GB1108304A - Improvements in ophthalmometers - Google Patents

Improvements in ophthalmometers

Info

Publication number
GB1108304A
GB1108304A GB1251365A GB1251365A GB1108304A GB 1108304 A GB1108304 A GB 1108304A GB 1251365 A GB1251365 A GB 1251365A GB 1251365 A GB1251365 A GB 1251365A GB 1108304 A GB1108304 A GB 1108304A
Authority
GB
United Kingdom
Prior art keywords
line
ophthalmometer
window
target
base
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
GB1251365A
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.)
Guilbert Routit & Cie
Original Assignee
Guilbert Routit & Cie
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 Guilbert Routit & Cie filed Critical Guilbert Routit & Cie
Publication of GB1108304A publication Critical patent/GB1108304A/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
    • A61B3/1035—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes for measuring astigmatism
    • 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
    • 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
    • A61B3/107—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining the shape or measuring the curvature of the cornea

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)
  • Prostheses (AREA)

Abstract

1,108,304. Ophthalmometers. GUILBERT ROUTIT & CIE. March 24, 1965 [March 25, 1964], No. 12513/65. Heading G2J. An ophthalmometer includes a set of two targets which are arranged to be projected on to the cornea of a patient's eye, the first target comprising a rectangular window 3 in which is traced a reference line 4 at right angles to a baseline 5 formed by one edge of the window, and the second target comprising a rectangular window 13 in which is traced a dioptric scale 14 along a base-line 15 formed by one edge of the window 13, the targets being mounted so that the image received through the ophthalmometer eyepiece after reflection at the cornea, appears as the continuous base-line with the reference line 4 registering with the scale 14. Each target further comprises two fiducial lines, 7, 9 or 21, 18 parallel to and equally spaced from the base-line 5 or 15 respectively. The apparatus is rotatable about its optical axis so that a reading may be taken with the ophthalmometer in each of two mutually perpendicular positions. Any difference between the two readings indicates the degree of astigmatism of the eye under examination.
GB1251365A 1964-03-25 1965-03-24 Improvements in ophthalmometers Expired GB1108304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR968630A FR1398062A (en) 1964-03-25 1964-03-25 Ophthalmometer upgrades

Publications (1)

Publication Number Publication Date
GB1108304A true GB1108304A (en) 1968-04-03

Family

ID=8826325

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1251365A Expired GB1108304A (en) 1964-03-25 1965-03-24 Improvements in ophthalmometers

Country Status (5)

Country Link
BE (1) BE660793A (en)
CH (1) CH423295A (en)
DE (1) DE1951703U (en)
FR (1) FR1398062A (en)
GB (1) GB1108304A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123977A (en) * 1982-07-03 1984-02-08 Smith & Nephew Ass Ophthalmic test apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123977A (en) * 1982-07-03 1984-02-08 Smith & Nephew Ass Ophthalmic test apparatus

Also Published As

Publication number Publication date
DE1951703U (en) 1966-12-15
BE660793A (en) 1965-07-01
FR1398062A (en) 1965-05-07
CH423295A (en) 1966-10-31

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