EP0163673A1 - Installation pour l'examen du champ de vision (iv) - Google Patents

Installation pour l'examen du champ de vision (iv)

Info

Publication number
EP0163673A1
EP0163673A1 EP19840904106 EP84904106A EP0163673A1 EP 0163673 A1 EP0163673 A1 EP 0163673A1 EP 19840904106 EP19840904106 EP 19840904106 EP 84904106 A EP84904106 A EP 84904106A EP 0163673 A1 EP0163673 A1 EP 0163673A1
Authority
EP
European Patent Office
Prior art keywords
light
point
control unit
examined
person
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.)
Withdrawn
Application number
EP19840904106
Other languages
German (de)
English (en)
Inventor
Hannelore Wieczorek
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.)
Optische Werke G Rodenstock
Original Assignee
Optische Werke G Rodenstock
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 Optische Werke G Rodenstock filed Critical Optische Werke G Rodenstock
Publication of EP0163673A1 publication Critical patent/EP0163673A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a device for checking the visual field according to the preamble of patent claim 1.
  • Devices for visual field testing of this type are known, for example, from DE-OS 31 35 383 (Rodenstock) or DE-OS 31 35 384 (Rodenstock), the content of which explains the terms used in this application and the general structure and the further prior art is expressly referred to.
  • the intensity of the illuminating light points should be controlled as a function of the defect rate or the interval time as a function of the reaction time.
  • the intensity of the light points presented is increased in accordance with the defect rate, ie the light points that the person to be examined does not see at an intensity adapted to the sensitivity of the eye , and various light points are queried several times depending on whether they are seen or not at increased intensity.
  • the interval time ie the time between the end of the lighting up of the last point of light (a lighting point of light is also referred to below as the light stimulus) and the start of the next presentation, which can be an acute 1 table attention signal for the person to be examined or the light stimulus itself can be increased or decreased depending on whether the reaction time of the person to be examined increases or decreases.
  • reaction time is understood to be the time which elapses between the lighting up of a light point and the “seen” response, which is entered into the control unit, for example, by pressing a key.
  • the invention has for its object to develop a device according to the preamble of claim 1 such that even in difficult subjects to be examined, such as elderly people or children who are unable to follow a program-controlled sequence, properly free test results can be obtained. 5
  • the input unit provided according to the invention enables the operator to switch from one light point presentation to the next manually, ie with any time frame without being linked to an interval time specified by the control, and also to the one just presented Light point arbitrarily to a later one
  • Luminosity that is, presented with what intensity, and the storage of the patient response in association with the location and intensity of the light spot assumes further 5 the control unit of the device according to the invention.
  • the semi-automatic operation allows the operator to concentrate fully on the examination, taking into account patient-specific requirements, such as necessary repetitions in patients with poor understanding or breaks in 15 weak-minded patients, without focusing on the details of the examination, such as storing the answers in Assignment to the individual performances, choice of location and intensity
  • Fig.1 of the drawing shows the basic structure of a
  • Figure 1 is a device 1 schematically, in which the 1
  • Light spots 2 light up, and a block diagram of a control unit 3 is shown.
  • the device 1 has a hemispherical shell 4, which can be raised, and a combined forehead and headrest 5.
  • the light spots 2, which can be light-emitting diodes (LED), for example, and a fixation mark 6, which the person to be examined must fix during the visual field examination, are located on the inner surface of the shell 4.
  • the control unit 3 which is shown in the block diagram, has a microprocessor 7 which is equipped with a write / 5
  • RAM Random access memory
  • ROM read-only memory
  • the microprocessor 7 takes over the control of the light emitting diodes 2 via a control circuit 13.
  • the control circuit 13 has in a known manner an LED current source, an LED decoder and an LED frequency control for varying the intensity of the individual light emitting diodes.
  • a sequence program is stored, according to which the control unit 3 controls the operation of the device according to the invention.
  • the control unit - as described in detail in DE-OS 31 35 383 or DE-OS 31 35 384 - initially leaves the LEDs 2 in a central area of the
  • Light-emitting diodes to determine the intensity at which the examined person "just” sees a point of light and then leaves in further examination steps diodes in the outer area of the visual field as well as diodes not yet scanned in the central area of the visual field 1 light up.
  • An acoustic attention signal can precede the lighting up of a light spot or a light-emitting diode 2; Furthermore, after an acoustic attention signal, no light points can light up in order to test whether the examined person truthfully gives the answer “not seen”.
  • control unit 2 essentially stores the response of the examined person in 0 assignment to the location and the intensity of the illuminating light spot 2 as well as the respective reaction time.
  • the severity of visual field defects can be, for example, the display unit 10 which has a light-emitting diode field
  • the input unit 12 not only has, in a manner known per se, keys for starting the program, for selecting certain program parts and for entering person-specific data, and a key with which the examined 0
  • the examined light can be illuminated
  • the training according to the invention has the
  • the operator can also determine that a point of light that has just been illuminated lights up again and / or at a later point in time determined by the operator.
  • This manual intervention option is useful, for example, when the operator determines that the person being examined gives the answer "not seen” at a point of light which he should actually see due to the fact that visual field positions have not been impaired.

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)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

Installation pour l'examen du champ de vision au moyen d'un dispositif dans lequel s'allument des points lumineux (2) répartis dans le champ de vision d'une personne à examiner. L'installation comporte une unité de commande (3) allumant les points lumineux, la personne à examiner devant donner la réponse "vu" ou "pas vu" par le déclenchement ou le non-déclenchement d'un signal à l'unité de commande (3); celle-ci mémorise la réponse, ainsi que la position et l'intensité dudit point lumineux, tout en déterminant la position. L'intensité du prochain point lumineux, ainsi que le moment où elle va l'allumer. Une unité d'entrée (12) permet à un opérateur de déterminer ou de déclencher, en lieu et place du processus entièrement automatique, le moment où va s'allumer le prochain point lumineux choisi par l'unité de commande, de telle façon que le point lumineux qui vient de s'allumer se rallume et/ou s'allume à un moment ultérieur déterminé par l'opérateur. Avant de rallumer ce point là, il est aussi possible d'allumer d'autres points lumineux dans le champ de vision de la personne à examiner.
EP19840904106 1983-11-15 1984-11-15 Installation pour l'examen du champ de vision (iv) Withdrawn EP0163673A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3341348 1983-11-15
DE19833341348 DE3341348A1 (de) 1983-11-15 1983-11-15 Vorrichtung zur gesichtsfeldpruefung (iv)

Publications (1)

Publication Number Publication Date
EP0163673A1 true EP0163673A1 (fr) 1985-12-11

Family

ID=6214421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840904106 Withdrawn EP0163673A1 (fr) 1983-11-15 1984-11-15 Installation pour l'examen du champ de vision (iv)

Country Status (4)

Country Link
EP (1) EP0163673A1 (fr)
JP (1) JPS61500472A (fr)
DE (1) DE3341348A1 (fr)
WO (1) WO1985002102A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5534953A (en) * 1994-07-01 1996-07-09 Schmielau; Fritz Training device for the therapy of patients having perception defects

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146311A (en) * 1977-05-09 1979-03-27 Synemed, Inc. Automatic visual field mapping apparatus
US4255022A (en) * 1978-10-02 1981-03-10 Baylor College Of Medicine Method of and apparatus for examination of visual fields

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8502102A1 *

Also Published As

Publication number Publication date
DE3341348A1 (de) 1985-05-23
WO1985002102A1 (fr) 1985-05-23
JPS61500472A (ja) 1986-03-20

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI LU NL SE

17P Request for examination filed

Effective date: 19851125

17Q First examination report despatched

Effective date: 19870422

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19890307

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WIECZOREK, HANNELORE