JPH05313107A - Multifocal contact lens - Google Patents
Multifocal contact lensInfo
- Publication number
- JPH05313107A JPH05313107A JP4120663A JP12066392A JPH05313107A JP H05313107 A JPH05313107 A JP H05313107A JP 4120663 A JP4120663 A JP 4120663A JP 12066392 A JP12066392 A JP 12066392A JP H05313107 A JPH05313107 A JP H05313107A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- refractive index
- rod
- contact lens
- microlenses
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
- G02C7/041—Contact lenses for the eyes bifocal; multifocal
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/022—Ophthalmic lenses having special refractive features achieved by special materials or material structures
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はコンタクトレンズに関
し、特に老視に対する視力補正用コンタクトレンズ（以
下老視用コンタクトレンズと称する。）に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact lens, and more particularly to a contact lens for correcting visual acuity for presbyopia (hereinafter referred to as a contact lens for presbyopia).
【０００２】[0002]
【従来の技術】従来の老視用コンタクトレンズを、光学
的な機能の面から分類すると視軸移動型と遠近同時視型
に大別できる。視軸移動型の場合には、遠景、近景それ
ぞれに焦点を合わせることから、それぞれの像は鮮明で
あるが、レンズの回転を防止する必要がある。回転防止
のためにレンズ下部の重量を大きくするプリズムバラス
トタイプでは視軸の合わせ方が難しく、かつプリズムバ
ラストをつけることにより厚みが増し装用感が低下す
る。一方、中心部と周辺部とに遠用、近用それぞれを設
けるタイプでは回転防止は必要ないが、瞳孔径の影響を
強く受けること、遠景と近景とでの像の跳躍が生ずると
いう問題点を有している。2. Description of the Related Art Conventional presbyopia contact lenses can be roughly classified into a visual axis moving type and a perspective simultaneous vision type when they are classified in terms of optical function. In the case of the visual axis moving type, since the distant view and the near view are focused, the respective images are clear, but it is necessary to prevent the rotation of the lens. In the prism ballast type in which the weight of the lower part of the lens is increased to prevent rotation, it is difficult to align the visual axis, and the prism ballast increases the thickness and reduces the wearing comfort. On the other hand, rotation prevention is not required for the type in which the distance portion and the distance portion are provided in the central portion and the peripheral portion, respectively. Have
【０００３】遠近同時視型では遠近二つのゾーンが共軸
になっていて、双方のゾーンが瞳孔領域内にあるように
し、遠近二つの像が網膜の上に結ばれる。遠景、近景の
内、見たい方を選択していることになる。このタイプに
は非球面型と回折ゾーン型があるが、前者は瞳孔径の影
響が大きく、二重像現象が出ることもあり、また、老視
の進んだ人、遠近の屈折力の差の大きい人に適したレン
ズが作りにくい。最近、光の屈折に加えて回折光を組み
合わせたレンズが開発されたが、瞳孔径の影響は小さい
という特徴は有するが、遠近像共にコントラストが低
く、近景にゴースト現象がでるという問題がある。In the perspective perspective type, the two perspective zones are coaxial with each other so that both zones are within the pupil region, and the two perspective images are formed on the retina. This means that you have selected the distant view or near view that you want to see. There are aspherical type and diffractive zone type in this type, but in the former, the influence of the pupil diameter is large and double image phenomenon may occur, and in the case of people with advanced presbyopia and the difference in refractive power between near and far. It is difficult to make a lens suitable for large people. Recently, a lens that combines diffracted light in addition to refraction of light has been developed. Although it has a characteristic that the influence of the pupil diameter is small, there is a problem that the contrast is low in both perspective images and a ghost phenomenon appears in the near view.
【０００４】また、遠近それぞれのレンズの屈折力の決
定、レンズサイズ、ベースカーブなど、レンズ処方、フ
ィッティングが難しい。Further, it is difficult to determine the refracting power of each lens in the distance and the distance, the lens size, the base curve and the like, and the lens prescription and fitting.
【０００５】[0005]
【発明が解決しようとする課題】本発明の課題は、上述
のような従来の老視用コンタクトレンズの問題点を解決
した新規な老視用コンタクトレンズ、すなわち、優れた
矯正視力が得られ、かつレンズ処方、フィッティングが
容易なレンズを提供することを目的とするものである。The object of the present invention is to provide a novel contact lens for presbyopia which solves the problems of the conventional contact lenses for presbyopia as described above, that is, excellent corrected visual acuity can be obtained. Moreover, it is an object of the present invention to provide a lens in which lens prescription and fitting are easy.
【０００６】[0006]
【課題を解決するための手段】本発明者は、遠景、近景
それぞれ鮮明な像が得られることが重要であり、かつ瞳
孔サイズの影響を受けず、装用感の良い、そしてレンズ
の処方、フィッティングも容易な老視用コンタクトレン
ズを開発するために鋭意研究を重ね、本発明を見出すに
到った。SUMMARY OF THE INVENTION It is important for the present inventor to obtain clear images in the distant view and near view, and is not affected by the size of the pupil to provide a comfortable fit and prescription and fitting of lenses. In order to develop a contact lens for presbyopia that is easy to carry out, the inventors have earnestly studied to find the present invention.
【０００７】本発明は遠用、近用それぞれの所要屈折力
を、屈折率の異なる微小部分をレンズ内に分布させるこ
とによって発揮させるマルチフォーカルコンタクトレン
ズである。屈折率の異なる微小部分の大きさは小さいほ
ど好ましいが、０．２mm2 以下であることが好ましい。
これ以上大きいと像の歪みが発生する。大きさが０．２
mm2 以下であれば大きさの分布は特に問題ではないが
０．００２mm2 以下に小さく分布させることは難しい。
屈折率の異なる微小部分のレンズ内分布状態について
は、それぞれをレンズの上部と下部或いは中心部と周辺
部とに集中的に分布させることは好ましくなく、レンズ
全体に均質に分布させるほうが好ましい。The present invention is a multifocal contact lens that exhibits the required refractive power for distance and near vision by distributing minute portions having different refractive indexes in the lens. It is preferable that the size of the minute portion having a different refractive index is smaller, but it is preferably 0.2 mm 2 or less.
If it is larger than this, image distortion occurs. Size 0.2
mm 2 but is not a particular problem distribution of magnitude if the following be small distributed 0.002 mm 2 or less is difficult.
Regarding the distribution state of minute portions having different refractive indices in the lens, it is not preferable to concentrate each of them in the upper portion and the lower portion of the lens or in the central portion and the peripheral portion, and it is preferable to distribute them uniformly over the entire lens.
【０００８】遠用微小部分と近用微小部分の割合は使用
目的によって任意にとりうるが４：１〜１：４、好まし
くは２：１〜１：２の範囲で決めればよい。遠視用、近
視用それぞれの所要屈折力は通常のレンズ処方を行う方
法にて、角膜径に適したベースカーブも通常のレンズ処
方を行う方法にて求めた値を用いることができる。The ratio between the distance minute portion and the near minute portion can be arbitrarily set according to the purpose of use, but it may be determined in the range of 4: 1 to 1: 4, preferably 2: 1 to 1: 2. For the required refractive powers for hyperopia and myopia, the values obtained by the method of performing a normal lens prescription and the values obtained by the method of performing a normal lens prescription for the base curve suitable for the cornea diameter can be used.
【０００９】レンズの製造方法は特に制限されるもので
はないが、（ａ）屈折率の異なる２種又は３種のポリマ
ーを所定の太さの棒状にし、それらを束ねて熱圧縮しロ
ッドを製造する、或いは（ｂ）遠視用、近視用いずれか
の屈折率を有する所定の太さのポリマーを、他の屈折率
となる組成のモノマーに浸漬し重合することによってロ
ッドを製造する。ついで、これらのロッドを切削、研磨
する。The method for producing the lens is not particularly limited, but (a) two or three types of polymers having different refractive indexes are formed into rods having a predetermined thickness, and they are bundled and thermally compressed to produce a rod. Alternatively, or (b) a polymer having a predetermined thickness having a refractive index for hyperopia or myopia is immersed in a monomer having a composition having another refractive index and polymerized to produce a rod. Then, these rods are cut and polished.
【００１０】後者の製法、すなわち、（ｂ）法では、所
定の太さのポリマーが少なく、モノマーがあまりに多い
と、モノマー重合によって得られる微小部分が大きくな
りすぎるので、所定の太さのポリマーが囲む範囲が０．
０２〜０．２mm2 程度になるように所定の太さのポリマ
ーの使用量、太さ等を調整する。レンズの前面および後
面が球面である通常のレンズ以外にもレンズの前面或い
は後面を非球面にすることによって遠方或いは近方の屈
折力の差異、アヂションパワーを変えることができる。
さらには従来用いられているトーリックレンズ加工法を
用いれば遠近両用のトーリックコンタクトレンズも作る
ことができる。In the latter production method, that is, in the method (b), when the amount of the polymer having the predetermined thickness is small and the amount of the monomer is too large, the minute portion obtained by the monomer polymerization becomes too large. The surrounding range is 0.
The amount of the polymer having a predetermined thickness, the thickness, etc. are adjusted so as to be about 02 to 0.2 mm 2 . In addition to an ordinary lens in which the front surface and the rear surface of the lens are spherical, the difference in refracting power in the distance or near, and the addition power can be changed by making the front surface or the rear surface of the lens aspherical.
Furthermore, bifocal toric contact lenses can be made by using the conventional toric lens processing method.
【００１１】レンズ材料としては特に制限されるもので
はなく、コンタクトレンズに用いられる材料、例えばメ
タクリレート類、シロキサニルメタクリレート類、ポリ
シロキサニルメタクリレート類、フルオロメタクリレー
ト類、ヒドロキシメタクリレート類のポリマー或いはコ
ポリマー、更にはポリスチレン、ポリブロモフェニルメ
タクリレート、ポリサルホンのように屈折率の高いポリ
マー或いはコポリマーそしてフッ素含有ポリマーのよう
に屈折率の低いポリマーなどを用いることができる。上
述の製法（ｂ）におけるモノマーとしては、これらのモ
ノマーを用いればよい。The lens material is not particularly limited, and materials used for contact lenses, for example, polymers or copolymers of methacrylates, siloxanyl methacrylates, polysiloxanyl methacrylates, fluoromethacrylates and hydroxymethacrylates. Furthermore, polymers or copolymers having a high refractive index such as polystyrene, polybromophenyl methacrylate, and polysulfone, and polymers having a low refractive index such as a fluorine-containing polymer can be used. These monomers may be used as the monomer in the above-mentioned production method (b).
【００１２】[0012]
【実施例】以下に本発明の実施例を示し、本発明を更に
具体的に説明するが、本発明はこれらによって何等限定
されるものではない。The present invention will be described in more detail below with reference to examples of the present invention, but the present invention is not limited to these.
【００１３】[0013]
【実施例１】直径０．４mm（面積０．１３mm2 ）のファ
イバー状のポリスチレン（屈折率＝１．５９）と屈折率
が１．４３であるシロキサニルメタクリレート、フルオ
ロメタクリレート、並びにメタアクリル酸からなるコポ
リマーを束ねて熱圧縮し、図１に示す切断面を有するロ
ッドを作成する。このロッドを切削、研磨することによ
り得られるサイズ８．８mm、ベースカーブ７．７ｍm 、
フロントカーブ８．３mm、中心厚み０．１５mmのコンタ
クトレンズは−５．１Ｄ（デイオプター）と−３．７Ｄ
という二つの屈折力を有する遠近両用レンズである。Example 1 Fibrous polystyrene having a diameter of 0.4 mm (area 0.13 mm 2 ) (refractive index = 1.59) and siloxanyl methacrylate, fluoromethacrylate, and methacrylic acid having a refractive index of 1.43. The resulting copolymer is bundled and heat-compressed to prepare a rod having a cut surface shown in FIG. The size obtained by cutting and polishing this rod is 8.8 mm, the base curve is 7.7 mm,
Contact lenses with a front curve of 8.3mm and a center thickness of 0.15mm are -5.1D (dayopter) and -3.7D.
It is a bifocal lens having two refractive powers.
【００１４】[0014]
【発明の効果】本発明によるコンタクトレンズを用いる
ことにより、レンズ処方、フィッティングを比較的容易
に、遠景、近景共に良い矯正視力が得られる。By using the contact lens according to the present invention, it is possible to relatively easily perform lens prescription and fitting, and obtain good corrected visual acuity in both the distant view and the near view.
【図１】実施例１で得られるロッドの切断面を示す模式
図。FIG. 1 is a schematic view showing a cut surface of a rod obtained in Example 1.
【図２】製法（ｂ）で得られるロッドの切断面を示す模
式図。FIG. 2 is a schematic diagram showing a cut surface of a rod obtained by the manufacturing method (b).
１ 屈折率１．５９の部分 ２ 屈折率１．４３の部分 ３ 微小部分 ４ 微小部分 1 Part with a refractive index of 1.59 2 Part with a refractive index of 1.43 3 Small part 4 Small part
Claims (1)
されてなるマルチフォーカルコンタクトレンズ。1. A multifocal contact lens comprising minute portions having different refractive indexes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4120663A JPH05313107A (en) | 1992-05-13 | 1992-05-13 | Multifocal contact lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4120663A JPH05313107A (en) | 1992-05-13 | 1992-05-13 | Multifocal contact lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05313107A true JPH05313107A (en) | 1993-11-26 |
Family
ID=14791825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4120663A Withdrawn JPH05313107A (en) | 1992-05-13 | 1992-05-13 | Multifocal contact lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05313107A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011510798A (en) * | 2008-02-05 | 2011-04-07 | レーザー エナジェティックス，インコーポレイテッド | Compound microlens implant |
| EP3273292A1 (en) * | 2016-07-19 | 2018-01-24 | Carl Zeiss Vision International GmbH | Spectacle glass and method for its production |
| EP3311993A1 (en) * | 2016-10-20 | 2018-04-25 | Carl Zeiss Vision International GmbH | Spectacle glass and method for its production |
| CN110320677A (en) * | 2019-08-02 | 2019-10-11 | 上海伟星光学有限公司 | A kind of two-sided compound new excellent manufacturing method for learning polyurethane eyeglass |
| CN110471195A (en) * | 2018-05-10 | 2019-11-19 | 安世亚太科技股份有限公司 | The integrated glasses of a kind of long sight, myopia and its manufacturing method |
-
1992
- 1992-05-13 JP JP4120663A patent/JPH05313107A/en not_active Withdrawn
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011510798A (en) * | 2008-02-05 | 2011-04-07 | レーザー エナジェティックス，インコーポレイテッド | Compound microlens implant |
| US10845619B2 (en) | 2016-07-19 | 2020-11-24 | Carl Zeiss Vision International Gmbh | Spectacle lens and method for producing a spectacle lens |
| US11633928B2 (en) | 2016-07-19 | 2023-04-25 | Carl Zeiss Vision International Gmbh | Spectacle lens and method for producing a spectacle lens |
| JP2019521397A (en) * | 2016-07-19 | 2019-07-25 | カール ツァイス ヴィジョン インターナショナル ゲーエムベーハー | Eyeglass lens and method of manufacturing the same |
| KR20190025724A (en) * | 2016-07-19 | 2019-03-11 | 칼 자이스 비전 인터내셔널 게엠베하 | Glasses lens and method for making same |
| CN109690391A (en) * | 2016-07-19 | 2019-04-26 | 卡尔蔡司光学国际有限公司 | Eyeglass and its production method |
| EP3492964A1 (en) | 2016-07-19 | 2019-06-05 | Carl Zeiss Vision International GmbH | Spectacle glass and method for its production |
| EP3499297A1 (en) | 2016-07-19 | 2019-06-19 | Carl Zeiss Vision International GmbH | Spectacle glass and method for its production |
| CN110031984A (en) * | 2016-07-19 | 2019-07-19 | 卡尔蔡司光学国际有限公司 | Eyeglass and its production method |
| CN111443502B (en) * | 2016-07-19 | 2022-07-26 | 卡尔蔡司光学国际有限公司 | Spectacle lens and method for producing the same |
| WO2018015442A1 (en) | 2016-07-19 | 2018-01-25 | Carl Zeiss Vision International Gmbh | Spectacle lens and method for producing same |
| CN111443502A (en) * | 2016-07-19 | 2020-07-24 | 卡尔蔡司光学国际有限公司 | Spectacle lens and method for producing the same |
| CN111443503B (en) * | 2016-07-19 | 2022-07-15 | 卡尔蔡司光学国际有限公司 | Spectacle lens and method for producing the same |
| CN111443503A (en) * | 2016-07-19 | 2020-07-24 | 卡尔蔡司光学国际有限公司 | Spectacle lens and method for producing the same |
| CN111443501A (en) * | 2016-07-19 | 2020-07-24 | 卡尔蔡司光学国际有限公司 | Spectacle lens and method for producing the same |
| EP3273292A1 (en) * | 2016-07-19 | 2018-01-24 | Carl Zeiss Vision International GmbH | Spectacle glass and method for its production |
| US11175517B2 (en) | 2016-07-19 | 2021-11-16 | Carl Zeiss Vision International Gmbh | Spectacle lens and method for producing a spectacle lens |
| EP3311993A1 (en) * | 2016-10-20 | 2018-04-25 | Carl Zeiss Vision International GmbH | Spectacle glass and method for its production |
| CN110471195A (en) * | 2018-05-10 | 2019-11-19 | 安世亚太科技股份有限公司 | The integrated glasses of a kind of long sight, myopia and its manufacturing method |
| CN110320677A (en) * | 2019-08-02 | 2019-10-11 | 上海伟星光学有限公司 | A kind of two-sided compound new excellent manufacturing method for learning polyurethane eyeglass |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990803 |