US4874236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmologic apparatus for fundus examination
Assignee: Ramot at Tel Aviv University Ltd
•
Filing: 1988-03-02
•
Granted: 1989-10-17
•
Expires: 2008-03-02
Abstract
Abstract Ophthalmologic apparatus for fundus examination of a patient's eyes, comprises a base, an illumination device carried by the base and rotatable about a vertical axis, a microscope carried by the base and rotatable about the vertical axis, a fixture for fixing the patient's head and eyes with respect to the vertical axis, a vertical rod carried by the base along the vertical axis, and a lens carried at the upper end of the vertical rod in the optical axis of the microscope and the examined eye and displaced from the vertical axis towards the examined eye such as to image the retina of the examined eye at a location for reimaging it by the microscope. The described apparatus enables funduscopic examinations to be made in a very convenient manner using existing opthalmological slit lamps.
Inventors
- 👤 Fabian Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:24
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/13; A61B3/135
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
126 words
Ophtalmologic apparatus for fundus examination of a patient's eyes, comprising: a base, an illumination device carried by said base and rotatable about a vertical axis, a microscope carried by said base and rotatable about said vertical axis, a fixture for fixing the patient's head and eyes with respect to said vertical axis, a vertical rod carried by said base along said vertical axis, and a lens carried at the upper end of said vertical rod in the optical axis of the microscope and the examined eye and displaced from said vertical axis towards said examined eye for a fixed distance, corresponding to the power of said lens, such as to image the retina of the examined eye at a location for reimaging it by the microscope.
Claim 2
Dependent Claim
126 words
Ophtalmologic apparatus for fundus examination of a patient's eyes, comprising: a base, an illumination device carried by said base and rotatable about a vertical axis, a microscope carried by said base and rotatable about said vertical axis, a fixture for fixing the patient's head and eyes with respect to said vertical axis, a vertical rod carried by said base along said vertical axis, and a lens carried at the upper end of said vertical rod in the optical axis of the microscope and the examined eye and displaced from said vertical axis towards said examined eye for a fixed distance, corresponding to the power of said lens, such as to image the retina of the examined eye at a location for reimaging it by the microscope.
Claim 3
Dependent Claim
53 words
The apparatus according to claim 1, wherein said lens is a double aspheric +90 diiopter lens and is carried by a horizontal support attached to the upper end of said vertical rod and is positioned by said horizontal support about 11 mm along said optical axis towards the location of the examined eye.
Claim 4
Dependent Claim
20 words
The apparatus according to claim 1, wherein said lens is mounted for lateral movement with respect to said optical axis.
Claim 5
Dependent Claim
17 words
The apparatus according to claim 3, wherein said lens includes a handle to facilitate sliding it laterally.
Claim 6
Dependent Claim
19 words
The apparatus according to claim 1, wherein said lens is also mounted for vertical movement along said vertical axis.
Claim 7
Dependent Claim
24 words
The apparatus according to claim 5, wherein said vertical rod includes a spring permitting limited vertical movement thereof and of the lens carried thereby.
Claim 8
Dependent Claim
31 words
The apparatus according to claim 1, wherein said vertical rod, together with the lens carried thereby, is removably mounted in a tubular member carried by said base along said vertical axis.
Claim 9
Dependent Claim
146 words
An attachment for an ophthalmologic apparatus for fundus examination of a patient's eye comprising a base, a slit lamp carried by said base and rotatable about a vertical axis, a microscope carried by said base and rotatable about said vertical axis, and a fixture for fixing the patient's head and eyes to be examined with respect to said vertical axis; said attachment comprising a vertical rod to be attached to said base and to extend along said vertical axis; and a lens carried at the upper end of said vertical rod so as to be positioned in the optical axis of the microscope and examined eye and displaced from said vertical axis towards said examined eye for a fixed distance, corresponding to the power of said lens, such as to image the retina of the examined eye in a position for reimaging it by the microscope.
Claim 10
Dependent Claim
146 words
An attachment for an ophthalmologic apparatus for fundus examination of a patient's eye comprising a base, a slit lamp carried by said base and rotatable about a vertical axis, a microscope carried by said base and rotatable about said vertical axis, and a fixture for fixing the patient's head and eyes to be examined with respect to said vertical axis; said attachment comprising a vertical rod to be attached to said base and to extend along said vertical axis; and a lens carried at the upper end of said vertical rod so as to be positioned in the optical axis of the microscope and examined eye and displaced from said vertical axis towards said examined eye for a fixed distance, corresponding to the power of said lens, such as to image the retina of the examined eye in a position for reimaging it by the microscope.
Claim 11
Dependent Claim
53 words
The attachment according to claim 8, wherein said lens is a double aspheric +90 diopter lens and is carried by a horizontal support attached to the upper end of said vertical rod and is positioned by said horizontal support about 11 mm along said optical axis towards the location of the examined eye.
Claim 12
Dependent Claim
20 words
The attachment according to claim 8, wherein said lens is mounted for lateral movement with respect to said optical axis.
Claim 13
Dependent Claim
17 words
The attachment according to claim 8, wherein said lens includes a handle to facilitate sliding it laterally.
Claim 14
Dependent Claim
18 words
The attachment according to claim 8, wherein said lens is mounted for vertical movement along said vertical axis.
Claim 15
Dependent Claim
24 words
The attachment according to claim 8, wherein said vertical rod includes a spring permitting limited vertical movement thereof and of the lens carried thereby.
Claim 16
Dependent Claim
31 words
The attachment according to claim 8, wherein said vertical rod, together with the lens carried thereby, is removably mounted in a tubular member carried by said base along said vertical axis.
References Cited (Backward Citations)
US2999422A
Cited
US3944343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |