IT1285468B1 - Proiettore di ottotipi a contrasto variabile - Google Patents

Proiettore di ottotipi a contrasto variabile

Info

Publication number
IT1285468B1
IT1285468B1 IT96BO000084A ITBO960084A IT1285468B1 IT 1285468 B1 IT1285468 B1 IT 1285468B1 IT 96BO000084 A IT96BO000084 A IT 96BO000084A IT BO960084 A ITBO960084 A IT BO960084A IT 1285468 B1 IT1285468 B1 IT 1285468B1
Authority
IT
Italy
Prior art keywords
variable contrast
projector
contrast optotype
optotype projector
variable
Prior art date
Application number
IT96BO000084A
Other languages
English (en)
Inventor
Sergio Mura
Original Assignee
C S O Srl
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 C S O Srl filed Critical C S O Srl
Priority to IT96BO000084A priority Critical patent/IT1285468B1/it
Publication of ITBO960084A0 publication Critical patent/ITBO960084A0/it
Priority to DE69634475T priority patent/DE69634475T2/de
Priority to AT96109751T priority patent/ATE290815T1/de
Priority to EP96109751A priority patent/EP0791325B1/en
Priority to JP8204133A priority patent/JPH09265134A/ja
Priority to US08/735,016 priority patent/US5835191A/en
Publication of ITBO960084A1 publication Critical patent/ITBO960084A1/it
Application granted granted Critical
Publication of IT1285468B1 publication Critical patent/IT1285468B1/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)
  • Molecular Biology (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Biophysics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Projection Apparatus (AREA)
  • Eye Examination Apparatus (AREA)
  • Apparatus For Making Beverages (AREA)
IT96BO000084A 1996-02-23 1996-02-23 Proiettore di ottotipi a contrasto variabile IT1285468B1 (it)

Priority Applications (6)

Application Number Priority Date Filing Date Title
IT96BO000084A IT1285468B1 (it) 1996-02-23 1996-02-23 Proiettore di ottotipi a contrasto variabile
DE69634475T DE69634475T2 (de) 1996-02-23 1996-06-18 Optotypen-Projektor mit variablem Kontrast
AT96109751T ATE290815T1 (de) 1996-02-23 1996-06-18 Optotypen-projektor mit variablem kontrast
EP96109751A EP0791325B1 (en) 1996-02-23 1996-06-18 Projector of optotypes with variable contrast
JP8204133A JPH09265134A (ja) 1996-02-23 1996-07-16 可変コントラストの光学文字プロジェクタ−
US08/735,016 US5835191A (en) 1996-02-23 1996-10-22 Optotype projector apparatus with variable contrast

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96BO000084A IT1285468B1 (it) 1996-02-23 1996-02-23 Proiettore di ottotipi a contrasto variabile
US08/735,016 US5835191A (en) 1996-02-23 1996-10-22 Optotype projector apparatus with variable contrast

Publications (3)

Publication Number Publication Date
ITBO960084A0 ITBO960084A0 (it) 1996-02-23
ITBO960084A1 ITBO960084A1 (it) 1997-08-23
IT1285468B1 true IT1285468B1 (it) 1998-06-08

Family

ID=26330334

Family Applications (1)

Application Number Title Priority Date Filing Date
IT96BO000084A IT1285468B1 (it) 1996-02-23 1996-02-23 Proiettore di ottotipi a contrasto variabile

Country Status (4)

Country Link
US (1) US5835191A (it)
EP (1) EP0791325B1 (it)
JP (1) JPH09265134A (it)
IT (1) IT1285468B1 (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6652102B2 (en) 2000-10-20 2003-11-25 Nidek Co., Ltd Visual function test apparatus
CN103654708B (zh) * 2013-11-14 2015-10-21 深圳市斯尔顿科技有限公司 一种手持视力检测装置
CN114820513B (zh) * 2022-04-25 2024-07-26 深圳市迪佳极视智能科技有限公司 视力检测方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1047350A (it) * 1900-01-01
US3684355A (en) * 1970-07-02 1972-08-15 Biometrics Inc Glare susceptibility tester
US4155632A (en) * 1976-02-26 1979-05-22 Acadia Associates Method and apparatus for testing vision
US4572630A (en) * 1984-03-01 1986-02-25 The United States Of America As Represented By The Secretary Of The Air Force Variable contrast direct read-out vision tester
US4861156A (en) * 1984-10-31 1989-08-29 Terry Clifford M Visual acuity testing system
US5121981A (en) * 1987-11-03 1992-06-16 Mentor O & O, Inc. Visual acuity tester
CA2027781A1 (en) * 1989-10-20 1991-04-21 Bosko Jovicevic Method and apparatus for examination of visual acuity

Also Published As

Publication number Publication date
JPH09265134A (ja) 1997-10-07
ITBO960084A0 (it) 1996-02-23
EP0791325A1 (en) 1997-08-27
US5835191A (en) 1998-11-10
ITBO960084A1 (it) 1997-08-23
EP0791325B1 (en) 2005-03-16

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Legal Events

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0001 Granted