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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

Info

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
Grant status
Application
Patent type
Prior art keywords
data
photosensor
light
position
patient
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

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/1015Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for wavefront analysis
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00Photometry, e.g. photographic exposure meter
    • G01J1/02Details
    • G01J1/04Optical or mechanical part supplementary adjustable parts
    • G01J1/0407Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0448Adjustable, 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 WO2007082146A3 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US75721106 true 2006-01-05 2006-01-05
US60/757,211 2006-01-05
US81222406 true 2006-06-09 2006-06-09
US60/812,224 2006-06-09

Publications (2)

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

Family

ID=38257079

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/060136 WO2007082146A3 (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) WO2007082146A3 (en)

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 Type
WO2007082146A2 (en) 2007-07-19 application

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