GB331862A - Improvements in ophthalmoscopes and like instruments - Google Patents
Improvements in ophthalmoscopes and like instrumentsInfo
- Publication number
- GB331862A GB331862A GB1099129A GB1099129A GB331862A GB 331862 A GB331862 A GB 331862A GB 1099129 A GB1099129 A GB 1099129A GB 1099129 A GB1099129 A GB 1099129A GB 331862 A GB331862 A GB 331862A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ophthalmoscopes
- lamp
- instruments
- apertures
- retinoscope
- 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
- A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
- A61B3/1208—Multiple lens hand-held instruments
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
331,862. Fincham, E. F., and Clarke, C. April 9, 1929. Ophthalmoscopes. - In an ophthalmoscope of the type adapted also for use as a retinoscope, the sight hole H in the inclined mirror F is situated near to, but not coincident with, the point on which the beam from the lamp A is projected. The result is that the axes of illumination and observation are inclined to one another and corneal reflections do not obstruct the view of the observer. A rotatable disc is mounted in the path of the rays from the lamp A and provided with slits, circular apertures, or colour filters for alternative use. Ventilating apertures M and passages are provided in the casings B, L.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1099129A GB331862A (en) | 1929-04-09 | 1929-04-09 | Improvements in ophthalmoscopes and like instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1099129A GB331862A (en) | 1929-04-09 | 1929-04-09 | Improvements in ophthalmoscopes and like instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB331862A true GB331862A (en) | 1930-07-09 |
Family
ID=9978033
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1099129A Expired GB331862A (en) | 1929-04-09 | 1929-04-09 | Improvements in ophthalmoscopes and like instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB331862A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2469388A (en) * | 1946-04-24 | 1949-05-10 | American Cystoscope Makers Inc | Multiple lens hand type ophthalmoscope |
DE1194174B (en) * | 1963-06-05 | 1965-06-03 | Rodenstock Optik G | Lighting device for ophthalmoscope |
GB2499650A (en) * | 2012-02-24 | 2013-08-28 | Keeler Ltd | Ophthalmic instrument with graticule |
GB2505546A (en) * | 2012-09-03 | 2014-03-05 | Zumax Medical Co Ltd | Retinoscope with condensing lens column |
-
1929
- 1929-04-09 GB GB1099129A patent/GB331862A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2469388A (en) * | 1946-04-24 | 1949-05-10 | American Cystoscope Makers Inc | Multiple lens hand type ophthalmoscope |
DE1194174B (en) * | 1963-06-05 | 1965-06-03 | Rodenstock Optik G | Lighting device for ophthalmoscope |
GB2499650A (en) * | 2012-02-24 | 2013-08-28 | Keeler Ltd | Ophthalmic instrument with graticule |
GB2499650B (en) * | 2012-02-24 | 2018-04-25 | Keeler Ltd | Ophthalmic instrument |
GB2505546A (en) * | 2012-09-03 | 2014-03-05 | Zumax Medical Co Ltd | Retinoscope with condensing lens column |
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