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JP2013109102A - Contact lens - Google Patents

Contact lens
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Publication number
JP2013109102A
JP2013109102AJP2011253083AJP2011253083AJP2013109102AJP 2013109102 AJP2013109102 AJP 2013109102AJP 2011253083 AJP2011253083 AJP 2011253083AJP 2011253083 AJP2011253083 AJP 2011253083AJP 2013109102 AJP2013109102 AJP 2013109102A
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Prior art keywords
contact lens
environment
light
ring
light transmittance
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JP2011253083A
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Japanese (ja)
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Teruyuki Seto
輝幸 瀬戸
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Abstract

PROBLEM TO BE SOLVED: To provide a contact lens which allows the focal depth to be improved due to pinhole effect in a bright environment, and achieves sufficient natural lighting in a dark environment so that the field of view is not interrupted.SOLUTION: A contact lens includes a ring-shaped photochromic part at the center of which light transmittance gradually varies in response to the brightness of a peripheral environment. The light transmittance of the ring-shaped photochromic part decreases in a bright environment and increases in a dark environment.

Description

Translated fromJapanese

この発明は、ピンホール効果により眼の焦点深度を改善するとともに、周辺環境の明るさに応じて眼に入射する光量を調整することが可能なコンタクトレンズに関するものである。  The present invention relates to a contact lens capable of improving the depth of focus of an eye by a pinhole effect and adjusting the amount of light incident on the eye according to the brightness of the surrounding environment.

眼が受光した光は、角膜や水晶体を通過する際に屈折し、網膜上で焦点を結ぶことにより、鮮明な像として脳に認識される。  The light received by the eye is refracted when passing through the cornea and the crystalline lens, and is recognized by the brain as a clear image by focusing on the retina.

しかしながら、屈折異常等により受光した光を網膜上で正しく結像させることができなくなると、脳が認識する像がぼやけてしまい、いわゆる近視や遠視の状態となる。  However, if the light received due to refractive error or the like cannot be correctly imaged on the retina, the image recognized by the brain is blurred, resulting in so-called myopia or hyperopia.

従来、このような近視や遠視を矯正するために、メガネやコンタクトレンズが用いられている。メガネやコンタクトレンズは、レンズの働きにより、受光した光が網膜上で結像できるように調整するものである。  Conventionally, glasses and contact lenses are used to correct such myopia and hyperopia. The glasses and the contact lens are adjusted so that the received light can be imaged on the retina by the function of the lens.

また、他の視力矯正手段として、ピンホール効果を利用したコンタクトレンズが提案されている。このようなピンホール効果を利用したコンタクトレンズは、レンズ中央にピンホールを形成して眼に入射する光量を絞ることにより、光の焦点深度を広くし、光が網膜上で結像し易くするものである。  As another visual acuity correcting means, a contact lens using a pinhole effect has been proposed. A contact lens using such a pinhole effect forms a pinhole in the center of the lens to reduce the amount of light incident on the eye, thereby widening the focal depth of light and facilitating image formation on the retina. Is.

例えば、図4に示すような近視の眼の場合、眼に入射して角膜150や水晶体151で屈折する光Lの焦点深度F1が網膜152上に位置しないため、ぼやけた像として脳に認識される。  For example, in the case of a myopic eye as shown in FIG. 4, the focal depth F1 of the light L that is incident on the eye and refracted by thecornea 150 or thecrystalline lens 151 is not positioned on theretina 152, so that it is recognized by the brain as a blurred image. The

そこで、特許文献1においては、図5に示すように、光を透過しないリング状の非透光部102を設け、光が透過可能な範囲を中央の光透過部103のみに制限したコンタクトレンズ101が提案されている。このようなコンタクトレンズ101を眼に装着することにより、光Lの焦点深度F2を広げて網膜152上に位置させることを可能としている。その結果、脳はより鮮明な像を認識することが可能となる。この時、光透過部103がピンホールとして機能している。  Therefore, inPatent Document 1, as shown in FIG. 5, acontact lens 101 in which a ring-shaped non-light-transmittingportion 102 that does not transmit light is provided and a range in which light can be transmitted is limited to only the centrallight transmitting portion 103. Has been proposed. By wearing such acontact lens 101 on the eye, the focal depth F2 of the light L can be expanded and positioned on theretina 152. As a result, the brain can recognize a clearer image. At this time, thelight transmission part 103 functions as a pinhole.

実用新案登録第3168294号Utility model registration No. 3168294

しかしながら、このようなピンホールを設けたコンタクトレンズは、明るい環境で使用する場合は問題無いが、瞳孔が開くような暗い環境で使用した場合、本来は眼に入るべき光も非透光部によって遮られるため、必然的に視界が暗くなってしまう。  However, such a contact lens provided with a pinhole is not a problem when used in a bright environment, but when used in a dark environment where the pupil is open, the light that should enter the eye is also due to the non-translucent part. Because it is blocked, the field of view is inevitably darkened.

暗い環境でも十分な光量がピンホールを通過できるようにするためにはピンホールの直径を大きくする必要があるが、その場合、ピンホールによる焦点深度の改善効果が損なわれてしまう。  In order to allow a sufficient amount of light to pass through the pinhole even in a dark environment, it is necessary to increase the diameter of the pinhole. In this case, the effect of improving the depth of focus by the pinhole is impaired.

そこで本発明は、明るい環境においてはピンホール効果により焦点深度を改善できるとともに、暗い環境においては十分に採光可能として視界を遮らないコンタクトレンズを提供することにある。  SUMMARY OF THE INVENTION The present invention provides a contact lens that can improve the depth of focus by the pinhole effect in a bright environment, and that can sufficiently illuminate in a dark environment and does not block the field of view.

本発明に係るコンタクトレンズは、周辺環境の明るさに応じて光透過率が次第に変化するリング状調光部を中央部に有し、リング状調光部は、明るい環境において光透過率が低くなり、暗い環境において光透過率が高くなることとした。  The contact lens according to the present invention has a ring-shaped light control portion whose light transmittance gradually changes according to the brightness of the surrounding environment at the center, and the ring-shaped light control portion has a low light transmittance in a bright environment. Thus, the light transmittance is increased in a dark environment.

請求項1の発明によれば、周辺環境の明るさに応じて光透過率が次第に変化するリング状調光部を中央部に有し、リング状調光部は、明るい環境において光透過率が低くなり、暗い環境において光透過率が高くなることとしたことにより、明るい環境においてはピンホール効果により眼の焦点深度を改善できるとともに、暗い環境においては十分に採光可能として視界が暗くならないコンタクトレンズを提供することができる。  According to the first aspect of the present invention, the ring-shaped dimming portion whose light transmittance gradually changes according to the brightness of the surrounding environment is provided in the central portion, and the ring-shaped dimming portion has a light transmittance in a bright environment. The contact lens that reduces the depth of focus of the eye by the pinhole effect in a bright environment and can be well-lighted in a dark environment so that the field of view is not darkened. Can be provided.

本発明に係るコンタクトレンズの正面図である。1 is a front view of a contact lens according to the present invention.本発明に係るコンタクトレンズの明るい環境における使用状態を示した説明図である。It is explanatory drawing which showed the use condition in the bright environment of the contact lens which concerns on this invention.本発明に係るコンタクトレンズの暗い環境における使用状態を示した説明図である。It is explanatory drawing which showed the use condition in the dark environment of the contact lens which concerns on this invention.近視の眼における焦点深度を示した説明図である。It is explanatory drawing which showed the depth of focus in a myopic eye.ピンホール効果を有する従来のコンタクトレンズによる焦点深度の変化を示した説明図である。It is explanatory drawing which showed the change of the focal depth by the conventional contact lens which has a pinhole effect.

この発明の実施例について、図面に基づいて詳細に説明する。  Embodiments of the present invention will be described in detail with reference to the drawings.

本発明によるコンタクトレンズ1は正面視円形の略ドーム形の形状をしており、図1に示すように、透光性の外周部2と、透光性の円形中央部3と、外周部2と円形中央部3との間に形成したリング状調光部4とを有している。  Thecontact lens 1 according to the present invention has a substantially dome shape with a circular shape when viewed from the front. As shown in FIG. 1, the translucent outerperipheral portion 2, the translucent circularcentral portion 3, and the outerperipheral portion 2. And a ring-shapedlight control portion 4 formed between the circularcentral portion 3.

リング状調光部4は、周辺環境の明るさに応じて光透過率が変化する調光可能な性質を有している。具体的には、リング状調光部4は、明るい環境において光透過率が低くなり光の透過を遮るとともに、暗い環境において光透過率が高くなり光を透過可能とする性質を有している。  The ring-shapedlight control unit 4 has a dimmable property in which the light transmittance changes according to the brightness of the surrounding environment. Specifically, the ring-shapedlight control unit 4 has a property that the light transmittance is low in a bright environment to block light transmission, and the light transmittance is high in a dark environment so that light can be transmitted. .

本発明においては、例えば、光感受性のフォトクロミック化合物やハロゲン化銀等を、コンタクトレンズの素材自体に含ませたり、あるいは、コンタクトレンズの表面にコーティングすることにより、リング状調光部4を調光可能とすることができる。  In the present invention, for example, a light-sensitive photochromic compound, silver halide or the like is included in the contact lens material itself or coated on the surface of the contact lens, thereby dimming the ring-shapedlight control unit 4. Can be possible.

円形中央部3の直径は、良好なピンホール効果を得るためにできるだけ小さくすることが望ましいが、少なくとも、視野が暗くなり過ぎない程度の十分な光量が眼に入射可能な大きさとすることが望ましい。  The diameter of the circularcentral portion 3 is desirably as small as possible in order to obtain a good pinhole effect, but it is desirable that at least a sufficient amount of light that does not make the field of view too dark be incident on the eye. .

リング状調光部4の外周の直径は、暗い環境における瞳孔の直径よりも大きく形成することにより、良好なピンホール効果を得ることができる。  A good pinhole effect can be obtained by forming the diameter of the outer periphery of the ring-shapedlight control portion 4 larger than the diameter of the pupil in a dark environment.

なお、本発明によるコンタクトレンズ1は、従来のコンタクトレンズのようにレンズ状に形成してもよいし、明るい環境においてピンホール効果を得ることのみを目的としてレンズ状に形成しなくても良い。  Thecontact lens 1 according to the present invention may be formed in a lens shape like a conventional contact lens, or may not be formed in a lens shape only for the purpose of obtaining a pinhole effect in a bright environment.

図2および図3は、本発明によるコンタクトレンズ1を装着した眼を示した説明図である。  2 and 3 are explanatory views showing an eye wearing thecontact lens 1 according to the present invention.

周辺環境が明るい場合はリング状調光部4の光透過率が低くなり、図2に示すように、瞳孔153に入射する光Lは円形中央部3を通過するものに制限される。その結果、光の焦点深度が広くなるため、網膜152上で焦点を結びやすくなり、視界が鮮明となる。  When the surrounding environment is bright, the light transmittance of the ring-shapedlight control unit 4 is low, and the light L incident on thepupil 153 is limited to that passing through the circularcentral part 3 as shown in FIG. As a result, since the depth of focus of light becomes wide, it becomes easy to focus on theretina 152, and the field of view becomes clear.

周辺環境が暗くなるにつれ、図3に示すように、リング状調光部4の光透過率は次第に上昇するとともに、瞳孔153は開いた状態となる。その結果、暗い環境においても十分な光量が瞳孔153を通して入射可能となり、視界が暗くなることを防止することができる。  As the surrounding environment becomes dark, as shown in FIG. 3, the light transmittance of the ring-shapedlight control unit 4 gradually increases and thepupil 153 is opened. As a result, a sufficient amount of light can be incident through thepupil 153 even in a dark environment, and the field of view can be prevented from becoming dark.

1 コンタクトレンズ
2 外周部
3 円形中央部
4 リング状調光部
F1、F2 焦点深度
DESCRIPTION OFSYMBOLS 1Contact lens 2 Outerperipheral part 3Circular center part 4 Ring-shaped light control part F1, F2 Depth of focus

Claims (1)

Translated fromJapanese
周辺環境の明るさに応じて光透過率が次第に変化するリング状調光部を中央部に有し、当該リング状調光部は、明るい環境において光透過率が低くなり、暗い環境において光透過率が高くなることを特徴とするコンタクトレンズ。  It has a ring-shaped dimming part whose light transmittance gradually changes according to the brightness of the surrounding environment. The ring-shaped dimming part has a low light transmittance in a bright environment and transmits light in a dark environment. A contact lens characterized by a high rate.
JP2011253083A2011-11-182011-11-18Contact lensPendingJP2013109102A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2016051182A (en)*2014-08-292016-04-11ジョンソン・アンド・ジョンソン・ビジョン・ケア・インコーポレイテッドJohnson & Johnson Vision Care, Inc. Mask lens design and method for preventing and / or delaying myopia progression
CN111971612A (en)*2018-04-102020-11-20高丽眼技术株式会社Contact lens for improving presbyopia worn by one eye

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WO2011053633A1 (en)*2009-10-272011-05-05Agency For Science, Technology And ResearchFast-response photochromic nanostructured contact lenses
JP3168294U (en)*2011-01-072011-06-09友健 森永 Pinhole contact lens
WO2011130139A1 (en)*2010-04-132011-10-20Johnson & Johnson Vision Care, Inc.Pupil-only photochromic contact lenses displaying desirable optics and comfort

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* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JPH09502542A (en)*1993-09-131997-03-11ピルキントン バーンズ ハインド インコーポレイテッド Annular mask contact lens
JP2006503338A (en)*2002-12-102006-01-26トランジションズ オプティカル, インコーポレイテッド Photochromic contact lens and manufacturing method
WO2004068215A1 (en)*2003-01-272004-08-12Menicon Co., Ltd.Photochromic contact lens excelling in decoloring characteristic
WO2007057734A2 (en)*2005-10-262007-05-24Guerrieri, RobertoPhotochromatic pinhole contact lenses
US20080151183A1 (en)*2006-12-222008-06-26Altmann Griffith EOphthalmic lens including photochromic material
JP2010104772A (en)*2008-09-302010-05-13Yoichi MikawaIntraocular lens
WO2011020078A1 (en)*2009-08-132011-02-17Acufocus, Inc.Masked intraocular implants and lenses
WO2011048953A1 (en)*2009-10-202011-04-28ユニバーサルビジョン株式会社Soft contact lens
WO2011053633A1 (en)*2009-10-272011-05-05Agency For Science, Technology And ResearchFast-response photochromic nanostructured contact lenses
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WO2011130139A1 (en)*2010-04-132011-10-20Johnson & Johnson Vision Care, Inc.Pupil-only photochromic contact lenses displaying desirable optics and comfort
JP3168294U (en)*2011-01-072011-06-09友健 森永 Pinhole contact lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
JP2016051182A (en)*2014-08-292016-04-11ジョンソン・アンド・ジョンソン・ビジョン・ケア・インコーポレイテッドJohnson & Johnson Vision Care, Inc. Mask lens design and method for preventing and / or delaying myopia progression
CN111971612A (en)*2018-04-102020-11-20高丽眼技术株式会社Contact lens for improving presbyopia worn by one eye

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