JPS60113208A - Contact lens - Google Patents
Contact lensInfo
- Publication number
- JPS60113208A JPS60113208A JP22173783A JP22173783A JPS60113208A JP S60113208 A JPS60113208 A JP S60113208A JP 22173783 A JP22173783 A JP 22173783A JP 22173783 A JP22173783 A JP 22173783A JP S60113208 A JPS60113208 A JP S60113208A
- Authority
- JP
- Japan
- Prior art keywords
- range
- contact lens
- range part
- curvature
- radius
- 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
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
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はコンタクトレンズに関し、さらに詳しくは非含
水性軟性材料からなる装用性に優れたソフトコンタクト
レンズに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contact lens, and more particularly to a soft contact lens made of a water-free soft material and having excellent wearability.
従来、ポリメチルメタクリレートからなる非含水性ハー
ドコンタクトレンズ、ポリヒドロキシエチルメタクリレ
ートまたはポリビニルピロ’Ｊ Ｆンからなる含水性ソ
フトコンタクトレンズおよびシリコーンゴムからなる非
含水性ソフトコンタクトレンズが知られている。BACKGROUND ART Hitherto, non-hydroscopic hard contact lenses made of polymethyl methacrylate, hydrous soft contact lenses made of polyhydroxyethyl methacrylate or polyvinyl pyro'JF, and non-hydroscopic soft contact lenses made of silicone rubber have been known.
これらのコンタクトレンズにおいて、非含水性ハードコ
ンタクトレンズは、規格形状が安定し取扱いが容易であ
るが、装用感に劣り装用に慣れるまでに長時間を要する
という欠点がある。Among these contact lenses, non-water-containing hard contact lenses have a stable standard shape and are easy to handle, but have the disadvantage that they are inferior in comfort and require a long time to get used to wearing them.
また含水性ソフトコンタクトレンズは、装用感に優れる
が、高台水性であるために、含水率の変動により、コン
タクトレンズの規格形状が変化しやすく、またコンタク
トレンズ内部が細菌によって汚染され易いために、煮沸
消毒や薬液消毒が必要であり、また洗浄液や点眼薬がレ
ンズ内部に残存し、眼を刺激する等の欠点があった。In addition, water-containing soft contact lenses are comfortable to wear, but because they are water-based, the standard shape of the contact lens tends to change due to fluctuations in water content, and the inside of the contact lens is easily contaminated by bacteria. Disinfection by boiling or chemical disinfection is required, and cleaning solutions and eye drops remain inside the lens, irritating the eyes.
−非含水性ソフトコンタクトレンズは、規格形状が安定
し、取扱いが容易であるという特徴を有し、かつ軟性材
料からなることによって含水性ソフトコンタクトレンズ
と同様に装用感に優れコンクク■・レンズとなる可能性
を持つものであるが、コンタクトレンズとしての形状が
不適当であることによって、眼球に吸着した状態となり
、眼球上での動きが悪くなる等の問題を有する。-Non-water-containing soft contact lenses have a stable standard shape and are easy to handle, and because they are made of soft materials, they are as comfortable to wear as water-containing soft contact lenses. However, due to the inappropriate shape of the contact lens, it becomes stuck to the eyeball, resulting in problems such as poor movement on the eyeball.
本発明の目的は、上記従来技術に鑑み、眼球の形状に極
力合致し、涙液の交換が円滑に行われ、装用感の極めて
優れた、非含水性軟質材料からなるコンタクトレンズを
提供することにある。In view of the above-mentioned prior art, an object of the present invention is to provide a contact lens made of a non-hydroscopic soft material that conforms to the shape of the eyeball as much as possible, allows for smooth exchange of lachrymal fluid, and is extremely comfortable to wear. It is in.
本発明は、光学範囲部、中間範囲部および外周範囲部の
３段構成からなる直径１１〜１５ｍの非含水性ソフトコ
ンタクトレンズにおいて、光学範囲部（８）の直径が７
〜１１龍、該光学範囲部の外側の中間範囲部（８Ａ）の
長さが０．２〜１．Ｏｎ、さらにその外周範囲部（１０
）の長さが０．２〜１゜０龍、中間範囲部後面（２）の
曲率半径（Ｒ２）が光学範囲部後面（１）の曲率半径（
Ｒ１）＋Ｑ。The present invention provides a water-free soft contact lens having a diameter of 11 to 15 m and consisting of a three-stage structure of an optical range part, an intermediate range part, and an outer peripheral range part, in which the diameter of the optical range part (8) is 7 m.
~11 dragon, the length of the intermediate range part (8A) outside the optical range part is 0.2 to 1. On, and further its outer range (10
) is 0.2 to 1°0 long, and the radius of curvature (R2) of the rear surface (2) of the intermediate range section is the radius of curvature (R2) of the rear surface (1) of the optical range section (
R1)+Q.
５〜同＋１．２ ｖａｎ、外周範囲部後面（３）の曲率
半径（Ｒ３）が１１〜１５郁、および外周範囲部（１０
）の周辺厚さく７）が０．１〜０．５ｍであることを特
徴とするものである。5 to +1.2 van, the radius of curvature (R3) of the rear surface (3) of the outer peripheral range is 11 to 15, and the outer peripheral range (10
) is characterized in that the peripheral thickness 7) is 0.1 to 0.5 m.
以下、本発明を図面により詳細に説明する。Hereinafter, the present invention will be explained in detail with reference to the drawings.
第１図は、本発明の一実施例を示すコンタクトレンズの
構成（中心線で切断された一方の構成）を示す部分断面
図である。このレンズは、曲率半径、厚さ等がそれぞれ
異なる光学範囲部８、中間範囲部８Ａおよび外周範囲部
１０からなり、光学範囲部８はそれぞれ曲率半径の異な
る光学範囲部後面１と同前面４の曲面を有し、中間範囲
部８Ａはそれぞれ曲率半径の異なる中間範囲部後面２と
同前面５を有し、また外周範囲部１０は曲率半径の異な
る外周範囲部後面３と同前面６を有する。FIG. 1 is a partial sectional view showing the structure (one structure cut along the center line) of a contact lens according to an embodiment of the present invention. This lens consists of an optical range part 8, an intermediate range part 8A, and an outer peripheral range part 10, which have different radii of curvature, thickness, etc., and the optical range part 8 has a rear surface 1 and a front surface 4 of the optical range part, which have different radii of curvature. The intermediate range part 8A has a curved surface, and has a rear surface 2 and a front surface 5 of the intermediate range having different radii of curvature, and the outer peripheral range 10 has a rear surface 3 and a front surface 6 of the outer peripheral range having different radii of curvature.
なお図中７は外周範囲部の厚さ、９はレンズの直径、１
１はレンズ中心部の厚さを示す。In the figure, 7 is the thickness of the outer peripheral range, 9 is the diameter of the lens, and 1
1 indicates the thickness at the center of the lens.
本発明において、光学範囲部後面１の曲率半径（Ｒ１）
は７．２〜８．４ ｍの範囲であり、これは該コンタク
トレンズを装着する個人の眼球に合わせて選択される。In the present invention, the radius of curvature (R1) of the rear surface 1 of the optical range section
ranges from 7.2 to 8.4 m, which is selected depending on the eye of the individual wearing the contact lens.
次に中間範囲部後面２の曲率半径（Ｒ２）は前記光学範
囲部後面ｌの曲率半径（Ｒ１）をもとにＲ１十０．５．
〜Ｒ１＋１．２鰭の範囲、すなわち７．７〜９．６鰭の
範囲から選択される。中間範囲部後面２の曲率半径（Ｒ
２）が小さすぎると、眼球とコンタクトレンズの間に貯
留される涙液が多くなり、このため除圧が発生して吸盤
状態となりやすく、レンズが固着し易くなる。また大き
すぎると中間範囲部が足腺から浮き上がり、空気が入り
やすく、外観上目立ち、また異物感を生じやすくなる。Next, the radius of curvature (R2) of the rear surface 2 of the intermediate range section is determined by R1 + 0.5 based on the radius of curvature (R1) of the rear surface 1 of the optical range section.
~R1+1.2 fins, i.e. 7.7 to 9.6 fins. The radius of curvature (R
If 2) is too small, a large amount of lachrymal fluid will accumulate between the eyeball and the contact lens, which will cause decompression to occur, resulting in a suction cup state, and the lens will tend to stick. If it is too large, the intermediate region will rise above the foot gland, making it easy for air to enter, making it noticeable in appearance and giving a feeling of being a foreign body.
外周範囲部後面３の曲率半径（Ｒ３）は、１１〜１５璽
１の範囲であるが、この曲率半径が小さすぎると、外周
範囲部１０の後面のカーブが内側に食い込み、このため
コンタクトレンズ全体が前方に押し出されぎみとなり、
コンタクトレンズと眼球との間に隙間ができやすくなる
。このためまばたきによって変形しやすく、また残留力
によってコンタクトレンズが眼球に吸盤のようにくつつ
き易くなる。またこの曲率半径（Ｒ３〉が大きすぎると
、掌膜とコンタクトレンズの外周部が大きく開いてしま
い、外見上好ましくなく、また浮き上がるために装用感
が悪くなる。The radius of curvature (R3) of the rear surface 3 of the outer circumferential range part is in the range of 11 to 15 squares, but if this radius of curvature is too small, the curve of the rear surface of the outer circumferential range part 10 will cut inward, and the entire contact lens will be damaged. is pushed forward and becomes a little tight,
A gap tends to form between the contact lens and the eyeball. For this reason, the contact lens tends to deform when blinking, and the residual force tends to cause the contact lens to stick to the eyeball like a suction cup. Furthermore, if the radius of curvature (R3) is too large, the palmar membrane and the outer periphery of the contact lens will be wide open, which is unfavorable in appearance, and will float, making it uncomfortable to wear.
本発明における光学範囲部８の直径は、７〜１１龍であ
るが、この直径が７■未溝の時は光学的性能、例えば視
界が狭くなったり、画像が重複して見えたりすることが
ある。また１ｉｎｅを越えると、この光学範囲部の周辺
が足腺にかかり、角膜に適合したコンタクトレンズ後面
形状が得られなくなる。The diameter of the optical range part 8 in the present invention is 7 to 11 mm, but when this diameter is 7 mm without grooves, the optical performance may be affected, such as narrowing the field of view or overlapping images. be. If it exceeds 1ine, the periphery of this optical range overlaps the foot gland, making it impossible to obtain a shape of the posterior surface of the contact lens that is compatible with the cornea.
また外周範囲部１０は０．２〜１．０ ＋ｎの長さを存
しているが、この長さが０．２ ｍｍ未満のときは、コ
ンタクトレンズ後面と掌膜との接触面が小さくなり、角
膜とコンタクトレンズとの固着が起こり易くなる。また
１、０璽璽を越えるとコンタクトレンズの周囲が角膜の
周辺に当たり、またコンタクトレンズが大きくなるため
、使いにくくなる。Further, the outer peripheral range part 10 has a length of 0.2 to 1.0 +n, but when this length is less than 0.2 mm, the contact surface between the back surface of the contact lens and the palmar membrane becomes small. , the cornea and contact lens are more likely to stick together. Moreover, if the size exceeds 1.0, the periphery of the contact lens will touch the periphery of the cornea, and the contact lens will become larger, making it difficult to use.
中間範囲部８Ａの長さは、コンタクトレンズの直径１１
〜１５ｍｍから前記光学範囲部８の直径と外周範囲部１
０の長さを差し引いたものから算出され、０．２〜１．
０鰭の範囲である。The length of the intermediate range portion 8A is the diameter of the contact lens 11
~15mm to the diameter of the optical range section 8 and the outer circumferential range section 1
It is calculated from subtracting the length of 0, and ranges from 0.2 to 1.
0 fin range.
さらに外周範囲部１０の周辺厚さ７は０．１〜０゜５Ｍ
の範囲であるが、この範囲が０． Ｉ ８未満の時は、
周辺部が過度に薄くなるため、コンタクトレンズの変形
が大きくなり、またコンタクトレンズの眼球への固着を
引き起こし易くなる。また０、５鶴を越えると、眼球を
刺激し易くなり、異物感力く大となる。なお、外周範囲
部１０の周辺厚さ７とは、中間範囲部後面（２）と外周
範囲部後面（３）の接点から外周範囲部前面６への最短
長さを示すものである。Furthermore, the peripheral thickness 7 of the outer peripheral range portion 10 is 0.1 to 0°5M.
This range is 0. When I is less than 8,
Since the peripheral portion becomes excessively thin, the contact lens becomes significantly deformed and the contact lens tends to stick to the eyeball. Moreover, if it exceeds 0.5 cranes, it becomes easy to irritate the eyeballs, and the sensitivity to foreign objects increases. The peripheral thickness 7 of the outer circumferential range part 10 indicates the shortest length from the contact point of the intermediate range part rear surface (2) and the outer circumferential range part rear surface (3) to the outer circumferential range part front surface 6.
上記コンタクトレンズの他の構成要素では、光学範囲部
前面４０曲率半径は、レンズの屈折力もこより定められ
る。また外周範囲部前面６の円弧の曲率半径は外周範囲
部１０の厚さ７を半径とする内接円とコンタクトレンズ
の端縁の曲率半径（６）により決定される。このコンタ
クトレンズの端縁の曲率半径（Ｒ−は、通常０．０３〜
０．１ｍｍである。In other components of the contact lens, the radius of curvature of the optical region front surface 40 is also determined by the refractive power of the lens. The radius of curvature of the arc of the front surface 6 of the outer circumferential range part is determined by the inscribed circle whose radius is the thickness 7 of the outer circumferential range part 10 and the radius of curvature (6) of the edge of the contact lens. The radius of curvature (R-) of the edge of this contact lens is usually 0.03 to
It is 0.1 mm.
さらに中間範囲部前面５は、光学範囲部前面４と外周範
囲部前面６の決定により自ずと決定される。Further, the intermediate range front surface 5 is naturally determined by determining the optical range front surface 4 and the outer peripheral range front surface 6.
なお、中間範囲部前面５および外周範囲部前面６は、加
工上の問題からコンタクトレンズの後面側に中心を置（
円弧となることが好ましシ゛）。Note that the intermediate range front surface 5 and the outer peripheral range front surface 6 are centered on the rear surface side of the contact lens due to processing problems.
It is preferable that it be a circular arc).
またレンズの中心厚さ１１は凹レンズの場合は０．０５
〜０．２龍の範囲であるが、凸レンズの）Ｊ％ 合には
特に限定されない。この厚さが薄すぎるとレンズのたわ
みを生じ、光学的性能が低下する。In addition, the center thickness 11 of the lens is 0.05 in the case of a concave lens.
-0.2 times, but is not particularly limited to the case of convex lenses. If this thickness is too thin, the lens will bend and the optical performance will deteriorate.
第１図に示したコンタクトレンズの光学範囲部８、レン
ズ直径９等の曲率中心は光学軸を基準にしているが、本
発明においてはこれに限定されず、光学軸以外に基準を
設けてもよい。Although the center of curvature of the optical range part 8, lens diameter 9, etc. of the contact lens shown in FIG. good.
上記構造のコンタクトレンズは、非含水性軟質素材を上
記形状に、キャスティング、切削加工等の成形手段によ
り成形することにより容易に作成することができる。A contact lens having the above structure can be easily produced by molding a non-hydrous soft material into the above shape using a molding method such as casting or cutting.
本発明に用いる非含水性軟質材料としては、ポリシロキ
サン等のシリコンゴム、および特公昭５３−３１１８９
号公報に記載された方法等で得られるブチル（メタ）ア
クリレート系重合体等を挙げることができる。Examples of non-hydrous soft materials used in the present invention include silicone rubber such as polysiloxane, and
Examples include butyl (meth)acrylate polymers obtained by the method described in the above publication.
本発明によれば、非含水性の軟質材料でソフトコンタク
トレンズを作成したことにより、従来の含水性ソフトコ
ンタクトレンズのように煮沸消毒が不要になり、またハ
ードコンタクトレンズのように装着が困難なことはなく
、装着が楽になり、またその形状は眼球の形状に極力合
致したものになるので、装用感が良く、また涙液の交換
が円滑に行われるので、角膜の障害を惹起せず、装用感
がレンズのパワーにかかわらず同等となり、かつ優れて
いるという種々の利点が得られる。According to the present invention, since the soft contact lenses are made from a non-hydroscopic soft material, there is no need for boiling sterilization like with conventional water-containing soft contact lenses, and they are difficult to wear like hard contact lenses. It is easy to wear, and its shape matches the shape of the eyeball as much as possible, so it is comfortable to wear, and the exchange of lachrymal fluid is smooth, so it does not cause corneal damage. Various advantages can be obtained in that the wearing comfort is the same and superior regardless of the power of the lens.
第１図は、本発明の一実施例を示すコンタクトレンズの
片面部分を示す断面図であり、第２図は、該コンタクト
レンズ端縁の拡大図である。
１・・・光学範囲部後面、２・・・中間範囲部後面、３
・・・外周範囲部後面、仁・・・光学範囲部前面、５・
・−・中間範囲部前面、６・・・外周範囲部前面、７・
・・外周範囲部の周辺厚さ、Ｂ・・・光学範囲部、８Ａ
・・・中間範囲部、９・・・レンズ直径、１０・・・外
周範囲部、１１・・・中心部厚さ。
代理人 弁理士 川 北 武 長
第１図
第２図FIG. 1 is a sectional view showing one side of a contact lens according to an embodiment of the present invention, and FIG. 2 is an enlarged view of the edge of the contact lens. 1... Rear surface of optical range section, 2... Rear surface of intermediate range section, 3
...Rear surface of outer circumferential range, inner surface...Front surface of optical range section, 5.
・-・Front surface of the middle range part, 6...Front surface of the outer peripheral range part, 7・
... Peripheral thickness of outer circumferential range part, B... Optical range part, 8A
. . . Middle range, 9. Lens diameter, 10. Outer periphery range, 11. Center thickness. Agent Patent Attorney Takenaga Kawakita Figure 1 Figure 2
Claims (1)
構成からなる直径１１〜１５１１ＩＩの非含水性ソフト
コンタクトレンズにおいて、光学範囲部（８）の直径が
７〜１１１ｍ、該光学範囲部の外側の中間範囲部（８Ａ
）の長さが０．２〜１． Ｏｎ＋、さらにその外周範囲
部（１０）の長さが０．２〜ｌ、 ＯＩｌｌ、中間範囲
部後面（２）の曲率半径が光学範囲部後面（１）の曲率
半径＋０．５〜同＋１．２＋ｎ、外周範囲部後面（３）
の曲率半径が１１〜ｌ 、５ ｍｍ、および外周範囲部
（１０）の周辺厚さく７）が０．１〜Ｑ、 ５ ｍ＋＊
であることを特徴とするコンタクトレンズ。(1) In a non-hydrous soft contact lens with a diameter of 11 to 1511 II consisting of a three-stage configuration of an optical range part, an intermediate range part, and an outer peripheral range part, the optical range part (8) has a diameter of 7 to 111 m; (8A
) has a length of 0.2 to 1. On+, furthermore, the length of the outer peripheral range part (10) is 0.2 to l, OIll, the radius of curvature of the rear surface of the intermediate range part (2) is +0.5 to +1. 2+n, rear surface of outer peripheral area (3)
The radius of curvature is 11~l, 5 mm, and the peripheral thickness 7) of the outer peripheral range part (10) is 0.1~Q, 5 m+*
A contact lens characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22173783A JPS60113208A (en) | 1983-11-25 | 1983-11-25 | Contact lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22173783A JPS60113208A (en) | 1983-11-25 | 1983-11-25 | Contact lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60113208A true JPS60113208A (en) | 1985-06-19 |
Family
ID=16771445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22173783A Pending JPS60113208A (en) | 1983-11-25 | 1983-11-25 | Contact lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60113208A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0329598A2 (en) * | 1988-02-18 | 1989-08-23 | BAUSCH & LOMB INCORPORATED | Flexible contact lens for enhanced movement on the eye |
| WO1994010599A1 (en) * | 1992-10-27 | 1994-05-11 | Menicon Co., Ltd. | Soft contact lens |
| WO2003087920A1 (en) * | 2002-04-12 | 2003-10-23 | Menicon Co., Ltd. | Contact lens and production method for contact lens |
| WO2006134649A1 (en) * | 2005-06-15 | 2006-12-21 | Menicon Co., Ltd. | Contact lens of various materials |
| WO2007066666A1 (en) * | 2005-12-05 | 2007-06-14 | Menicon Co., Ltd. | Soft contact lens |
-
1983
- 1983-11-25 JP JP22173783A patent/JPS60113208A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0329598A2 (en) * | 1988-02-18 | 1989-08-23 | BAUSCH & LOMB INCORPORATED | Flexible contact lens for enhanced movement on the eye |
| US4896958A (en) * | 1988-02-18 | 1990-01-30 | Ames Keith S | Flexible contact lens for enhanced movement on the eye |
| WO1994010599A1 (en) * | 1992-10-27 | 1994-05-11 | Menicon Co., Ltd. | Soft contact lens |
| US5502517A (en) * | 1992-10-27 | 1996-03-26 | Menicon Co., Ltd. | Soft contact lens with a back surface whose central and intermediate portions are formed by different ellipsoidal surfaces continuously contiguous to each other |
| WO2003087920A1 (en) * | 2002-04-12 | 2003-10-23 | Menicon Co., Ltd. | Contact lens and production method for contact lens |
| JPWO2003087920A1 (en) * | 2002-04-12 | 2005-08-25 | 株式会社メニコン | Contact lens and method of manufacturing contact lens |
| JP4500551B2 (en) * | 2002-04-12 | 2010-07-14 | 株式会社メニコン | Contact lens and method of manufacturing contact lens |
| WO2006134649A1 (en) * | 2005-06-15 | 2006-12-21 | Menicon Co., Ltd. | Contact lens of various materials |
| WO2007066666A1 (en) * | 2005-12-05 | 2007-06-14 | Menicon Co., Ltd. | Soft contact lens |
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