GB318487A - Improvements in ophthalmoscopes for instructional purposes - Google Patents
Improvements in ophthalmoscopes for instructional purposesInfo
- Publication number
- GB318487A GB318487A GB26259/29A GB2625929A GB318487A GB 318487 A GB318487 A GB 318487A GB 26259/29 A GB26259/29 A GB 26259/29A GB 2625929 A GB2625929 A GB 2625929A GB 318487 A GB318487 A GB 318487A
- Authority
- GB
- United Kingdom
- Prior art keywords
- eye
- rays
- objective
- ophthalmoscopes
- viewed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/13—Ophthalmic microscopes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Ophthalmology & Optometry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Eye Examination Apparatus (AREA)
Abstract
318,487. Zeiss, C., [Firm of]. Sept. 3, 1928, [Convention date]. Ophthalanoscopes are constructed so that the image of the background of the eye illuminated by an illumination system 4, 6, can be viewed simultaneously by several observers. The opthalmoscope of the Gullstrand type comprises a non-spherical lens 1, an objective 2 and an eyepiece 3, 3<1> by which the eye 21 is viewed. In the path of the rays between the lens 1 and the objective 2 are placed two prisms 9, 10 diverting portions of the rays through objectives 11, 12 to semi-transparent reflectors 13, 14 whereby each pencil of rays is divided so that, in the example shown, four additional observers may examine the eye 21. Diaphragms 8, 19, 20 are imaged in the pupil of the eye 21 and constitute apertures for the corresponding examination systems.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE318487X | 1928-09-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB318487A true GB318487A (en) | 1930-04-03 |
Family
ID=6151042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26259/29A Expired GB318487A (en) | 1928-09-03 | 1929-08-29 | Improvements in ophthalmoscopes for instructional purposes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB318487A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2737078A (en) * | 1951-12-03 | 1956-03-06 | Greenberg Morris | Ophthalmoscopes |
| US2882789A (en) * | 1953-08-18 | 1959-04-21 | Mathew R Wilson | Dual retinoscope |
| DE3919181C1 (en) * | 1989-06-12 | 1990-09-06 | Heine Optotechnik Gmbh & Co Kg, 8036 Herrsching, De | |
| US5333018A (en) * | 1991-01-07 | 1994-07-26 | Heine Optotechnik Gmbh | Binocular ophthalmoscope |
-
1929
- 1929-08-29 GB GB26259/29A patent/GB318487A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2737078A (en) * | 1951-12-03 | 1956-03-06 | Greenberg Morris | Ophthalmoscopes |
| US2882789A (en) * | 1953-08-18 | 1959-04-21 | Mathew R Wilson | Dual retinoscope |
| DE3919181C1 (en) * | 1989-06-12 | 1990-09-06 | Heine Optotechnik Gmbh & Co Kg, 8036 Herrsching, De | |
| US5333018A (en) * | 1991-01-07 | 1994-07-26 | Heine Optotechnik Gmbh | Binocular ophthalmoscope |
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