DE244514C - - Google Patents
Info
- Publication number
- DE244514C DE244514C DENDAT244514D DE244514DA DE244514C DE 244514 C DE244514 C DE 244514C DE NDAT244514 D DENDAT244514 D DE NDAT244514D DE 244514D A DE244514D A DE 244514DA DE 244514 C DE244514 C DE 244514C
- Authority
- DE
- Germany
- Prior art keywords
- ring
- slot
- width
- slide
- plate
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 claims description 8
- 230000004304 visual acuity Effects 0.000 claims description 5
- 241000031711 Cytophagaceae Species 0.000 description 1
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
- A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE244514C true DE244514C (en:Method) |
Family
ID=503549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT244514D Active DE244514C (en:Method) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE244514C (en:Method) |
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0
- DE DENDAT244514D patent/DE244514C/de active Active
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