GB431256A - Improvements in devices for adjusting an eye to be examined - Google Patents

Improvements in devices for adjusting an eye to be examined

Info

Publication number
GB431256A
GB431256A GB8327/35A GB832735A GB431256A GB 431256 A GB431256 A GB 431256A GB 8327/35 A GB8327/35 A GB 8327/35A GB 832735 A GB832735 A GB 832735A GB 431256 A GB431256 A GB 431256A
Authority
GB
United Kingdom
Prior art keywords
eye
examined
diaphragms
lenses
imaging
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
GB8327/35A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB431256A publication Critical patent/GB431256A/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
    • A61B3/024—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for determining the visual field, e.g. perimeter types

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)
  • Eye Examination Apparatus (AREA)

Abstract

431,256. Sight - - testing apparatus. ZEISS, C., [Firm of], Carl-Zeiss-Strasse, Jena, Germany. March 18, 1935, No. 8327. Convention date, March 24, 1934. [Class 97 (i)] A device for use in adjusting the position of an eye to be examined by a sighttesting apparatus such as a perimeter, consists of two optical systems each producing on the eye to be examined a real image of a diaphragm &c., the two pencils of imaging rays being so directed as to intersect in the image plane. The apparatus shown consists of a tube 1 containing a source of light 2, lenses 3, 3<1> and diaphragms 4, 4<1> adjacent the lenses. The ends of the tube are provided with heads 5, 5<1> carrying lenses 6, 6' and reflectors 7, 71 for imaging the diaphragms on the eye, the reflectors being adjustable to cause the two imaging ray pencils to intersect in the image plane. The diaphragms may have the form shown in Figs. 3 and 4, the image formed on the eye then consisting of two concentric rings.
GB8327/35A 1934-03-24 1935-03-18 Improvements in devices for adjusting an eye to be examined Expired GB431256A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE431256X 1934-03-24

Publications (1)

Publication Number Publication Date
GB431256A true GB431256A (en) 1935-07-03

Family

ID=6485695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8327/35A Expired GB431256A (en) 1934-03-24 1935-03-18 Improvements in devices for adjusting an eye to be examined

Country Status (1)

Country Link
GB (1) GB431256A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039675A1 (en) * 1996-04-22 1997-10-30 Moorfields Eye Hospital Ophthalmic apparatus and test method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997039675A1 (en) * 1996-04-22 1997-10-30 Moorfields Eye Hospital Ophthalmic apparatus and test method

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