CN1556686A - 用于检查和量化白内障的仪器和方法 - Google Patents
用于检查和量化白内障的仪器和方法 Download PDFInfo
- Publication number
- CN1556686A CN1556686A CNA028186397A CN02818639A CN1556686A CN 1556686 A CN1556686 A CN 1556686A CN A028186397 A CNA028186397 A CN A028186397A CN 02818639 A CN02818639 A CN 02818639A CN 1556686 A CN1556686 A CN 1556686A
- Authority
- CN
- China
- Prior art keywords
- light
- eye
- optical
- retina
- image
- 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
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/117—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes
- A61B3/1173—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes for examining the eye lens
- A61B3/1176—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for examining the anterior chamber or the anterior chamber angle, e.g. gonioscopes for examining the eye lens for determining lens opacity, e.g. cataract
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Eye Examination Apparatus (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30727201P | 2001-07-23 | 2001-07-23 | |
| US60/307,272 | 2001-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1556686A true CN1556686A (zh) | 2004-12-22 |
Family
ID=23188992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA028186397A Pending CN1556686A (zh) | 2001-07-23 | 2002-07-23 | 用于检查和量化白内障的仪器和方法 |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US6834958B2 (enExample) |
| EP (1) | EP1408815A2 (enExample) |
| JP (1) | JP2004535880A (enExample) |
| KR (1) | KR20040030844A (enExample) |
| CN (1) | CN1556686A (enExample) |
| AU (1) | AU2002326439A1 (enExample) |
| WO (1) | WO2003009745A2 (enExample) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102920427A (zh) * | 2012-11-09 | 2013-02-13 | 苏州四海通仪器有限公司 | 一种睑板腺成像系统 |
| CN103228200A (zh) * | 2010-10-25 | 2013-07-31 | 史提芬·维杜纳 | 阿兹海默症、脑部创伤、黄斑变性与复数神经退化失调及眼病的诊断、预防以及预后侦测视网膜中淀粉样蛋白的装置与方法 |
| CN105615821A (zh) * | 2016-01-21 | 2016-06-01 | 吉林大学 | 一种偏光视力检测装置 |
Families Citing this family (44)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10307741A1 (de) * | 2003-02-24 | 2004-09-02 | Carl Zeiss Meditec Ag | Anordnung zur Bildfeldverbesserung bei ophthalmologischen Geräten |
| US7331672B2 (en) * | 2003-08-01 | 2008-02-19 | Visx, Incorporated | Sterile hand held refractive surgery slit lamp illumination system |
| US7338169B2 (en) * | 2003-08-01 | 2008-03-04 | Visx, Incorporated | Slit lamp for ophthalmic use |
| US7422328B2 (en) * | 2005-05-06 | 2008-09-09 | Amo Manufacturing Usa, Llc | Sterile hand held slit lamp cover and method |
| WO2007062367A2 (en) * | 2005-11-21 | 2007-05-31 | The Curators Of The University Of Missouri | Light sensitivity meter and uses thereof |
| US7467870B2 (en) * | 2006-04-27 | 2008-12-23 | Zeavision Llc | Reflectometry instrument and method for measuring macular pigment |
| KR100796355B1 (ko) | 2006-05-25 | 2008-01-21 | 양연식 | 근적외선을 이용한 세극등 검사장치 |
| US7970179B2 (en) | 2006-09-25 | 2011-06-28 | Identix Incorporated | Iris data extraction |
| ES2310136B1 (es) * | 2007-06-07 | 2009-11-05 | Consejo Superior De Investigaciones Cientificas | Metodo para la mejora automatica de imagenes y secuencias con degradacion espacialmente variante. |
| WO2008157359A2 (en) * | 2007-06-15 | 2008-12-24 | Norbert Massie | Method and apparatus for imaging an eye of a small animal |
| RU2346645C1 (ru) * | 2007-08-09 | 2009-02-20 | Федеральное государственное учреждение "Межотраслевой научно-технический комплекс "Микрохирургия глаза" имени С.Н. Федорова Федерального агентства по высокотехнологичной медицинской помощи" | Способ доклинического выявления формирования ядерной катаракты высокой степени плотности у пациентов с миопией |
| DE102007053386A1 (de) * | 2007-11-07 | 2009-05-14 | Carl Zeiss Meditec Ag | Anordnung und Verfahren zur automatischen Ermittlung einer Kataraktstärke eines Auges sowie ophthalmologisches Gerät und Steuerverfahren für ein solches |
| JP5305409B2 (ja) * | 2008-02-15 | 2013-10-02 | 国立大学法人 奈良先端科学技術大学院大学 | 白内障検査装置、白内障検査方法、および白内障判定プログラム |
| JP5607640B2 (ja) * | 2008-10-15 | 2014-10-15 | オプティブランド リミティド,リミティド ライアビリティ カンパニー | 眼の特徴の画像を得る方法と装置 |
| US8873810B2 (en) * | 2009-03-02 | 2014-10-28 | Honeywell International Inc. | Feature-based method and system for blur estimation in eye images |
| EP2635175B1 (en) | 2010-10-13 | 2015-12-09 | Ocular Prognostics LLC | Handheld reflectometer for measuring macular pigment |
| US9808155B2 (en) | 2010-10-25 | 2017-11-07 | Neurovision Imaging Llc | Apparatus to detect amyloid in a patient user's retina in a diagnosis, advancement and prognosis of alzheimer's disease, traumatic brain injury, macular degeneration and a plurality of neurodegenerative disorders and ocular diseases |
| US8639306B2 (en) | 2011-02-07 | 2014-01-28 | Brien Holden Vision Diagnostics, Inc. | Noninvasive eye-property monitoring, including aqueous-humor glucose monitoring as an indication of blood glucose level |
| WO2012112610A2 (en) * | 2011-02-15 | 2012-08-23 | Massachusetts Institute Of Technology | Methods and apparatus for cataract detection and rendering |
| WO2012118907A2 (en) | 2011-03-02 | 2012-09-07 | Quantum Catch, Llc | Ocular fundus camera system and methodology |
| US10226174B2 (en) | 2011-03-02 | 2019-03-12 | Brien Holden Vision Institute | Ocular fundus imaging systems, devices and methods |
| DE102011088039B4 (de) | 2011-12-08 | 2020-01-16 | Leica Microsystems (Schweiz) Ag | Operationsmikroskopsystem für die Ophthalmologie und zugehörige Detektionseinheit |
| DE102011088038B4 (de) | 2011-12-08 | 2019-10-10 | Leica Microsystems (Schweiz) Ag | Operationsmikroskopsystem für die Ophthalmologie und zugehörige Detektionseinheit |
| JP6143447B2 (ja) * | 2011-12-21 | 2017-06-07 | キヤノン株式会社 | 眼科装置及び眼測定方法、並びにプログラム |
| US20150021228A1 (en) | 2012-02-02 | 2015-01-22 | Visunex Medical Systems Co., Ltd. | Eye imaging apparatus and systems |
| US9655517B2 (en) * | 2012-02-02 | 2017-05-23 | Visunex Medical Systems Co. Ltd. | Portable eye imaging apparatus |
| US9351639B2 (en) | 2012-03-17 | 2016-05-31 | Visunex Medical Systems Co. Ltd. | Eye imaging apparatus with a wide field of view and related methods |
| US8876293B2 (en) | 2012-10-31 | 2014-11-04 | Zeavision, Llc | Macular pigment measurement device with data quality indexing feature |
| JP6221249B2 (ja) * | 2013-02-08 | 2017-11-01 | 株式会社ニデック | 眼屈折力測定装置 |
| CN106061367A (zh) * | 2013-09-06 | 2016-10-26 | 华柏恩视觉诊断公司 | 眼底成像系统、装置和方法 |
| US9974437B2 (en) * | 2014-05-07 | 2018-05-22 | Edwin Ryan | Device and method to quantify vitreous opacity impairment |
| US9986908B2 (en) | 2014-06-23 | 2018-06-05 | Visunex Medical Systems Co. Ltd. | Mechanical features of an eye imaging apparatus |
| JP2017526507A (ja) | 2014-08-31 | 2017-09-14 | ベレシュトカ,ジョン | 目を解析するためのシステム及び方法 |
| WO2016123138A1 (en) | 2015-01-26 | 2016-08-04 | Visunex Medical Systems Co. Ltd. | A disposable cap for an eye imaging apparatus and related methods |
| CA3053910A1 (en) | 2017-02-27 | 2018-08-30 | Zeavision, Llc | Reflectometry instrument and method for measuring macular pigment |
| JP6894648B2 (ja) * | 2019-12-18 | 2021-06-30 | 株式会社中京メディカル | 水晶体データ取得方法、眼科装置及び眼科装置用プログラム |
| US11622682B2 (en) | 2019-12-27 | 2023-04-11 | Ohio State Innovation Foundation | Methods and apparatus for making a determination about an eye using color temperature adjusted ambient lighting |
| US20210196119A1 (en) * | 2019-12-27 | 2021-07-01 | Ohio State Innovation Foundation | Methods and apparatus for detecting a presence and severity of a cataract in ambient lighting |
| US11219367B2 (en) * | 2020-01-30 | 2022-01-11 | Reichert, Inc. | Positioning system for ophthalmic instrument |
| US11707194B2 (en) | 2020-06-18 | 2023-07-25 | Zeavision Llc | Handheld device for measuring macular pigment |
| US12440099B2 (en) | 2020-06-18 | 2025-10-14 | Prn Physician Recommended Nutriceuticals Llc | Handheld device for measuring macular pigment |
| USD1023313S1 (en) | 2021-06-17 | 2024-04-16 | Zeavision Llc | Instrument for measuring eye-health characteristics |
| CN113470815A (zh) * | 2021-06-30 | 2021-10-01 | 温州医科大学附属眼视光医院 | 基于ai技术的白内障患者视力损害程度评估系统 |
| GB2635586A (en) | 2023-11-07 | 2025-05-21 | Lightfield Medical Inc | Systems and methods for analyzing the eye |
Family Cites Families (53)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3720213A (en) * | 1971-02-05 | 1973-03-13 | Coherent Radiation | Laser photocoagulator |
| JPS5343277B2 (enExample) | 1974-06-19 | 1978-11-17 | ||
| US3915564A (en) | 1974-09-12 | 1975-10-28 | Zeiss Stiftung | Retinal image-display system |
| US4019813A (en) | 1976-01-19 | 1977-04-26 | Baylor College Of Medicine | Optical apparatus for obtaining measurements of portions of the eye |
| US4187014A (en) | 1977-01-29 | 1980-02-05 | Tokyo Kogaku Kikai Kabushiki Kaisha | Eye fundus camera |
| US4281926A (en) | 1978-07-03 | 1981-08-04 | Rodenstock Instruments Corp. | Method and means for analyzing sphero-cylindrical optical systems |
| US4329049A (en) | 1980-03-06 | 1982-05-11 | Rodenstock Instruments Corporation | Median point detecting apparatus for a lensmeter |
| JPS56151929A (en) | 1980-04-25 | 1981-11-25 | Canon Inc | Fundus camera |
| JPS5784036A (en) | 1980-11-14 | 1982-05-26 | Tokyo Optical | Apparatus for detecting correct position in ophthalmic machine |
| US4469416A (en) | 1981-04-24 | 1984-09-04 | Tokyo Kogaku Kikai Kabushiki Kaisha | Automatic focusing means for an ophthalmoscopic instrument |
| US4715703A (en) | 1982-10-12 | 1987-12-29 | Rodenstock Instrument Corporation | Ocular-fundus analyzer |
| DE3245939C2 (de) | 1982-12-11 | 1985-12-19 | Fa. Carl Zeiss, 7920 Heidenheim | Vorrichtung zur Erzeugung eines Bildes des Augenhintergrundes |
| US4711540A (en) * | 1984-01-04 | 1987-12-08 | Tokyo Kogaku Kikai Kabushiki Kaisha | Eye disease inspecting instrument |
| CH671329A5 (enExample) | 1986-01-21 | 1989-08-31 | Interzeag Ag | |
| US5072731A (en) * | 1987-09-01 | 1991-12-17 | Massachusetts Institute Of Technology | Apparatus for detecting cataractogenesis using quasielastic light scattering |
| US4993827A (en) * | 1987-09-01 | 1991-02-19 | Massachusetts Institute Of Technology | Method for detecting cataractogenesis |
| JPH01262835A (ja) | 1988-04-15 | 1989-10-19 | Kowa Co | 眼科診断方法及び装置 |
| EP0392742B1 (en) | 1989-04-10 | 1995-06-28 | Kowa Company Ltd. | Ophthalmological measurement method and apparatus |
| DE69017249T2 (de) | 1989-04-10 | 1995-08-03 | Kowa Co | Ophthalmologisches Messverfahren und Einrichtung. |
| US5196872A (en) | 1989-12-11 | 1993-03-23 | Pulse Medical Instruments | Data acquistion and pupil tracking apparatus for an ophthalmologocial instrument |
| US5210554A (en) | 1989-12-11 | 1993-05-11 | Pulse Medical Instruments | Pupil pathway analyzer |
| US5114222A (en) | 1989-12-11 | 1992-05-19 | Pulse Medical Instruments | Method and apparatus for perimetry |
| US5233517A (en) | 1990-04-30 | 1993-08-03 | Jindra Lawrence F | Early glaucoma detection by Fourier transform analysis of digitized eye fundus images |
| JP2942321B2 (ja) * | 1990-08-10 | 1999-08-30 | 株式会社ニデック | 徹照像撮影装置 |
| US5279296A (en) * | 1991-01-04 | 1994-01-18 | Oculon Corporation | Method and apparatus for detecting cataractogenesis |
| JPH04352933A (ja) * | 1991-05-29 | 1992-12-08 | Kowa Co | 眼科測定方法 |
| US5371557A (en) | 1991-09-30 | 1994-12-06 | Nidek Co., Ltd. | Stereoscopic retinal camera |
| US5684561A (en) | 1992-05-26 | 1997-11-04 | Daphne Eye Technologies | Device and method for evaluation of refraction of the eye |
| US5382988A (en) | 1992-07-31 | 1995-01-17 | Nidek Co., Ltd. | Stereoscopic retinal camera with focus detection system |
| JPH06142044A (ja) * | 1992-11-10 | 1994-05-24 | Canon Inc | 眼科測定装置 |
| JP3386839B2 (ja) | 1993-02-25 | 2003-03-17 | 興和株式会社 | 眼科検査装置 |
| JP3379592B2 (ja) | 1993-07-26 | 2003-02-24 | 株式会社トプコン | 眼底カメラ |
| JP3483922B2 (ja) * | 1993-12-24 | 2004-01-06 | 興和株式会社 | 眼科測定装置 |
| US5410376A (en) | 1994-02-04 | 1995-04-25 | Pulse Medical Instruments | Eye tracking method and apparatus |
| US5422690A (en) | 1994-03-16 | 1995-06-06 | Pulse Medical Instruments, Inc. | Fitness impairment tester |
| US5579063A (en) * | 1994-10-11 | 1996-11-26 | Magnante; Peter C. | Methods and devices for the measurement of the degradation of image quality on the retina of the human eye due to cataract |
| US5542422A (en) * | 1994-10-25 | 1996-08-06 | Oculon Corporation | System and method for detecting cataractogenesis using quasi-elastic light scattering |
| US5908394A (en) * | 1995-06-07 | 1999-06-01 | Ronsselaer Polytechnic Institute | Method and apparatus for noninvasive determination of a disease state of a human eye |
| JP3592416B2 (ja) * | 1995-10-31 | 2004-11-24 | 晃敏 吉田 | 眼内物質の測定装置 |
| JP3610136B2 (ja) | 1995-11-22 | 2005-01-12 | キヤノン株式会社 | 眼底血流計及び測定位置トラッキング装置 |
| JP3533277B2 (ja) | 1995-11-30 | 2004-05-31 | 株式会社ニデック | 眼科装置 |
| DE19638263B4 (de) | 1996-09-19 | 2004-01-29 | Carl Zeiss | Ophthalmologisches Beobachtungsgerät |
| US5912720A (en) | 1997-02-13 | 1999-06-15 | The Trustees Of The University Of Pennsylvania | Technique for creating an ophthalmic augmented reality environment |
| IL122114A0 (en) | 1997-10-21 | 1998-04-05 | Suetliza Eduardo | Apparatus for simultaneous bilateral digital retinal angiography |
| AU1627699A (en) * | 1997-12-05 | 1999-06-28 | Schepens Eye Research Institute, Inc., The | Method and apparatus for measuring visual sensitivity and optical properties of components of the eye |
| JP3660118B2 (ja) * | 1998-01-30 | 2005-06-15 | 株式会社ニデック | 前眼部撮影装置 |
| US6082856A (en) * | 1998-11-09 | 2000-07-04 | Polyvue Technologies, Inc. | Methods for designing and making contact lenses having aberration control and contact lenses made thereby |
| US6550917B1 (en) * | 2000-02-11 | 2003-04-22 | Wavefront Sciences, Inc. | Dynamic range extension techniques for a wavefront sensor including use in ophthalmic measurement |
| US6659613B2 (en) * | 2000-03-27 | 2003-12-09 | Board Of Regents, The University Of Texas System | Methods and systems for measuring local scattering and aberration properties of optical media |
| US6460997B1 (en) * | 2000-05-08 | 2002-10-08 | Alcon Universal Ltd. | Apparatus and method for objective measurements of optical systems using wavefront analysis |
| US6382795B1 (en) * | 2000-05-20 | 2002-05-07 | Carl Zeiss, Inc. | Method and apparatus for measuring refractive errors of an eye |
| US6296358B1 (en) | 2000-07-14 | 2001-10-02 | Visual Pathways, Inc. | Ocular fundus auto imager |
| GB0020728D0 (en) * | 2000-08-23 | 2000-10-11 | Kaye Wilson Lo | Opthalmic device |
-
2002
- 2002-07-23 CN CNA028186397A patent/CN1556686A/zh active Pending
- 2002-07-23 US US10/201,870 patent/US6834958B2/en not_active Expired - Fee Related
- 2002-07-23 WO PCT/US2002/023391 patent/WO2003009745A2/en not_active Ceased
- 2002-07-23 EP EP02761156A patent/EP1408815A2/en not_active Withdrawn
- 2002-07-23 KR KR10-2004-7001005A patent/KR20040030844A/ko not_active Ceased
- 2002-07-23 JP JP2003515144A patent/JP2004535880A/ja active Pending
- 2002-07-23 AU AU2002326439A patent/AU2002326439A1/en not_active Abandoned
-
2004
- 2004-11-10 US US10/986,554 patent/US7156518B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103228200A (zh) * | 2010-10-25 | 2013-07-31 | 史提芬·维杜纳 | 阿兹海默症、脑部创伤、黄斑变性与复数神经退化失调及眼病的诊断、预防以及预后侦测视网膜中淀粉样蛋白的装置与方法 |
| CN102920427A (zh) * | 2012-11-09 | 2013-02-13 | 苏州四海通仪器有限公司 | 一种睑板腺成像系统 |
| CN105615821A (zh) * | 2016-01-21 | 2016-06-01 | 吉林大学 | 一种偏光视力检测装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003009745A3 (en) | 2003-09-25 |
| KR20040030844A (ko) | 2004-04-09 |
| WO2003009745A2 (en) | 2003-02-06 |
| US20050094102A1 (en) | 2005-05-05 |
| US7156518B2 (en) | 2007-01-02 |
| US6834958B2 (en) | 2004-12-28 |
| EP1408815A2 (en) | 2004-04-21 |
| US20030058405A1 (en) | 2003-03-27 |
| AU2002326439A1 (en) | 2003-02-17 |
| JP2004535880A (ja) | 2004-12-02 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |