US4523820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Procedure and means for establishing and recording errors of the eye
Assignee: Individual
•
Filing: 1982-05-12
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Granted: 1985-06-18
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Expires: 2002-05-12
Abstract
Abstract A procedure and means for establishing and recording errors of the eye, the eye being illuminated with the aid of a flash-light (3) placed eccentrically with reference to the objective (2) of the camera (1). The cornea and retina are photographed simultaneously in at least two different meridians (5, 6) of the eye in order to elicit and record the retinal reflections and corneal reflections occurring in these. The apparatus comprises members for the simultaneous photographing of the eye in two different meridians of the eye, for instance a camera provided with an objective (2) and with two point lights (3, 4) disposed in different meridians of the objective, or with one flash-light (3) and two objectives (2, 2') placed in different meridians of the latter.
Inventors
- 👤 Kari A. Kaakinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:47
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/107; A61B3/14; G; G03; G03B; G03B15/00; G03B15/02; G03B15/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A method for establishing and recording errors of the eye which comprises simultaneously photographing from a distance of at least about one meter from the eye the cornea, corneal reflexes and retinal reflexes of the eye in at least two different meridians of the eye using a camera having at least one objective lens and at least one light source, the objective lens and light source being disposed in different meridians of the eye.
Claim 2
Independent Claim
74 words
A method for establishing and recording errors of the eye which comprises simultaneously photographing from a distance of at least about one meter from the eye the cornea, corneal reflexes and retinal reflexes of the eye in at least two different meridians of the eye using a camera having at least one objective lens and at least one light source, the objective lens and light source being disposed in different meridians of the eye.
Claim 3
Dependent Claim
35 words
A method according to claim 1 wherein the photographing is carried out simultaneously using two objective camera lenses disposed eccentrically to a light source and in different meridians of the eye than the light source.
Claim 4
Dependent Claim
44 words
A method in accordance with claim 1 wherein the photographing is carried out simultaneously while directing light to the eye from at least two light sources disposed eccentrically with respect to the objective lens of the camera and in different meridians of the eye.
Claim 5
Dependent Claim
74 words
A method in accordance with claim 1 wherein the photographing is carried out simultaneously while directing light to the eye from at least two light sources, one light source being disposed in a plane vertical to the objective lens and another light source being disposed in a plane horizontal to the objective lens, and both light sources being disposed at a given distance from the optical axis of the objective lens of the camera.
Claim 6
Dependent Claim
39 words
A method in accordance with claim 1 wherein the photographing is carried out simultaneously by directing light to the eye from a series of light sources arranged eccentrically and annularly with respect to the objective lens of the camera.
Claim 7
Dependent Claim
18 words
A method in accordance with claim 5 wherein the series of light sources comprises a ring flash-light unit.
Claim 8
Dependent Claim
37 words
A method in accordance with claim 1 wherein the photographing is carried out simultaneously by directing light to the eye from punctiform light sources arranged eccentrically and annularly with respect to the objective lens of the camera.
References Cited (Backward Citations)
US4259948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |