曲部と、この第１折曲部より外方にある位置にお
いて前記光学部の光軸に直交する平面に対して前記第２
の角度と反対の第３の角度をなすように折り曲げられた
第２折曲部と、を有することを特徴とする軟性眼内レン
ズ。3. The soft intraocular lens according to claim 1, wherein the supporting portion is arranged on a plane perpendicular to the optical axis of the optical unit as going outward from a root near the optical unit. The bent portion is formed so as to form a first angle, and the bent portion is located outside the root portion of the support portion with respect to a plane orthogonal to the optical axis of the optical portion.
A first bent portion bent to form a second angle opposite to the angle of the first bent portion, and a position outside the first bent portion with respect to a plane orthogonal to the optical axis of the optical portion. Second
A second bent portion bent so as to form a third angle opposite to the angle of the soft intraocular lens.
て、 前記第１の角度は１２°以下であることを特徴とする軟
性眼内レンズ。4. The soft intraocular lens according to claim 3, wherein the first angle is 12 ° or less.
において、 前記支持部の根元部から前記第１折曲部までの距離が３
ｍｍ以内であることを特徴とする軟性眼内レンズ。5. The soft intraocular lens according to claim 3, wherein a distance from a root of the support to the first bent portion is three.
A soft intraocular lens, which is within mm.
性眼内レンズにおいて、 前記軟性眼内レンズが前記光学部と支持部とが一体に形
成された一体型であることを特徴とする軟性眼内レン
ズ。6. The soft intraocular lens according to claim 1, wherein the soft intraocular lens is an integral type in which the optical unit and the support unit are integrally formed. Flexible intraocular lens.
性眼内レンズにおいて、 前記支持部が前記光学部を構成する軟性材料に比較して
硬性の材料で構成されていることを特徴とする軟性眼内
レンズ。7. The soft intraocular lens according to claim 1, wherein the support portion is made of a material that is harder than a soft material that forms the optical portion. Soft intraocular lens.
Priority Applications (17)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34300597A JP3297685B2 (en) | 1997-12-12 | 1997-12-12 | Flexible intraocular lens |
| PCT/JP1998/005370 WO1999027978A1 (en) | 1997-12-02 | 1998-11-30 | Intraocular lenses and process for producing molded-in type intraocular lenses |
| KR10-1999-7006864A KR100438477B1 (en) | 1997-12-02 | 1998-11-30 | Intraocular lenses and process for producing molded-in type intraocular lenses |
| BRPI9807142-4A BR9807142B1 (en) | 1997-12-02 | 1998-11-30 | gelatinous intraocular lens. |
| EP98955984A EP0968727B1 (en) | 1997-12-02 | 1998-11-30 | Intraocular lenses and process for producing molded-in type intraocular lenses |
| DE69839801T DE69839801D1 (en) | 1997-12-02 | 1998-11-30 | INTRAOCULAR LENSES AND METHOD FOR THE PRODUCTION OF INGREDIENT INTRAOCULAR LENSES |
| NZ509286A NZ509286A (en) | 1997-12-02 | 1998-11-30 | Haptic portion of soft intraocular lens absorbs compressive forces applied to optic portion of lens |
| AU12625/99A AU751172B2 (en) | 1997-12-02 | 1998-11-30 | Intraocular lenses and process for producing molded-in type intraocular lenses |
| EP08158223A EP1961431A1 (en) | 1997-12-02 | 1998-11-30 | Intraocular lenses and process for producing molded-in type intraocular lenses |
| CA002279213A CA2279213A1 (en) | 1997-12-02 | 1998-11-30 | Intraocular lenses and process for producing molded-in type intraocular lenses |
| CNB988022052A CN1250296C (en) | 1997-12-02 | 1998-11-30 | Intraocular lenses and process for producing molded-in type intraocular lenses |
| US09/341,848 US6585768B2 (en) | 1997-12-02 | 1998-11-30 | Intraocular lenses and process for the producing molded-in type intraocular lenses |
| ES98955984T ES2310015T3 (en) | 1997-12-02 | 1998-11-30 | INTRAOCULAR LENS AND PROCEDURE TO PRODUCE MOLDED TYPE INTRAOCULAR LENSES. |
| NZ336670A NZ336670A (en) | 1997-12-02 | 1998-11-30 | Intraocular lens with soft copolymer optic portion and hard polymer haptic portion |
| TW087119878A TW381014B (en) | 1997-12-02 | 1998-12-01 | Intraocular lens and manufacturing method for integrated intraocular lens |
| ARP980106078A AR017706A1 (en) | 1997-12-02 | 1998-12-01 | WHITE INTRAOCULAR LENS. |
| US10/445,014 US20030193100A1 (en) | 1997-12-02 | 2003-05-27 | Intraocular lens and process for the production of one-piece intraocular lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34300597A JP3297685B2 (en) | 1997-12-12 | 1997-12-12 | Flexible intraocular lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11169391A true JPH11169391A (en) | 1999-06-29 |
| JP3297685B2 JP3297685B2 (en) | 2002-07-02 |
Family
ID=18358208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34300597A Expired - Fee Related JP3297685B2 (en) | 1997-12-02 | 1997-12-12 | Flexible intraocular lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3297685B2 (en) |
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