CA2308172A1 - Eye fixation monitor and tracker - Google Patents

Eye fixation monitor and tracker Download PDF

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Publication number
CA2308172A1
CA2308172A1 CA002308172A CA2308172A CA2308172A1 CA 2308172 A1 CA2308172 A1 CA 2308172A1 CA 002308172 A CA002308172 A CA 002308172A CA 2308172 A CA2308172 A CA 2308172A CA 2308172 A1 CA2308172 A1 CA 2308172A1
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Canada
Prior art keywords
light
eye
reflected
retro
refringence
Prior art date
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CA002308172A
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French (fr)
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CA2308172C (en
Inventor
David Lee Guyton
David George Hunter
Saurabh Navinchandra Patel
Julie Christine Sandruck
Robert Lee Fry
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Publication of CA2308172A1 publication Critical patent/CA2308172A1/en
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Publication of CA2308172C publication Critical patent/CA2308172C/en
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Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0093—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
    • 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
    • A61B3/113—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining or recording eye movement

Abstract

Apparatus and method are provided for assessing direction of fixation of an eye by detecting polarization related changes in light retro-reflected from the fundus of the eye. By assessment of polarization related changes in retro-reflected light from multiple retinal areas either sequentially or simultaneously, characteristic bi-refringence signatures of portions of the retina can be identified which are used to assess the direction of fixation of the eye. Interference from corneal bi-refringence is reduced using incident light having a polarization state that is substantially independent of meridional direction. Light source (55) provides a diverging beam of polarized light on faceted prism (56). Mask (57) containing seven round apertures is placed adjacent to faceted prism (56) to isolate seven round beams of light. Light retro-reflected from eye (58) is partially reflected by beam splitter (59) which is imaged by lens (60) onto the detection system including polarizing beam splitter (61), and six element detectors (62, 63).
CA002308172A 1997-10-21 1998-10-20 Eye fixation monitor and tracker Expired - Lifetime CA2308172C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US6291297P 1997-10-21 1997-10-21
US60/062,912 1997-10-21
PCT/US1998/022122 WO1999020173A1 (en) 1997-10-21 1998-10-20 Eye fixation monitor and tracker

Publications (2)

Publication Number Publication Date
CA2308172A1 true CA2308172A1 (en) 1999-04-29
CA2308172C CA2308172C (en) 2007-12-11

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ID=22045658

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002308172A Expired - Lifetime CA2308172C (en) 1997-10-21 1998-10-20 Eye fixation monitor and tracker

Country Status (6)

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US (1) US6027216A (en)
EP (1) EP1024741A4 (en)
JP (1) JP4268753B2 (en)
AU (1) AU741220B2 (en)
CA (1) CA2308172C (en)
WO (1) WO1999020173A1 (en)

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* Cited by examiner, † Cited by third party
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