JPS5037293A - - Google Patents
Info
- Publication number
- JPS5037293A JPS5037293A JP49072727A JP7272774A JPS5037293A JP S5037293 A JPS5037293 A JP S5037293A JP 49072727 A JP49072727 A JP 49072727A JP 7272774 A JP7272774 A JP 7272774A JP S5037293 A JPS5037293 A JP S5037293A
- Authority
- JP
- Japan
- 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.)
- Granted
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
- A61B3/032—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)
- Projection Apparatus (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7323859A FR2235627A5 (ja) | 1973-06-29 | 1973-06-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5037293A true JPS5037293A (ja) | 1975-04-07 |
| JPS5323160B2 JPS5323160B2 (ja) | 1978-07-13 |
Family
ID=9121777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7272774A Expired JPS5323160B2 (ja) | 1973-06-29 | 1974-06-25 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3947098A (ja) |
| JP (1) | JPS5323160B2 (ja) |
| DE (1) | DE2431263C3 (ja) |
| FR (1) | FR2235627A5 (ja) |
| GB (1) | GB1448755A (ja) |
| IT (1) | IT1015381B (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1982641A1 (en) | 2007-04-20 | 2008-10-22 | Nidek Co., Ltd. | Visual Acuity Testing Apparatus |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD245863S (en) | 1976-02-05 | 1977-09-20 | American Optical Corporation | Ophthalmic instrument control board |
| US4161353A (en) * | 1977-07-22 | 1979-07-17 | Herman Centner | Secondary image reproduction device |
| US5302982A (en) * | 1993-02-23 | 1994-04-12 | Woodlyn Inc. | Projector slide apparatus |
| US6425665B2 (en) * | 2000-03-31 | 2002-07-30 | Nidek Co., Ltd. | Visual acuity examination apparatus |
| CN109864698B (zh) * | 2019-04-04 | 2021-06-08 | 河南师范大学 | 一种便携式视力测试仪 |
| CN110244456A (zh) * | 2019-07-16 | 2019-09-17 | 江南大学 | 一种视觉流测量装置及其使用方法 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1797544A (en) * | 1928-05-21 | 1931-03-24 | William J Cameron | Optical apparatus |
| US3655276A (en) * | 1969-10-31 | 1972-04-11 | American Optical Corp | Ophthalmic refracting chart projector |
-
1973
- 1973-06-29 FR FR7323859A patent/FR2235627A5/fr not_active Expired
-
1974
- 1974-06-24 US US05/482,566 patent/US3947098A/en not_active Expired - Lifetime
- 1974-06-25 IT IT24398/74A patent/IT1015381B/it active
- 1974-06-25 JP JP7272774A patent/JPS5323160B2/ja not_active Expired
- 1974-06-27 GB GB2859674A patent/GB1448755A/en not_active Expired
- 1974-06-28 DE DE2431263A patent/DE2431263C3/de not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1982641A1 (en) | 2007-04-20 | 2008-10-22 | Nidek Co., Ltd. | Visual Acuity Testing Apparatus |
| US7784948B2 (en) | 2007-04-20 | 2010-08-31 | Nidek Co., Ltd. | Visual acuity testing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2431263C3 (de) | 1978-04-20 |
| IT1015381B (it) | 1977-05-10 |
| DE2431263B2 (de) | 1977-09-01 |
| US3947098A (en) | 1976-03-30 |
| FR2235627A5 (ja) | 1975-01-24 |
| JPS5323160B2 (ja) | 1978-07-13 |
| GB1448755A (en) | 1976-09-08 |
| DE2431263A1 (de) | 1975-01-23 |