US5235360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic perimeter
Assignee: Topcon Corp
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Filing: 1991-09-26
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Granted: 1993-08-10
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Expires: 2011-09-26
Abstract
Abstract The present invention discloses an automatic perimeter capable of easily adding or deleting the inspecting points. The present invention includes: target mark exhibiting means exhibiting a target mark at an inspecting point where an exhibiting position is predetermined, in accordance with instructions from instructing means; display means displaying points corresponding, one by one, to the inspecting points which are to be exhibited on the exhibiting means; boundary designating means for designating an adding or deleting area of the inspecting points by drawing a closed curve on the screen of the display means; and exhibiting target mark determining means for determining the inspecting points to be exhibited on the target mark exhibiting means based on the adding or deleting area of the inspecting points determined by the boundary designating means; the instructing means instructing the target mark exhibiting means to exhibit the target marks determined by the exhibiting target mark determining means thereon in an optional order.
Inventors
- 👤 Munehiro Minami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/024
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
151 words
An automatic perimeter for measuring the field of vision of a patient, comprising: target mark exhibiting means for exhibiting a target mark at an inspecting point having a predetermined position, in accordance with instructions from an instructing means; display means having a screen for displaying points on the screen corresponding, one by one, to the inspecting points to be exhibited by said target mark exhibiting means; boundary designating means for designating an adding or deleting area of the inspecting points by drawing a closed curve on the screen of said display means; and exhibiting target mark determining means for determining the inspecting points to be exhibited by said target mark exhibiting means based on the adding or deleting area of the inspecting points determined by said boundary designating means; said instructing means instructing said target mark exhibiting means to exhibit the target marks determined by said exhibiting target mark determining means.
Claim 2
Dependent Claim
151 words
An automatic perimeter for measuring the field of vision of a patient, comprising: target mark exhibiting means for exhibiting a target mark at an inspecting point having a predetermined position, in accordance with instructions from an instructing means; display means having a screen for displaying points on the screen corresponding, one by one, to the inspecting points to be exhibited by said target mark exhibiting means; boundary designating means for designating an adding or deleting area of the inspecting points by drawing a closed curve on the screen of said display means; and exhibiting target mark determining means for determining the inspecting points to be exhibited by said target mark exhibiting means based on the adding or deleting area of the inspecting points determined by said boundary designating means; said instructing means instructing said target mark exhibiting means to exhibit the target marks determined by said exhibiting target mark determining means.
Claim 3
Dependent Claim
24 words
An automatic perimeter as claimed in claim 1, wherein said target marks are exhibited by said target mark exhibiting means in an optional order.
Claim 4
Dependent Claim
69 words
An automatic perimeter as claimed in claim 2, wherein said target mark exhibiting means includes a dome, target mark spot light emitting means for emitting a target mark spot light, and a target mark projecting mechanism for reflecting said target mark spot light and guiding said target mark spot light into a predetermined position on an inner surface of said dome in accordance with instructions from said instructing means.
Claim 5
Dependent Claim
41 words
An automatic perimeter as claimed in claim 2, wherein said display means includes means for displaying thereon target marks in such a manner that target marks which have been exhibited can be distinguished from those which have not yet been exhibited.
Claim 6
Dependent Claim
46 words
An automatic perimeter as claimed in claim 2, which further includes means for changing a pitch of the points to be displayed on the screen of said display means corresponding, one by one, to the inspecting points to be exhibited on said target mark exhibiting means.
Claim 7
Dependent Claim
52 words
An automatic perimeter as claimed in claim 2, wherein said display means displays thereon a lattice coordinate pattern for adding or deleting the inspecting points, and said boundary designating means designates the adding or deleting area of the inspecting points by drawing a closed curve by connecting lattice points by polygonal lines.
Claim 8
Dependent Claim
29 words
An automatic perimeter as claimed in claim 6, wherein a distance between the lattice points connected by the polygonal lines is greater than or equal to a predetermined value.
Claim 9
Dependent Claim
47 words
An automatic perimeter as claimed in claim 6, wherein said lattice coordinate pattern is a vertical and horizontal pattern, and a distance between the lattice points connected by the polygonal lines can be designated by assuming a horizontal pitch and a vertical pitch of the lattice points.
Claim 10
Independent Claim
114 words
A method for measuring the field of vision of a patient using an automatic perimeter, comprising: selecting an inspection pattern having a plurality of inspecting points; displaying points corresponding to said inspecting points on a screen of a display device of said automatic perimeter; designating an area of said inspection pattern from which inspecting points are added or deleted from said inspection pattern by drawing a closed curve on said screen of said display device; determining the inspecting points to be exhibited to the patient based on the area determined by said closed curve in said designating step; and exhibiting target marks to the patient at the inspecting points determined in said determining step.
Claim 11
Independent Claim
114 words
A method for measuring the field of vision of a patient using an automatic perimeter, comprising: selecting an inspection pattern having a plurality of inspecting points; displaying points corresponding to said inspecting points on a screen of a display device of said automatic perimeter; designating an area of said inspection pattern from which inspecting points are added or deleted from said inspection pattern by drawing a closed curve on said screen of said display device; determining the inspecting points to be exhibited to the patient based on the area determined by said closed curve in said designating step; and exhibiting target marks to the patient at the inspecting points determined in said determining step.
Claim 12
Dependent Claim
17 words
A method as claimed in claim 9, wherein said target marks are exhibited in an optional order.
Claim 13
Dependent Claim
57 words
A method as claimed in claim 10, further comprising the steps of: emitting a target mark spot light from said automatic perimeter; reflecting said target mark spot light and guiding said target spot light into a predetermined position on an inner surface of a dome of said automatic perimeter in accordance with instructions from said automatic perimeter.
Claim 14
Dependent Claim
49 words
A method as claimed in claim 10, wherein said inspecting points are displayed on said screen of said display device in such a manner that inspecting points which have been exhibited as target marks in said exhibiting step can be distinguished from those which have not yet been exhibited.
Claim 15
Dependent Claim
28 words
A method as claimed in claim 10, further comprising the step of changing a pitch of the points to be displayed on the screen of said display means.
Claim 16
Dependent Claim
65 words
A method as claimed in claim 10, wherein said displaying step includes displaying a lattice coordinate pattern for adding or deleting said inspection points on said screen of said display device, and said designating step includes designating the area of the inspection pattern from which inspecting points are to be added or deleted by drawing a closed curve by connecting lattice points by polygonal lines.
Claim 17
Dependent Claim
28 words
A method as claimed in claim 14, wherein a distance between the lattice points connected by said polygonal lines is greater than or equal to a predetermined value.
Claim 18
Dependent Claim
17 words
A method as claimed in claim 14, wherein said lattice coordinate pattern has horizontal and vertical coordinates.
Claim 19
Dependent Claim
41 words
A method as claimed in claim 16, further comprising the step of sampling the lattice points connected by polygonal lines by calculating a distance between said lattice points by summing a horizontal pitch and a vertical pitch of said lattice points.
References Cited (Backward Citations)
US4679920A
Cited
US5035500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-09 | 1997-02-08 | 1997-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-09 | 2001-02-08 | 2001-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-09 | 2005-02-08 | 2005-08-10 | $7700.00 | Window Closed / Lapsed |