DE921597C - Retinoscopy mirror - Google Patents

Retinoscopy mirror

Info

Publication number
DE921597C
DE921597C DES30993A DES0030993A DE921597C DE 921597 C DE921597 C DE 921597C DE S30993 A DES30993 A DE S30993A DE S0030993 A DES0030993 A DE S0030993A DE 921597 C DE921597 C DE 921597C
Authority
DE
Germany
Prior art keywords
mirror
retinoscopy
light
eye
partially translucent
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
DES30993A
Other languages
German (de)
Inventor
Heinrich Dr Med Sachtleben
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 DES30993A priority Critical patent/DE921597C/en
Application granted granted Critical
Publication of DE921597C publication Critical patent/DE921597C/en
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/12Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
    • A61B3/1208Multiple lens hand-held instruments

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)

Description

Zur Skiaskopie (Schattenprobe) verwendet man meist vollreflektierende Spiegel mit mittiger Bohrung zum Durchschauen für die Pupille des Untersuchers. Diese sind nachteilig, weil gerade im Hauptmeßpunkt, wenn sich die Pupille des Beobachters im Fernpunkt des Auges des Untersuchten abbildet, die lichtverschluckende Bohrung sich scharf in demjenigen Punkt der Netzhaut des Untersuchten befindet, von dem eigentlich das Licht ausgehen müßte, um dessen Bildumschlag beobachten zu können. Daher fällt der Hauptmeßpunkt mit einem Lichtminimum zusammen. Fully reflective ones are mostly used for retinoscopy (shadow samples) Mirror with central hole to see through for the examiner's pupil. These are disadvantageous because it is precisely in the main measuring point when the observer's pupil is shows the light-absorbing hole in the far point of the eye of the examined person is sharp in that point of the retina of the subject from which actually the light would have to go out in order to be able to observe its image change. Therefore the main measuring point coincides with a light minimum.

Zur Abhilfe dieser Erscheinung sind Skiaskopierspiegel bekannt, welche einen Teil des Lichtes hindurchlassen, einen anderen reflektieren, so daß die lichtverschluckende Bohrung entfällt. To remedy this phenomenon, retinoscopy mirrors are known which Let part of the light pass through, reflect another, so that the light-swallowing Drill-hole not applicable.

Erreicht wird das durch eine oder mehrere parallele Glasplatten, die nur vermöge ihrer Grenzflächen gegen Luft oder vermöge einer sehr dünnen Metallauflage reflektieren.This is achieved through one or more parallel glass plates that only by virtue of their interfaces with air or by virtue of a very thin metal layer reflect.

Hierbei fällt der Hauptmeßpunkt zwar mit einem vorteilhaften Helligkeitsmaximum zusammen, aber die verringerte Lichtstärke des vom Beobachter auf das Auge des Untersuchten zu leitenden Spiegelreflexlichtes erschwert die rasche Einstellung des Spiegels ungemein. In this case, the main measuring point does indeed fall with an advantageous maximum brightness together, but the reduced light intensity from the observer to the eye of the examined Mirror reflex light that has to be guided makes it difficult to adjust the mirror quickly immensely.

Durch die Erfindung wird dieser vorerwähnte Nachteil eines Skiaskopierspiegels mit einem teilweise lichtdurchlässigen Spiegel dadurch vermieden, daß zusätzlich auf dem Spiegel außerhalb seines zur Spiegelung der Lichtstrahlen ins Auge benötigten Bezirks und konzentrisch dazu eine Vollverspiegelung zur Verstärkung der Lichtreflexion aufgebracht ist. Dieser so ausgestattete Skiaskopierspiegel eignet sich sowohl als einfacher Handspiegel mit Griff üblicher Art als auch in Verbindung mit einem elektrisch angeschlossenen Skiaskop (Retinoskop). The invention eliminates the aforementioned disadvantage of a retinoscopy mirror with a partially translucent mirror avoided that in addition on the mirror outside of his needed to reflect the rays of light into the eye District and concentric to it a full mirroring to intensify the light reflection is upset. This retinoscopy mirror equipped in this way is suitable both as simple hand mirror with handle of the usual type as well as in connection with an electric one connected retinoscope.

Der Erfindungsgedanke ist in der Zeichnung in einem Ausführungsbeispiel wiedergegeben, und zwar zeigt Fig. I eine Draufsicht auf den Skiaskopierspiegel und Fig. 2 eine Seitenansicht dazu, teilweise geschnitten. The idea of the invention is shown in the drawing in one embodiment reproduced, namely Fig. I shows a plan view of the retinoscopy mirror and FIG. 2 is a side view thereof, partly in section.

Der in bekannter Weise aus einer planparallelen Glasplatte I und einer Blechfassung 2 bestehende, teilweise lichtdurchlässige, runde Skiaskopierspiegel besitzt auf der Rückseite erfindungsgemäß eine voll reflektierende Spiegelschicht 3, die ringförmige Gestalt aufweist und zum Mittelpunkt der Glasplatte 1 konzentrisch liegt. Die unmittelbar hinter der Glasplatte I sich befindende geschwärzte Blechfassung 2 weist das mittige Loch 4 auf, dessen Durchmesser der Pupillenweite des Beobachters bei Dunkeladaptation entspricht. The in a known manner from a plane-parallel glass plate I and a sheet metal frame 2 existing, partially translucent, round retinoscopy mirror has a fully reflective mirror layer on the back according to the invention 3, which has an annular shape and is concentric with the center of the glass plate 1 lies. The blackened sheet metal frame located directly behind the glass plate I. 2 has the central hole 4, the diameter of which is the pupil width of the observer corresponds to dark adaptation.

Claims (1)

PATENTANSPRUCH: Skiaskopierspiegel mit einem teilweise lichtdurchlässigen Spiegel, dadurch gekennzeichnet, daß er außerhalb seines zur Spiegelung der Lichtstrahlen ins Auge benötigten Bezirks und konzentrisch dazu eine Vollverspiegelung (3) aufweist. PATENT CLAIM: Retinoscope mirror with a partially translucent Mirror, characterized in that it is outside of it for reflecting the light rays required in the eye and has a full mirror coating (3) concentrically to it. Angezogene Druckschriften: Deutsche Patentschrift Nr. 60 658. Referenced publications: German patent specification No. 60 658.
DES30993A 1952-11-07 1952-11-07 Retinoscopy mirror Expired DE921597C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES30993A DE921597C (en) 1952-11-07 1952-11-07 Retinoscopy mirror

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES30993A DE921597C (en) 1952-11-07 1952-11-07 Retinoscopy mirror

Publications (1)

Publication Number Publication Date
DE921597C true DE921597C (en) 1954-12-23

Family

ID=7480348

Family Applications (1)

Application Number Title Priority Date Filing Date
DES30993A Expired DE921597C (en) 1952-11-07 1952-11-07 Retinoscopy mirror

Country Status (1)

Country Link
DE (1) DE921597C (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60658C (en) * Dr. A. ROTH, Stabsarzt, in Berlin N.W., Friedrichstr. 140 Measuring device for determining the condition of the eye break with the shadow sample without calculation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60658C (en) * Dr. A. ROTH, Stabsarzt, in Berlin N.W., Friedrichstr. 140 Measuring device for determining the condition of the eye break with the shadow sample without calculation

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