GB1438730A - Method and means for compensating for blink occuring during examination of an eye - Google Patents

Method and means for compensating for blink occuring during examination of an eye

Info

Publication number
GB1438730A
GB1438730A GB1779874A GB1779874A GB1438730A GB 1438730 A GB1438730 A GB 1438730A GB 1779874 A GB1779874 A GB 1779874A GB 1779874 A GB1779874 A GB 1779874A GB 1438730 A GB1438730 A GB 1438730A
Authority
GB
United Kingdom
Prior art keywords
blink
computer
eye
pulse
signal
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
Application number
GB1779874A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tropel Inc
Original Assignee
Tropel Inc
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 Tropel Inc filed Critical Tropel Inc
Publication of GB1438730A publication Critical patent/GB1438730A/en
Expired legal-status Critical Current

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
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
    • 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
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
    • A61B5/1103—Detecting muscular movement of the eye, e.g. eyelid movement
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/7239—Details of waveform analysis using differentiation including higher order derivatives

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physiology (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Pathology (AREA)
  • Eye Examination Apparatus (AREA)
GB1779874A 1973-04-23 1974-04-23 Method and means for compensating for blink occuring during examination of an eye Expired GB1438730A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00353649A US3802768A (en) 1973-04-23 1973-04-23 Blink compensating method for objective refractor for the eye

Publications (1)

Publication Number Publication Date
GB1438730A true GB1438730A (en) 1976-06-09

Family

ID=23389990

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1779874A Expired GB1438730A (en) 1973-04-23 1974-04-23 Method and means for compensating for blink occuring during examination of an eye

Country Status (5)

Country Link
US (1) US3802768A (enExample)
JP (1) JPS5211694A (enExample)
DE (1) DE2417079C2 (enExample)
FR (1) FR2226142B1 (enExample)
GB (1) GB1438730A (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542624A (en) * 1978-09-20 1980-03-26 Canon Kk Automatic eye refraction measuring system
JPS55125843A (en) * 1979-03-20 1980-09-29 Canon Kk Optic refractometer
JPS56156136A (en) * 1980-05-02 1981-12-02 Asahi Optical Co Ltd Apparatus for detecting eye blink during detection
DE3833208C2 (de) * 1988-09-30 1997-03-13 Bron Elektronik Ag Verfahren zur Messung der Blitzdauer eines Blitzgerätes sowie Einrichtung zur Durchführung eines solchen Verfahrens
US6337993B1 (en) * 1997-02-27 2002-01-08 Canon Kabushiki Kaisha Blood flow measuring apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996624A (en) * 1959-08-11 1961-08-15 Victor R Mumma Method for stretching photometer pulses for accurate measurement of pulse height
US3524702A (en) * 1968-09-06 1970-08-18 John G Bellows Apparatus for objectively and automatically refracting the eye

Also Published As

Publication number Publication date
DE2417079C2 (de) 1984-09-20
FR2226142B1 (enExample) 1977-10-14
JPS539478B2 (enExample) 1978-04-06
DE2417079A1 (de) 1974-11-21
US3802768A (en) 1974-04-09
FR2226142A1 (enExample) 1974-11-15
JPS5211694A (en) 1977-01-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee