GB947359A - Indicating means for phoropters - Google Patents

Indicating means for phoropters

Info

Publication number
GB947359A
GB947359A GB4196161A GB4196161A GB947359A GB 947359 A GB947359 A GB 947359A GB 4196161 A GB4196161 A GB 4196161A GB 4196161 A GB4196161 A GB 4196161A GB 947359 A GB947359 A GB 947359A
Authority
GB
United Kingdom
Prior art keywords
disc
lens
lenses
rodenstock
powers
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
GB4196161A
Inventor
Winfred Piepenbrink
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 GB4196161A priority Critical patent/GB947359A/en
Publication of GB947359A publication Critical patent/GB947359A/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
    • A61B3/0285—Phoropters

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)
  • Lenses (AREA)

Abstract

947,359. Sight-testing apparatus. R. RODENSTOCK, [trading as OPTISCHE WERKE G. RODENSTOCK]. Nov. 23, 1961, No. 41961/61. Heading G2J. In a phoropter comprising two lens carrying discs, the powers of the lenses carried by disc 2 differ by longer steps (e.g. 3D) than the powers of the lenses in disc 1, each lens of disc 2 has associated therewith a number of calibration marks 211, 212 .... equal to the number of lenses in the other disc 1, and each lens of disc 1 has associated therewith an aperture 121, 122 .... which is so positioned that only that one of the calibration marks associated with a lens on disc 2 is visible which gives the combined power of this lens with the lens on disc 1 that is coincident therewith. This mark will be visible in an aperture of the phoropter housing (not shown).
GB4196161A 1961-11-23 1961-11-23 Indicating means for phoropters Expired GB947359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4196161A GB947359A (en) 1961-11-23 1961-11-23 Indicating means for phoropters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4196161A GB947359A (en) 1961-11-23 1961-11-23 Indicating means for phoropters

Publications (1)

Publication Number Publication Date
GB947359A true GB947359A (en) 1964-01-22

Family

ID=10422170

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4196161A Expired GB947359A (en) 1961-11-23 1961-11-23 Indicating means for phoropters

Country Status (1)

Country Link
GB (1) GB947359A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421592A1 (en) * 1978-04-07 1979-11-02 American Optical Corp REFRACTOR OPTICAL SYSTEM
US4385813A (en) * 1979-01-16 1983-05-31 J. D. Moller Optische Werke Gmbh Phoropter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2421592A1 (en) * 1978-04-07 1979-11-02 American Optical Corp REFRACTOR OPTICAL SYSTEM
US4385813A (en) * 1979-01-16 1983-05-31 J. D. Moller Optische Werke Gmbh Phoropter

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