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WO2004003597A3 - Method and system for improving accuracy in autorefraction measurements by including measurement distance between the photorecptors and the scattering location in an eye - Google Patents

Method and system for improving accuracy in autorefraction measurements by including measurement distance between the photorecptors and the scattering location in an eye Download PDF

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Publication number
WO2004003597A3
WO2004003597A3 PCT/US2003/020187 US0320187W WO2004003597A3 WO 2004003597 A3 WO2004003597 A3 WO 2004003597A3 US 0320187 W US0320187 W US 0320187W WO 2004003597 A3 WO2004003597 A3 WO 2004003597A3
Authority
WO
WIPO (PCT)
Prior art keywords
eye
measurements
photorecptors
scattering location
measurement distance
Prior art date
Application number
PCT/US2003/020187
Other languages
French (fr)
Other versions
WO2004003597A2 (en
Inventor
Richard James Copland
Original Assignee
Wavefront Sciences Inc
Richard James Copland
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 Wavefront Sciences Inc, Richard James Copland filed Critical Wavefront Sciences Inc
Priority to AU2003253724A priority Critical patent/AU2003253724A1/en
Priority to US10/640,321 priority patent/US7494220B2/en
Publication of WO2004003597A2 publication Critical patent/WO2004003597A2/en
Publication of WO2004003597A3 publication Critical patent/WO2004003597A3/en

Links

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
    • 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
    • A61B3/1005—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring distances inside the eye, e.g. thickness of the cornea
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4788—Diffraction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4795—Scattering, i.e. diffuse reflection spatially resolved investigating of object in scattering medium
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/4788—Diffraction
    • G01N2021/479—Speckle

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Biochemistry (AREA)
  • Biomedical Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Optics & Photonics (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

A method and associated system (400) improve accuracy in objective refraction measurements by including the measured distance between the photoreceptors of a subject's eye and the scattering location of light during the objective refraction measurements. Chromatic aberrations in the objective measurements are also compensated. The distance between the photoreceptors and the scattering location may be determined by adjusting a distance between a rotating speckled light pattern and an eye until the speckled light pattern appears to be stationary, or by employing a Scheiner disk.
PCT/US2003/020187 2002-06-27 2003-06-27 Method and system for improving accuracy in autorefraction measurements by including measurement distance between the photorecptors and the scattering location in an eye WO2004003597A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003253724A AU2003253724A1 (en) 2002-06-27 2003-06-27 Method and system for improving accuracy in autorefraction measurements by including measurement distance between the photorecptors and the scattering location in an eye
US10/640,321 US7494220B2 (en) 2002-06-27 2003-08-14 Method and system for improving accuracy in autorefraction measurements by including measurement distance between the photorecptors and the scattering location in an eye

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39166802P 2002-06-27 2002-06-27
US60/391,668 2002-06-27

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/640,321 Continuation US7494220B2 (en) 2002-06-27 2003-08-14 Method and system for improving accuracy in autorefraction measurements by including measurement distance between the photorecptors and the scattering location in an eye

Publications (2)

Publication Number Publication Date
WO2004003597A2 WO2004003597A2 (en) 2004-01-08
WO2004003597A3 true WO2004003597A3 (en) 2004-04-29

Family

ID=30000731

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/020187 WO2004003597A2 (en) 2002-06-27 2003-06-27 Method and system for improving accuracy in autorefraction measurements by including measurement distance between the photorecptors and the scattering location in an eye

Country Status (2)

Country Link
AU (1) AU2003253724A1 (en)
WO (1) WO2004003597A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5016643A (en) * 1990-05-02 1991-05-21 Board Of Regents, The University Of Texas System Vascular entoptoscope
US6634752B2 (en) * 2002-03-11 2003-10-21 Alcon, Inc. Dual-path optical system for measurement of ocular aberrations and corneal topometry and associated methods
US6637884B2 (en) * 2001-12-14 2003-10-28 Bausch & Lomb Incorporated Aberrometer calibration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5016643A (en) * 1990-05-02 1991-05-21 Board Of Regents, The University Of Texas System Vascular entoptoscope
US6637884B2 (en) * 2001-12-14 2003-10-28 Bausch & Lomb Incorporated Aberrometer calibration
US6634752B2 (en) * 2002-03-11 2003-10-21 Alcon, Inc. Dual-path optical system for measurement of ocular aberrations and corneal topometry and associated methods

Also Published As

Publication number Publication date
AU2003253724A1 (en) 2004-01-19
AU2003253724A8 (en) 2004-01-19
WO2004003597A2 (en) 2004-01-08

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