GB524822A - Means for testing and assisting abnormal vision - Google Patents
Means for testing and assisting abnormal visionInfo
- Publication number
- GB524822A GB524822A GB413639A GB413639A GB524822A GB 524822 A GB524822 A GB 524822A GB 413639 A GB413639 A GB 413639A GB 413639 A GB413639 A GB 413639A GB 524822 A GB524822 A GB 524822A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- testing
- cell
- fitted
- spectacle frame
- 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
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/04—Trial frames; Sets of lenses for use therewith
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
524,822. Sight-testing: spectacles. BARRETT, C. D., and LONDON OPTICAL CO., Ltd. Feb. 8, 1939, No. 4136. [Class 97 (i)] Subnormal visual acuity and other abnormal vision is tested by means of a trial frame housing in its front cell 4 a rear flange 8 on a cylinder 7 carrying the positive lens 9 of a galilean telescope, and, in its rear cell 6 a negative lens 10 interchangeable with others for the purpose of test; a diaphragm forming one of a series having apertures of various sizes and shapes may be housed in the middle cell 5 or held close to the lens 10. A monocular may be built up with lenses of power and spacing in accordance with the test result, and may comprise a cylindrical body 11 having a flange 14 capable of being fitted in the eye-rim of a spectacle frame, a positive lens 9a, a negative lens 10a, and, if desired, an aperture plate 15 : the lens 10a and plate 15 may be held against one or more shoulders in the body by a ring 13 screwed in place. Cylindrical correction may be determined, and applied to the lens 10a. The body may be extensible, and the spectacle frame may be fitted with one or two of the monoculars.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB413639A GB524822A (en) | 1939-02-08 | 1939-02-08 | Means for testing and assisting abnormal vision |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB413639A GB524822A (en) | 1939-02-08 | 1939-02-08 | Means for testing and assisting abnormal vision |
Publications (1)
Publication Number | Publication Date |
---|---|
GB524822A true GB524822A (en) | 1940-08-15 |
Family
ID=9771428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB413639A Expired GB524822A (en) | 1939-02-08 | 1939-02-08 | Means for testing and assisting abnormal vision |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB524822A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4220402A (en) * | 1978-01-03 | 1980-09-02 | Jannelli Gilbert G | Trial lens eyeglass clip |
DE3624058A1 (en) * | 1986-07-16 | 1988-01-21 | Arnold Dr Med Passow | Diagnostic unit for determining the degree of the oblique deviations in the case of cyclophoria |
EP1318759A1 (en) * | 2000-09-21 | 2003-06-18 | Visx, Inc. | Enhanced wavefront ablation system |
-
1939
- 1939-02-08 GB GB413639A patent/GB524822A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4220402A (en) * | 1978-01-03 | 1980-09-02 | Jannelli Gilbert G | Trial lens eyeglass clip |
DE3624058A1 (en) * | 1986-07-16 | 1988-01-21 | Arnold Dr Med Passow | Diagnostic unit for determining the degree of the oblique deviations in the case of cyclophoria |
EP1318759A1 (en) * | 2000-09-21 | 2003-06-18 | Visx, Inc. | Enhanced wavefront ablation system |
EP1318759A4 (en) * | 2000-09-21 | 2007-03-21 | Visx Inc | Enhanced wavefront ablation system |
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