WO2007082146A3 - Autorefractor for detecting light intensities to extract higher-order refractions and method for use - Google Patents

Autorefractor for detecting light intensities to extract higher-order refractions and method for use Download PDF

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Publication number
WO2007082146A3
WO2007082146A3 PCT/US2007/060136 US2007060136W WO2007082146A3 WO 2007082146 A3 WO2007082146 A3 WO 2007082146A3 US 2007060136 W US2007060136 W US 2007060136W WO 2007082146 A3 WO2007082146 A3 WO 2007082146A3
Authority
WO
WIPO (PCT)
Prior art keywords
photosensor data
autorefractor
eye
patient
focal length
Prior art date
Application number
PCT/US2007/060136
Other languages
French (fr)
Other versions
WO2007082146A2 (en
Inventor
Alan Shinn
Don Yancey
Urban Schnell
Charles E Campbell
Joel Niederhauser
Original Assignee
Daphne Instr Inc
Alan Shinn
Don Yancey
Urban Schnell
Charles E Campbell
Joel Niederhauser
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daphne Instr Inc, Alan Shinn, Don Yancey, Urban Schnell, Charles E Campbell, Joel Niederhauser filed Critical Daphne Instr Inc
Publication of WO2007082146A2 publication Critical patent/WO2007082146A2/en
Publication of WO2007082146A3 publication Critical patent/WO2007082146A3/en

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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
    • A61B3/1015—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for wavefront analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0448—Adjustable, e.g. focussing

Abstract

An autorefractor is capable of determining higher order refraction characteristics of a patient's eye. An incident light beam projects into the patient's eye, producing a refracted light beam, which passes through a detector lens to produces a converged beam falling upon first and second sensors. Focal length of the detector and/or sensor position are variable. Focal length and/or position are changed so that one of the sensors lies in a position that corresponds to a retinal conjugate of the patient's eye, and first photosensor data is gathered. The first photosensor data is analyzed to determine retinal deep scatter. Then, the focal length and/or sensor position is changed so that the converged light that falls upon the sensor takes up a relatively larger area, producing second photosensor data. The determined retinal deep scatter from first photosensor data is subtracted from the second photosensor data.
PCT/US2007/060136 2006-01-05 2007-01-05 Autorefractor for detecting light intensities to extract higher-order refractions and method for use WO2007082146A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US75721106P 2006-01-05 2006-01-05
US60/757,211 2006-01-05
US81222406P 2006-06-09 2006-06-09
US60/812,224 2006-06-09

Publications (2)

Publication Number Publication Date
WO2007082146A2 WO2007082146A2 (en) 2007-07-19
WO2007082146A3 true WO2007082146A3 (en) 2007-12-13

Family

ID=38257079

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/060136 WO2007082146A2 (en) 2006-01-05 2007-01-05 Autorefractor for detecting light intensities to extract higher-order refractions and method for use

Country Status (1)

Country Link
WO (1) WO2007082146A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6764745B2 (en) * 2016-09-28 2020-10-07 株式会社トプコン Ophthalmic equipment
TWI720353B (en) * 2018-10-18 2021-03-01 晉弘科技股份有限公司 Fundus camera and method for self-shooting fundus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5684561A (en) * 1992-05-26 1997-11-04 Daphne Eye Technologies Device and method for evaluation of refraction of the eye
US6042232A (en) * 1999-01-21 2000-03-28 Leica Microsystems Inc. Automatic optometer evaluation method using data over a wide range of focusing positions
EP1021985A1 (en) * 1999-01-20 2000-07-26 Leica Microsystems Inc. , Ophthalmic Instruments Division Ophthalmic instrument having self-calibrating optical system
US6369954B1 (en) * 1997-10-08 2002-04-09 Universite Joseph Fourier Lens with variable focus
US6761454B2 (en) * 2002-02-13 2004-07-13 Ophthonix, Inc. Apparatus and method for determining objective refraction using wavefront sensing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5684561A (en) * 1992-05-26 1997-11-04 Daphne Eye Technologies Device and method for evaluation of refraction of the eye
US6369954B1 (en) * 1997-10-08 2002-04-09 Universite Joseph Fourier Lens with variable focus
EP1021985A1 (en) * 1999-01-20 2000-07-26 Leica Microsystems Inc. , Ophthalmic Instruments Division Ophthalmic instrument having self-calibrating optical system
US6042232A (en) * 1999-01-21 2000-03-28 Leica Microsystems Inc. Automatic optometer evaluation method using data over a wide range of focusing positions
US6761454B2 (en) * 2002-02-13 2004-07-13 Ophthonix, Inc. Apparatus and method for determining objective refraction using wavefront sensing

Also Published As

Publication number Publication date
WO2007082146A2 (en) 2007-07-19

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