GB575595A - Improvements in a centrometer for measuring the relative location of human eyes - Google Patents

Improvements in a centrometer for measuring the relative location of human eyes

Info

Publication number
GB575595A
GB575595A GB581444A GB581444A GB575595A GB 575595 A GB575595 A GB 575595A GB 581444 A GB581444 A GB 581444A GB 581444 A GB581444 A GB 581444A GB 575595 A GB575595 A GB 575595A
Authority
GB
United Kingdom
Prior art keywords
lines
discs
principal
centre
centrometer
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
GB581444A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB581444A priority Critical patent/GB575595A/en
Publication of GB575595A publication Critical patent/GB575595A/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
    • A61B3/11—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for measuring interpupillary distance or diameter of pupils

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)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

575,595. Sight - testing apparatus. GLAZER, W. H. March 29, 1944, No. 5814. [Class 97 (i)] In an apparatus for testing eyes comprising a frame for supporting transparent discs and having means for moving the discs vertically or horizontally, the discs are provided with scales having mutually perpendicular lines coinciding with the principal diameters and a plurality of dividing lines parallel to one of said principal diameters for determining the relative position of the centre of each eye. As shown, discs A and B having five lines 14 at 2 mm. interval on either side of the principal diameter 12 are supported in a trial frame C in which they may be rotated or moved vertically or horizontally. By setting the lines vertically the interpupillary distances may be obtained, or with the lines horizontal any difference in the height of the pupils may be measured. In a modification, Fig. 4 (not shown), an opaque bar on the scale is used to find the position of the centre of the reading portion of a bifocal lens.
GB581444A 1944-03-29 1944-03-29 Improvements in a centrometer for measuring the relative location of human eyes Expired GB575595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB581444A GB575595A (en) 1944-03-29 1944-03-29 Improvements in a centrometer for measuring the relative location of human eyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB581444A GB575595A (en) 1944-03-29 1944-03-29 Improvements in a centrometer for measuring the relative location of human eyes

Publications (1)

Publication Number Publication Date
GB575595A true GB575595A (en) 1946-02-25

Family

ID=9803108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB581444A Expired GB575595A (en) 1944-03-29 1944-03-29 Improvements in a centrometer for measuring the relative location of human eyes

Country Status (1)

Country Link
GB (1) GB575595A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188442A (en) * 1986-03-26 1987-09-30 Kenneth Robert Conrad Segment height measuring device for eyeglasses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2188442A (en) * 1986-03-26 1987-09-30 Kenneth Robert Conrad Segment height measuring device for eyeglasses
GB2188442B (en) * 1986-03-26 1989-11-15 Kenneth Robert Conrad Segment height measuring device for eye glasses

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