CA2338060A1 - Apparatus and method for measuring vision defects of a human eye - Google Patents

Apparatus and method for measuring vision defects of a human eye Download PDF

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Publication number
CA2338060A1
CA2338060A1 CA002338060A CA2338060A CA2338060A1 CA 2338060 A1 CA2338060 A1 CA 2338060A1 CA 002338060 A CA002338060 A CA 002338060A CA 2338060 A CA2338060 A CA 2338060A CA 2338060 A1 CA2338060 A1 CA 2338060A1
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Prior art keywords
eye
retina
wavefront
focusing
reflected
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Granted
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CA002338060A
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French (fr)
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CA2338060C (en
Inventor
Junzhong Liang
James H. Burkhalter
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Alcon RefractiveHorizons LLC
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Individual
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Publication of CA2338060A1 publication Critical patent/CA2338060A1/en
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Publication of CA2338060C publication Critical patent/CA2338060C/en
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Expired - Lifetime legal-status Critical Current

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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

Abstract

Optical characteristics of optical systems, such as the eye (14), are measured including vision defects of the eye using a collimated beam (12) from a diode laser (66) focused onto the anterior surface (22) of the comes (24) of the eye for providing a finite source (16) of secondary radiation on the retina (18) of the eye, the image of which is close to a desired diffraction limited spot. The secondary radiation is reflected back from the retina (18) as a reflected wavefront of radiation that passes through the eye and is directed onto a wavefront analyzer (42) where distortions associated with the reflected wavefront are measured. By focusing on the cornea (24) through a long focal length lens (70) and thus converging the beam through a small angle (13), as opposed to typically focusing a collimated light onto the retina (18), the need for lenses or lens combinations, and the time required to adjust such to accommodate the differing vision of each patient is eliminated.
CA002338060A 1998-08-19 1999-04-20 Apparatus and method for measuring vision defects of a human eye Expired - Lifetime CA2338060C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US9708698P 1998-08-19 1998-08-19
US60/097,086 1998-08-19
PCT/US1999/008709 WO2000010448A1 (en) 1998-08-19 1999-04-20 Apparatus and method for measuring vision defects of a human eye

Publications (2)

Publication Number Publication Date
CA2338060A1 true CA2338060A1 (en) 2000-03-02
CA2338060C CA2338060C (en) 2005-03-15

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Family Applications (1)

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CA002338060A Expired - Lifetime CA2338060C (en) 1998-08-19 1999-04-20 Apparatus and method for measuring vision defects of a human eye

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US (1) US6270221B1 (en)
EP (1) EP1105037B1 (en)
JP (1) JP3599276B2 (en)
AT (1) ATE222074T1 (en)
AU (1) AU747840B2 (en)
BR (1) BR9913130A (en)
CA (1) CA2338060C (en)
DE (1) DE69902549T2 (en)
ES (1) ES2184445T3 (en)
MX (1) MXPA01001167A (en)
PT (1) PT1105037E (en)
WO (1) WO2000010448A1 (en)

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EP1105037B1 (en) 2002-08-14
DE69902549T2 (en) 2003-04-17
PT1105037E (en) 2002-11-29
EP1105037A1 (en) 2001-06-13
DE69902549D1 (en) 2002-09-19
JP2002523119A (en) 2002-07-30
WO2000010448A1 (en) 2000-03-02
AU747840B2 (en) 2002-05-23
AU3657699A (en) 2000-03-14
ES2184445T3 (en) 2003-04-01
ATE222074T1 (en) 2002-08-15
MXPA01001167A (en) 2002-04-24
BR9913130A (en) 2001-05-08
US6270221B1 (en) 2001-08-07
JP3599276B2 (en) 2004-12-08
CA2338060C (en) 2005-03-15

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