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 PDFInfo
- 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
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
-
- 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
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)
- Testing Of Optical Devices Or Fibers (AREA)
- Eye Examination Apparatus (AREA)
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.
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)
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)
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 |
-
2007
- 2007-01-05 WO PCT/US2007/060136 patent/WO2007082146A2/en active Application Filing
Patent Citations (5)
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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