EP1555932A1 - Appareil ophtalmologique et procede de positionnement associe - Google Patents

Appareil ophtalmologique et procede de positionnement associe

Info

Publication number
EP1555932A1
EP1555932A1 EP03778289A EP03778289A EP1555932A1 EP 1555932 A1 EP1555932 A1 EP 1555932A1 EP 03778289 A EP03778289 A EP 03778289A EP 03778289 A EP03778289 A EP 03778289A EP 1555932 A1 EP1555932 A1 EP 1555932A1
Authority
EP
European Patent Office
Prior art keywords
eye
unit
ophthalmic device
eye tracker
positioning
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.)
Ceased
Application number
EP03778289A
Other languages
German (de)
English (en)
Inventor
Oliver Baumann
Michael Claus
Axel Doering
Ingo Koschmieder
Thomas Schulze
Bernd Spruck
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 Meditec AG
Original Assignee
Carl Zeiss Meditec 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 Meditec AG filed Critical Carl Zeiss Meditec AG
Publication of EP1555932A1 publication Critical patent/EP1555932A1/fr
Ceased 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
    • A61B3/113—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining or recording eye movement

Definitions

  • the present invention relates to an arrangement and a method for automatically positioning the device with respect to the patient's eye to be examined in x, y and / or z coordinates.
  • This method can be used advantageously to simplify the determination of the biometric data of the eye as well as other diagnostically and therapeutically relevant settings on the basis of manual or stored method sequences. Data from an examination can be stored in order to examine the corresponding areas under the same conditions during a later re-examination and thus to be able to determine changes.
  • Patent specification EP 1 088 511 describes an ophthalmic device which has a positioning unit for aligning the measuring unit with respect to the eye to be examined.
  • a detection unit which determines the position of the measuring unit relative to the eye and controls it during the measurement. The determined measured values are stored or discarded as a function of the eye position determined by the detection unit.
  • a disadvantage of this solution in comparison to the method proposed here is the fact that the measuring unit of the ophthalmic device at the beginning of the examination, ie when the patient has sat in front of the device and brought his eye into a fixed position, by the operator using a joystick must be aligned. Only after this rough adjustment can the detection unit determine the position of the eye and send the corresponding signals to the positioning unit for fine adjustment. That means the process is subject subjective influences such as the experience of the operator when setting.
  • the position of the eyes is also determined by illuminating the eyes and then evaluating the reflected radiation.
  • the photodetectors receive the radiation emitted by the respective associated radiation emitter and reflected by the eye.
  • a controller analyzes the data from the photodetectors, which are designed as 4-quadrant photodetectors, in order to determine the exact position of the eye.
  • This technical solution particularly determines the focus position, i. H. the exact distance of the eye from the optics of the device.
  • the present invention has for its object to develop an ophthalmic device and a method for its control, in which the subjective sources of error in the alignment of the device on the optical axis of the eye are minimized, so that the measured values to be determined are accurate and reliable.
  • a rough setting by the operator should no longer be necessary.
  • the structure and applicability of the device should not be significantly more complicated.
  • the ophthalmic device for determining biometric data of an eye is widely used both in medical practices and in opticians.
  • the automatic positioning saves a considerable amount of time.
  • light marks and patterns are already created using the eye tracker units
  • Eye movement tracked so that their use for eye detection does not represent an increased or more complicated outlay on equipment.
  • Figure 1 a schematic representation of an ophthalmic device with means for positioning
  • FIG. 1 An ophthalmological device, for example for determining biometric data of an eye, is shown schematically in FIG. 1 and consists of a preferably digitally controllable illumination unit 1 and a stereomicroscope 2 serving as an observation system with different magnifications, which are pivotably arranged independently of one another on separate support arms 3a and 3b are.
  • a special eye tracker unit 8 is connected to an associated IR lighting unit, which operates synchronously with the frame rate of the eye tracker unit 8, and to a central control unit 6 for recording, processing and storing the data.
  • the IR lighting guarantees that the actual high-resolution digital recording camera cannot be influenced in the VIS area.
  • the camera and eye tracker beam paths are thus optically spectrally separated and cannot influence each other.
  • a suitable IR bandpass filter is provided for the eye tracker unit 8, which is only permeable to the light of the IR illumination unit.
  • Lighting unit 1 is provided with an IR cut filter so that no IR light is emitted.
  • the optical coupling of high-resolution digital camera and eye tracker unit 8 takes place via one or more coupling system (s) 5.
  • the central control unit 6 has a user interface and has connections to a monitor 7 and / or printer serving as an output unit Eye tracker unit 8 and means for relative positioning of the ophthalmic device with respect to the eye 12 of the patient 11.
  • the eye tracker unit 8 has an imaging system with at least two settings for different opening angles.
  • the control unit 6 also has a user interface with input devices, such as keyboard 9, mouse 10, trackball, joystick or the like, via which various control and evaluation modes can be called up.
  • the image recording unit 4 preferably has a device for tilting the camera chip for correction according to the Scheimpflug principle with respect to the optical axis 15 and is able to record image sequences.
  • Figure 2 shows the schematic representation of a slit lamp with means for device positioning in a plan view.
  • the signal from the eye tracker unit 8 is also used to detect the position of the eye 12 to be examined, in addition to tracking a measurement mark and / or grating structure projected onto the eye 12 used with respect to the optical axis 15 of the ophthalmic device.
  • the eye 12 of the patient 11 is brought into a fixed position by the existing chin rest 13 and forehead rest 14.
  • the eye tracker unit 8 consists of a camera and IR illumination, which is coupled in, for example, by a beam splitter.
  • the uniform field projected onto the eye 12 by the IR illumination is reflected by the latter and produces an image of the eye 12.
  • the eye tracker unit 8 delivers signals in evaluation of this image, which signals the position of the pupil center exactly define.
  • the objective has a correspondingly large opening angle of approximately 45 ° at a distance of approximately 100 mm from the eye 12.
  • Positioning unit generated and supplied to this.
  • the actuators are controlled using the setpoint.
  • an actuator 16 is provided for each of the three coordinate directions.
  • the difference between the center of the eye 12 and the optical axis 15 of the ophthalmic device is adjusted to zero by relative movement and constant control by the eye tracker unit 8. This is possible because the eye tracker unit 8 has a high measurement repetition rate and supplies the exact coordinates of the pupil center several times per second. After alignment in the x and y directions, the lens setting of the imaging system of the eye tracker unit 8 can be changed in order to use z. B. higher accuracy
  • the eye tracker unit 8 is expediently connected to the optical axis 15 of the observation system 2, as a result of which a possible parallax need not be taken into account.
  • the positioning process is triggered by a release button, a pulse generator on the forehead rest 14, the chin rest 15 or the like. Furthermore, it is possible to position the ophthalmic device automatically on the other eye of the patient after the end of the examinations and / or measurements or by pressing a button. After treating a patient, the ophthalmic device can be moved into a basic position. For the next patient, the device is either aligned automatically to the specified eye to be examined first, or the control unit is informed of which eye the positioning should take place on. However, it is also conceivable that the ophthalmic device remains in the last position after the treatment of a patient. The control unit can be informed to the next patient which eye the alignment should take place on, or the examination begins with the eye of the previous patient last examined eye.
  • ophthalmic device With the ophthalmic device according to the invention, a solution is proposed which enables the entire device to be automatically positioned with respect to the eye to be examined. As a result, both the examination and the determination of the biometric data of an eye can be simplified and significantly accelerated. Apart from the actuators, no further technical means are required, so that the structure of the overall device does not become more complicated and confusing. Fundus cameras and slit lamps, for example, are conceivable as ophthalmic devices.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Biophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Biomedical Technology (AREA)
  • Human Computer Interaction (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Eye Examination Apparatus (AREA)

Abstract

L'invention concerne un ensemble et un procédé pour positionner un appareil relativement à l'oeil d'un patient à examiner sur des coordonnées x, y et/ou z. Cet appareil ophtalmologique comporte une unité d'éclairage réglable, un système d'observation, une unité de prise de vues, une unité de commande centrale, une unité de sortie, un suiveur oculaire et des moyens de positionnement. Le système de reproduction du suiveur oculaire est doté d'au moins deux possibilités d'agrandissements réglables. Selon le procédé pour positionner l'appareil ophtalmologique, le signal du suiveur oculaire sert non seulement à suivre une marque de mesure et/ou une structure réticulaire projetée sur l'oeil, mais aussi à saisir la position de l'oeil du patient par rapport à l'axe optique de l'appareil ophtalmologique. L'appareil ophtalmologique selon l'invention permet de positionner automatiquement l'ensemble de l'appareil relativement à l'oeil à examiner, ce qui simplifie et accélère notablement à la fois l'examen et la détermination des données biométriques de l'oeil.
EP03778289A 2002-10-28 2003-10-28 Appareil ophtalmologique et procede de positionnement associe Ceased EP1555932A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10250569 2002-10-28
DE10250569A DE10250569A1 (de) 2002-10-28 2002-10-28 Ophthalmologisches Gerät und Verfahren zur Gerätepositionierung
PCT/EP2003/011925 WO2004037077A1 (fr) 2002-10-28 2003-10-28 Appareil ophtalmologique et procede de positionnement associe

Publications (1)

Publication Number Publication Date
EP1555932A1 true EP1555932A1 (fr) 2005-07-27

Family

ID=32103181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03778289A Ceased EP1555932A1 (fr) 2002-10-28 2003-10-28 Appareil ophtalmologique et procede de positionnement associe

Country Status (5)

Country Link
US (1) US7413305B2 (fr)
EP (1) EP1555932A1 (fr)
JP (1) JP2006503625A (fr)
DE (1) DE10250569A1 (fr)
WO (1) WO2004037077A1 (fr)

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ES2433868T3 (es) * 2006-04-13 2013-12-12 Manuele Casale Aparato y procedimiento para mediciones videorinohigrométricas (VRI - Volumen de Reserva Inspiratorio)
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US8257274B2 (en) 2008-09-25 2012-09-04 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
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US8781548B2 (en) 2009-03-31 2014-07-15 Covidien Lp Medical sensor with flexible components and technique for using the same
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DE102010050695A1 (de) 2010-11-06 2012-05-10 Carl Zeiss Meditec Ag Anordnung und Verfahren zur automatischen Grobpositionierung ophthalmologischer Geräte
DE102012019463A1 (de) 2012-09-28 2014-04-03 Carl Zeiss Meditec Ag Vorrichtung und Verfahren zur automatischen Grobpositionierung des Messkopfes eines ophthalmologischen Gerätes
DE102013103971A1 (de) 2013-04-19 2014-11-06 Sensovation Ag Verfahren zum Erzeugen eines aus mehreren Teilbildern zusammengesetzten Gesamtbilds eines Objekts
US10007102B2 (en) 2013-12-23 2018-06-26 Sakura Finetek U.S.A., Inc. Microscope with slide clamping assembly
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DE102015008217A1 (de) 2015-06-29 2016-12-29 Precitec Optronik Gmbh Verfahren und Vorrichtung zur Bestimmung der Position und der Lage eines Auges
DE202016006265U1 (de) 2016-09-30 2017-03-20 Carl Zeiss Meditec Ag Vorrichtung zur Fixierung eines Patientenkopfes für ophthalmologische Geräte
US11280803B2 (en) 2016-11-22 2022-03-22 Sakura Finetek U.S.A., Inc. Slide management system
ES2781794B2 (es) * 2019-03-04 2021-04-14 Consejo Superior Investig Cientificas Aparato y sistema para realizar medidas optometricas y metodo para ajustar la potencia optica de una lente ajustable
EP4076140A1 (fr) * 2019-12-19 2022-10-26 Occyo GmbH Ophtalmoscope destinée à l'examen des yeux

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Also Published As

Publication number Publication date
DE10250569A1 (de) 2004-05-13
US7413305B2 (en) 2008-08-19
JP2006503625A (ja) 2006-02-02
US20060146283A1 (en) 2006-07-06
WO2004037077A1 (fr) 2004-05-06

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