GB191022949A - Improvements in Trial Frames for Bio-focal Glasses. - Google Patents

Improvements in Trial Frames for Bio-focal Glasses.

Info

Publication number
GB191022949A
GB191022949A GB191022949DA GB191022949A GB 191022949 A GB191022949 A GB 191022949A GB 191022949D A GB191022949D A GB 191022949DA GB 191022949 A GB191022949 A GB 191022949A
Authority
GB
United Kingdom
Prior art keywords
rings
bio
trial
trial frames
glasses
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
Inventor
Frederick Goodell Blanchard
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
Application granted granted Critical
Publication of GB191022949A publication Critical patent/GB191022949A/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
    • A61B3/02—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
    • A61B3/04—Trial frames; Sets of lenses for use therewith

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)
  • Eyeglasses (AREA)

Abstract

22,949. Blanchard, F. G. Oct. 18, 1909, [Convention date]. Sight-testing apparatus. - Trial rings 1 for use in testing for bifocal glasses are made as entire or nearly entire rings with other similar rings 2 fixed or arranged interiorly and eccentrically to them, but in the same plane, to hold the small lenses 3. The rings are made of grooved wire, or are stamped up from sheetmetal.
GB191022949D 1909-10-18 1910-10-04 Improvements in Trial Frames for Bio-focal Glasses. Expired GB191022949A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US191022949XA 1909-10-18 1909-10-18

Publications (1)

Publication Number Publication Date
GB191022949A true GB191022949A (en) 1911-04-06

Family

ID=34377855

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191022949D Expired GB191022949A (en) 1909-10-18 1910-10-04 Improvements in Trial Frames for Bio-focal Glasses.

Country Status (1)

Country Link
GB (1) GB191022949A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016012712A1 (en) * 2014-07-22 2016-01-28 Chouraki Alexandre Gilbert Testing system for varifocal lenses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016012712A1 (en) * 2014-07-22 2016-01-28 Chouraki Alexandre Gilbert Testing system for varifocal lenses
FR3024026A1 (en) * 2014-07-22 2016-01-29 Alexandre Gilbert Chouraki TEST SYSTEM FOR PROGRESSIVE GLASSES

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