IT1015381B - Dispositivo per la proiezione di test su uno schermo in particolare test d esame della visione - Google Patents

Dispositivo per la proiezione di test su uno schermo in particolare test d esame della visione

Info

Publication number
IT1015381B
IT1015381B IT24398/74A IT2439874A IT1015381B IT 1015381 B IT1015381 B IT 1015381B IT 24398/74 A IT24398/74 A IT 24398/74A IT 2439874 A IT2439874 A IT 2439874A IT 1015381 B IT1015381 B IT 1015381B
Authority
IT
Italy
Prior art keywords
tests
projection
screen
vision test
particular vision
Prior art date
Application number
IT24398/74A
Other languages
English (en)
Original Assignee
Essilor Int
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Essilor Int filed Critical Essilor Int
Application granted granted Critical
Publication of IT1015381B publication Critical patent/IT1015381B/it

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)
IT24398/74A 1973-06-29 1974-06-25 Dispositivo per la proiezione di test su uno schermo in particolare test d esame della visione IT1015381B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7323859A FR2235627A5 (it) 1973-06-29 1973-06-29

Publications (1)

Publication Number Publication Date
IT1015381B true IT1015381B (it) 1977-05-10

Family

ID=9121777

Family Applications (1)

Application Number Title Priority Date Filing Date
IT24398/74A IT1015381B (it) 1973-06-29 1974-06-25 Dispositivo per la proiezione di test su uno schermo in particolare test d esame della visione

Country Status (6)

Country Link
US (1) US3947098A (it)
JP (1) JPS5323160B2 (it)
DE (1) DE2431263C3 (it)
FR (1) FR2235627A5 (it)
GB (1) GB1448755A (it)
IT (1) IT1015381B (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JP4970122B2 (ja) * 2007-04-20 2012-07-04 株式会社ニデック 視力検査装置
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DE2431263B2 (de) 1977-09-01
FR2235627A5 (it) 1975-01-24
JPS5037293A (it) 1975-04-07
GB1448755A (en) 1976-09-08
DE2431263A1 (de) 1975-01-23
US3947098A (en) 1976-03-30
JPS5323160B2 (it) 1978-07-13
DE2431263C3 (de) 1978-04-20

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