CN1011117B - 折反射眼内透镜 - Google Patents

折反射眼内透镜

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Publication number
CN1011117B
CN1011117B CN87101943A CN87101943A CN1011117B CN 1011117 B CN1011117 B CN 1011117B CN 87101943 A CN87101943 A CN 87101943A CN 87101943 A CN87101943 A CN 87101943A CN 1011117 B CN1011117 B CN 1011117B
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China
Prior art keywords
lens
reflector
towards
optical bodies
amplification
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Expired
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CN87101943A
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English (en)
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CN87101943A (zh
Inventor
弗拉迪米尔·波尔特诺伊
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Allergan Inc
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Allergan Inc
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Application filed by Allergan Inc filed Critical Allergan Inc
Publication of CN87101943A publication Critical patent/CN87101943A/zh
Publication of CN1011117B publication Critical patent/CN1011117B/zh
Expired legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/14Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • A61F2/16Intraocular lenses
    • A61F2/1613Intraocular lenses having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having aberration corrections, diffractive lenses, lenses for variably absorbing electromagnetic radiation, lenses having variable focus
    • A61F2/1648Multipart lenses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/14Eye parts, e.g. lenses, corneal implants; Implanting instruments specially adapted therefor; Artificial eyes
    • A61F2/16Intraocular lenses
    • A61F2002/16965Lens includes ultraviolet absorber
    • A61F2002/1699Additional features not otherwise provided for

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  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

在将一个有内反射表面(这些内反射表面构成一种格雷果里型或卡塞格伦型的折叠望远镜)的透镜植入眼内的治疗黄斑变性症中,可在获得实质性的放大的同时保留宽的视场。

Description

本发明涉及眼内透镜,更详细地说,本发明涉及在眼内植入折反射透镜以恢复黄斑变性的视觉。
通称为黄斑变性的视网膜疾病是由于病人眼中的中央视网膜部分的缺陷而使患者眼中缺乏中央视觉。为了给病人在一定程度上恢复有用的视觉,必需极大地放大病人注视的物体。这种要求在某种程度上可用眼镜、放大镜或望远镜来达到,但存在几个问题。
为了有足够的放大率(高达+20D),眼镜必须有相当高的放倍数。眼镜放大镜方面的问题是:1)工作距离短(对于3X放大率,只有8.3厘米);和2)重量和配戴眼镜与眼睛间的间隔必须精确。放大镜具有一个很受限制的视野(一个5厘米直径的3X放大镜有约3厘米的视场)。放大镜的工作距离也短,而且使用不便。望远镜用在观察远距离的物体,必然要有一个长的工作距离。它们必须是轻重量的,且具有一个很受限制的视野(作为和舒适视觉所要求的为30°的最小视场角比较在2X放大时小于20°,而在高倍放大时,下降到4°)。Koester,C.J.和Donn.A.在国际专利第W083/01566号中公开了一种望远镜系统作为高倍放大率的放大镜(高达30D)和高倍眼内负透镜(降至-100D)的继续发展。这种组合,理论上可以给出在2.5X时较高的高达30°的视场,但它和眼镜放大镜相似,也受到眼镜片的限制。这种配置对高倍放大率眼镜是不方便的,而在配戴时(+30D时,眼镜至眼睛的距离变化必须保持在1毫米之内)限制性就更加多。
本发明通过在增加视场的同时消除配戴问题并在放大率的变化方面 提供改进的灵活性而克服上述不足之处。通过提供一个带有装入式且能产生长焦距的折叠式望远镜效果的反射表面的眼内单透镜,可以取得没有严重视场限制的远距离放大。折反射透镜的眼内位置非常接近天然透镜位置,从而可借助任何一种光学器具并在已知放大倍数下得到最大的视场。
本发明的最佳实施例打算采用一种3X放大率的透镜,这种透镜能有一个约为三分之一数量的未经放大的视场,而且视场角至少为40度。这种折反射透镜解决了存在于眼镜放大镜和手持放大镜中的短工作距离近视力(阅读放大)的问题。它也给出大得多的视场。
本发明的折反射透镜在放大率的变化方面具灵活性且不会损及质量。附加的放大率可以采用眼镜来取得以使其总的放大率与显微镜(8X放大率)的相似,同时也能保持实用的视场和工作距离。透镜的实际构型会随眼睛的特殊结构、所需的放大率以及病人是否也戴眼镜而变化。
因此,本发明的目的是要采用一或多个固体眼内元件,通过一个构成双镜折叠式远镜系统的折反射眼内透镜来产生具最大视觉场和扩大了的近视力工作距离的放大率。在下列实例中,将只叙述单片式系统。
图1a是说明本发明透镜在眼前房的安放部位的示意图;
图1b是本发明透镜在眼后房的安放位置的示意图;以及
图2a至2g是单片式折反射眼内透镜其它可能的形式,这些透镜可以用在本发明。
图1a示出的眼内透镜包括一个植入一只眼12的眼前房11内的透镜或光学体(optic    body),如像对晶体(phakic)病人或无晶体(aphakic)病人所作的治疗那样将之植入眼内。(为简明起见,在图1a中略去了晶体病人的眼珠水晶体。)透镜10在眼12内可用适宜的固定装置或触觉13支承。
从物体16来的光受到角膜18某种程度的折射,然后在透镜10内被一 环状反射表面或一般为面向前的反射体20所反射。被反射的光然后又投射到一圆形反射表面或投射到一般为位于透镜10前部中心处的面向后的反射体22上。表面22将光反射回到眼网膜14,在该处光被会聚以形成放大了的像。透镜10里的双镜组合提供了一种能产生折叠式望远镜效果的光学体,使其中的入射角α减至最小以提供最大的放大率。
由于折叠式望远镜的效果是在眼睛本身内建立的,由本发明透镜所产生的视场实质上大于由外部的放大所产生的视场,并为附加外部放大留下余量以使整个放大率增加。透镜10可以由一般用于眼内透镜光学的医用级塑料,例如聚甲基丙烯酸甲酯(PMMA)制得。反射表面20、22可以由铂、银、铝或其他适用的反射光的材料(它们在制造时用常规方法嵌入透镜10内)的薄层组成。
图1b示出植入眼睛12眼后房15的透镜10,就像对无晶体病眼内所做的手术那样将之植入眼内。图2a至2g展示各种结合有一个双镜折叠式望远镜系统在内的其它透镜构型,这种望远镜系统可以用来代替图1a和1b中所示的优选的凸凹卡塞格伦型实施例。图2a至2d分别说明双凸、凹凸、凸凹和双凹透镜体,其反射表面构成一个格雷果里形的折叠望远镜。如图2a至2d所示,环形的反射表面是凹形的,而圆形的反射表面也是凹形的。如图1a和1b所示,环形的反射表面20是凹形的,但圆形的反射表面22是凸形的。图2e至2g的相应反射镜面形状相似,图2e至2g分别说明双凸、凹凸和双凹透镜体,其反射表面构成卡塞格伦形的折叠望远镜系统。

Claims (12)

1、一种植入眼内用的眼内透镜,它包括:
一个有前和后表面的光学体;以及
用以在眼内固定光学体的固定装置,
其特征在于:
一个由所说光学体携带的一般是面向前的反射体;以及
一个由所说光学体携带的一般是面向后的反射体,所说反射体被置于所说光学体里,使得来自一个物体通过前表面并投射到面向前的反射体的光,从面向前反射体反射到所说面向后的反射体,并从所说面向后的反射体反射穿过所说后表面。
2、如权利要求1中所规定的一个透镜,其特征在于该面向前的反射体是凹形的。
3、如权利要求1或2中行规定的一个透镜,其特征在于该面向前的反射体是环形的。
4、如权利要求1或2中所规定的一个透镜,其特征在于该面向后的反射体是圆的。
5、如权利要求1或2中所规定的一个透镜,其特征在于所说反射体位于光学体之内。
6、如权利要求1或2中所规定的一个透镜,其特征在于,所说面向前和面向后的反射体分别邻近后表面和前表面。
7、如权利要求1或2中所规定的一个透镜,其特征在于,所说光学体是凸凹形的。
8、如权利要求1或2中所规定的一个透镜,其特征在于,所说光学体是双凸形的。
9、如权利要求1或2中所规定的一个透镜,其特征在于,所说光学体是凹凸形的。
10、如权利要求1或2中所规定的一个透镜,其特征在于,所说光学体是双凹形的。
11、如权利要求1或2中所规定的一个透镜,其特征在于,其中面向前的反射体是环形的,而面向后的反射体是圆的。
12、如权利要求11中所规定的一个透镜,其特征在于,其中的反射体都在光学体内。
CN87101943A 1986-03-13 1987-03-12 折反射眼内透镜 Expired CN1011117B (zh)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US83943086A 1986-03-13 1986-03-13
US839,430 1986-03-13
US926,867 1986-11-03
US06/926,867 US4759761A (en) 1986-03-13 1986-11-03 Catadioptric intraocular lens

Publications (2)

Publication Number Publication Date
CN87101943A CN87101943A (zh) 1987-09-23
CN1011117B true CN1011117B (zh) 1991-01-09

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US (1) US4759761A (zh)
EP (1) EP0242043B1 (zh)
JP (1) JPH0824687B2 (zh)
CN (1) CN1011117B (zh)
AU (1) AU587688B2 (zh)
BR (1) BR8701151A (zh)
CA (1) CA1280922C (zh)
DE (1) DE3763882D1 (zh)
IL (1) IL81783A0 (zh)

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CA1280922C (en) 1991-03-05
JPH0824687B2 (ja) 1996-03-13
BR8701151A (pt) 1988-01-12
CN87101943A (zh) 1987-09-23
EP0242043A1 (en) 1987-10-21
IL81783A0 (en) 1987-10-20
JPS62221345A (ja) 1987-09-29
AU587688B2 (en) 1989-08-24
AU6989987A (en) 1987-09-17
DE3763882D1 (de) 1990-08-30
EP0242043B1 (en) 1990-07-25
US4759761A (en) 1988-07-26

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