US3737217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual examination apparatus
Assignee: National Aeronautics and Space Administration
•
Filing: 1971-07-06
•
Granted: 1973-06-05
•
Expires: 1991-07-06
Abstract
Abstract An automated visual examination apparatus for measuring visual sensitivity and mapping blind spot location including a projection system for displaying to a patient a series of visual stimuli, a response switch enabling him to indicate his reaction to the stimuli, and a recording system responsive to both the visual stimuli per se and the patient''s responses, the recording system thereby providing a correlated permanent record of both stimuli and response from which a substantive and readily apparent visual evaluation can be made.
Inventors
- 👤 R Haines
- 👤 J Fitzgerald
- 👤 S Rositano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:43
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/024; A61B3/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
Visual examination apparatus, comprising: light receiving means including, a display screen for displaying visual stimuli to a patient, and photosensitive means responsive to light and operative to generate binary coded decimal signals which control the meridian location and direction of the stimulous image; light projecting means for projecting stimulus images onto said signal display screen, and for projecting control images commensurate with said stimulus images onto said photosensitive means; said light projecting means including means for projecting light through a filmstrip containing said stimulus images and said control images and onto said light receiving means; patient responSe means for developing response signals commensurate with said visual stimuli as perceived by said patient; means responsive to said stimuli signals and said response signals and operative to develop recorder control signals; and a recorder responsive to said recorder control signals and operative to provide a comparable record of said visual stimuli and the patient response corresponding thereto.
Claim 2
Dependent Claim
155 words
Visual examination apparatus, comprising: light receiving means including, a display screen for displaying visual stimuli to a patient, and photosensitive means responsive to light and operative to generate binary coded decimal signals which control the meridian location and direction of the stimulous image; light projecting means for projecting stimulus images onto said signal display screen, and for projecting control images commensurate with said stimulus images onto said photosensitive means; said light projecting means including means for projecting light through a filmstrip containing said stimulus images and said control images and onto said light receiving means; patient responSe means for developing response signals commensurate with said visual stimuli as perceived by said patient; means responsive to said stimuli signals and said response signals and operative to develop recorder control signals; and a recorder responsive to said recorder control signals and operative to provide a comparable record of said visual stimuli and the patient response corresponding thereto.
Claim 3
Dependent Claim
25 words
Visual examination apparatus as recited in claim 1 and further comprising means for projecting one or more fixed position fixation images onto said display screen.
Claim 4
Dependent Claim
60 words
Visual examination apparatus as recited in claim 1 wherein said means responsive to said signals includes electronic control circuitry responsive to said stimuli signals and said response signals and operative to develop a first set of said recorder control signals, said control circuitry being further responsive to said stimuli signals to develop a second set of said recorder control signals.
Claim 5
Dependent Claim
45 words
Visual examination apparatus as recited in claim 3 wherein said recorder includes a pair of trace developing means responsive to said first set of control signals, and positioning means responsive to said second set of control signals and operative to position said trace developing means.
Claim 6
Dependent Claim
33 words
Visual examination apparatus as recited in claim 1 wherein said light projecting means includes a cathode ray tube and programmable means for driving said cathode ray tube in accordance with a test program.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |