US5382989A
Expired / Lapsed
US
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Apparatus for examining gaze shift in depth direction
Assignee: ATR AUDITORY AND VISUAL PERCEPTION RESEARCH
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Filing: 1993-03-16
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Granted: 1995-01-17
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Expires: 2013-03-16
Abstract
Abstract In an apparatus for examining gaze shift in depth direction, light emitting diodes B and E, or D and C are lit at a plurality of positions with different distance in depth direction from the subject, and eye movement of the subject at that time is detected by an eye movement detecting portion. The signal of detection is processed in a signal processing circuit and is applied to a calculating portion. The calculating portion determines whether or not there is a disorder in gaze shift in depth direction of the subject by using any or all of latency in eye movement, time constant, amplitude, change in convergence angle, number of occurrence of saccade, and asymmetry of left and right eye movements, in response to the detected output of the eye movement.
Inventors
- 👤 Kenya Uomori
- 👤 Mitsuho Yamada
- 👤 Hitoshi Hongo
- 👤 Hiroshi Yoshimatsu
- 👤 Keiichi Ueno
- 👤 Shinji Murakami
- 👤 Mitsuru Fujii
- 👤 Norihito Nakano
- 👤 Jiro Miyazawa
- 👤 Ryo Fukatsu
- 👤 Naohiko Takahata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:28
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/113
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
An apparatus for examining gaze shift for detecting movement of line-of-sight in depth direction for a subject, comprising: eye movement detecting means for detecting movement of left and right eyes of said subject; target presenting means for presenting a target for depth perception to said subject; target control means for controlling said target presenting means; and determining means responsive to a detection output from said eye movement detecting means when said subject is gazing at the target presented by said target presenting means, for determining whether there is a disorder in gaze shift in depth direction of said subject.
Claim 2
Independent Claim
99 words
An apparatus for examining gaze shift for detecting movement of line-of-sight in depth direction for a subject, comprising: eye movement detecting means for detecting movement of left and right eyes of said subject; target presenting means for presenting a target for depth perception to said subject; target control means for controlling said target presenting means; and determining means responsive to a detection output from said eye movement detecting means when said subject is gazing at the target presented by said target presenting means, for determining whether there is a disorder in gaze shift in depth direction of said subject.
Claim 3
Dependent Claim
70 words
The apparatus for examining gaze shift in depth direction according to claim 1, further comprising: head movement detecting means for detecting head movement of said subject; wherein said determining means includes means for determining whether there is a disorder in gaze shift in depth direction of said subject in response to a detection output from said eye movement detecting means and a detection output from said head movement detecting means.
Claim 4
Independent Claim
136 words
An apparatus for examining gaze shift for detecting movement of line-of-sight in depth direction of a subject, comprising: eye movement detecting means for detecting movement of left and right eyes of said subject; target presenting means for presenting a target for depth perception to said subject; target control means for controlling said target presenting means; and determining means responsive to a detection output from said eye movement detecting means when said subject is gazing at the target presented by said target presenting means, for determining whether there is a disorder in gaze shift in depth direction of said subject; wherein said determining means includes means for determining characteristics in gaze shift of said subject on the basis of time change of a convergence angle, in response to a detection output from said eye movement detecting means.
Claim 5
Independent Claim
136 words
An apparatus for examining gaze shift for detecting movement of line-of-sight in depth direction of a subject, comprising: eye movement detecting means for detecting movement of left and right eyes of said subject; target presenting means for presenting a target for depth perception to said subject; target control means for controlling said target presenting means; and determining means responsive to a detection output from said eye movement detecting means when said subject is gazing at the target presented by said target presenting means, for determining whether there is a disorder in gaze shift in depth direction of said subject; wherein said determining means includes means for determining characteristics in gaze shift of said subject on the basis of time change of a convergence angle, in response to a detection output from said eye movement detecting means.
Claim 6
Dependent Claim
69 words
The apparatus for examining gaze shift in depth direction according to claim 3, wherein said determining means includes means for determining whether there is a disorder in gaze shift in depth direction by using at least one of latency in gaze shift, time constant, amplitude, change in the convergence angle, number of occurrence of saccade, and asymmetry of left and right eye movement, as characteristics of said eye movement.
Claim 7
Independent Claim
202 words
An apparatus for examining gaze shift for detecting movement of line-of-sight in depth direction of a subject, comprising: eye movement detecting means for detecting movement of left and right eyes of said subject; target presenting means for presenting a target for depth perception to said subject; target control means for controlling said target presenting means; determining means responsive to a detection output from said eye movement detecting means when said subject is gazing at the target presented by said target presenting means, for determining whether there is a disorder in gaze shift in depth direction of said subject; and head movement detecting means for detecting head movement of said subject; wherein said determining means includes means for determining whether there is a disorder in gaze shift in depth direction of said subject in response to a detection output from said eye movement detecting means and a detection output from said head movement detecting means, and wherein said determining means includes means for determining characteristics of gaze shift of said subject on the basis of time change of the convergence angle in response to a detection output from said eye movement detecting means and a detection output from said head movement detecting means.
Claim 8
Independent Claim
202 words
An apparatus for examining gaze shift for detecting movement of line-of-sight in depth direction of a subject, comprising: eye movement detecting means for detecting movement of left and right eyes of said subject; target presenting means for presenting a target for depth perception to said subject; target control means for controlling said target presenting means; determining means responsive to a detection output from said eye movement detecting means when said subject is gazing at the target presented by said target presenting means, for determining whether there is a disorder in gaze shift in depth direction of said subject; and head movement detecting means for detecting head movement of said subject; wherein said determining means includes means for determining whether there is a disorder in gaze shift in depth direction of said subject in response to a detection output from said eye movement detecting means and a detection output from said head movement detecting means, and wherein said determining means includes means for determining characteristics of gaze shift of said subject on the basis of time change of the convergence angle in response to a detection output from said eye movement detecting means and a detection output from said head movement detecting means.
Claim 9
Dependent Claim
68 words
The apparatus for examining gaze shift in depth direction according to claim 5, wherein said determining means includes means for determining whether there is a disorder in gaze shift in depth direction by using at least one of latency of gaze shift, time constant, amplitude, change in convergence angle,number of occurrence of saccade, and asymmetry of left and right eye movement as said characteristics of the eye movement.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-16 | 1998-07-18 | 1999-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-16 | 2002-07-18 | 2003-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-16 | 2006-07-18 | 2007-01-17 | $7700.00 | Window Closed / Lapsed |