GB1264249A - - Google Patents
Info
- Publication number
- GB1264249A GB1264249A GB1264249DA GB1264249A GB 1264249 A GB1264249 A GB 1264249A GB 1264249D A GB1264249D A GB 1264249DA GB 1264249 A GB1264249 A GB 1264249A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- biprism
- tonometers
- stereomicroscope
- jan
- 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
- A61B3/16—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring intraocular pressure, e.g. tonometers
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
1,264,249. Tonometers. AMERICAN OPTICAL CORP. 9 Dec., 1969 [8 Jan., 1969], No. 60008/69. Heading ASK. [Also in Division G2] In an applanation tonometer, a contact element 10 (Fig. 1) is viewed through a stereomicroscope 2 and a biprism 24 (Fig. 3) is placed at the entrance pupil in order to produce two images of the contact area. The biprism is mounted on a plate 18 with its apex passing through the axes of two of four apertures 20 in the plate 18, and the plate is fixed to a flange 16 to form an assembly 14 which may be fitted onto, and rotated relative to, the objective 6. A partial reflector 8 is used to reflect illumination light towards the eye 12.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US78979069A | 1969-01-08 | 1969-01-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1264249A true GB1264249A (en) | 1972-02-16 |
Family
ID=25148692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1264249D Expired GB1264249A (en) | 1969-01-08 | 1969-12-09 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS50877B1 (en) |
| CH (1) | CH499309A (en) |
| DE (1) | DE1955621B2 (en) |
| FR (1) | FR2027898A1 (en) |
| GB (1) | GB1264249A (en) |
-
1969
- 1969-10-31 DE DE19691955621 patent/DE1955621B2/en active Granted
- 1969-12-09 GB GB1264249D patent/GB1264249A/en not_active Expired
- 1969-12-19 CH CH1896369A patent/CH499309A/en not_active IP Right Cessation
- 1969-12-22 FR FR6944509A patent/FR2027898A1/fr not_active Withdrawn
- 1969-12-27 JP JP44104873A patent/JPS50877B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1955621C3 (en) | 1974-10-03 |
| DE1955621A1 (en) | 1970-07-16 |
| FR2027898A1 (en) | 1970-10-02 |
| DE1955621B2 (en) | 1974-03-07 |
| CH499309A (en) | 1970-11-30 |
| JPS50877B1 (en) | 1975-01-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |