WO2005058215A1 - Verfahren zur darstellung einer fixiermarke für ophthalmologische behandlungsgeräte - Google Patents
Verfahren zur darstellung einer fixiermarke für ophthalmologische behandlungsgeräte Download PDFInfo
- Publication number
- WO2005058215A1 WO2005058215A1 PCT/EP2004/013675 EP2004013675W WO2005058215A1 WO 2005058215 A1 WO2005058215 A1 WO 2005058215A1 EP 2004013675 W EP2004013675 W EP 2004013675W WO 2005058215 A1 WO2005058215 A1 WO 2005058215A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fixation mark
- fixation
- patient
- movement
- eye
- Prior art date
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
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/032—Devices for presenting test symbols or characters, e.g. test chart projectors
-
- 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
- A61B3/0091—Fixation targets for viewing direction
Definitions
- the present invention relates to a fixation mark which is offered to the patient in order to prevent unwanted eye movements during the treatment of an eye, without having to make greater demands on the patient's ability to concentrate.
- the use of moving fixation marks in ophthalmic devices is already known, but this preferably relates to the determination of the field of view using perimetric arrangements and not the suppression of unwanted eye movements when looking at a rigid fixation object during an examination or treatment.
- DE 31 43 882 describes a method for securing fixation in ophthalmic examination devices, in particular for determining the visual field.
- a fixation point is projected onto a surface lying in the patient's direction of view and coupled with a marking point in order to be able to assign its relative position to the visual field scheme to be determined.
- the fixation point is periodically slowly moved on a predetermined path so that the patient can easily follow this movement.
- the path of the fixing point can for example be a straight line, an elongated ellipse or a circular path.
- the advantageous deflection is +/- 2 ° in the horizontal and +/- 0.2 ° in the vertical direction, with a deflection speed of approximately 2 ° per second.
- the transmission of the current relative position of the fixing point to the check mark in the visual field scheme can be done optically as well as electronically.
- the fixation point and the check mark can be projected by front or rear projection.
- a perimeter in particular a spherical perimeter with a reflective fixation device, is described in DE 41 08 403.
- the examination of the visual field is also carried out here by a fixation mark that is moved periodically relative to the patient. However, the movement takes place through a periodic rotation of the perimeter ball, together with the fixing point rigidly connected to it, about a vertical imaginary axis essentially passing through the eye to be examined.
- the projection of the approximately circular light spots, which can be deflected in two angular degrees, onto any positions of the inner surface of the sphere can be carried out using known electrically controllable systems.
- the determination of the visual field from the results of the examination is not explained in detail.
- 4,995,717 also relates to a device for determining the visual field of a patient.
- a reference mark is placed in the middle of a computer display, on which the patient has to fix his eye.
- light marks are successively displayed on the computer display created to determine the patient's visual field.
- the patient By pressing the mouse button, for example, the patient signals the detectability of the light mark that is currently being displayed.
- the visual field or the existing defects of the examined eye are determined by evaluating the detected light marks.
- fixation control is described in DE 41 08 435, which, although preferably also for devices for visual field examination, can in principle also be used for other ophthalmic examination devices.
- Means are provided for rotating a structured fixation mark about a central axis in order to create a functional and reproducible fixation incentive.
- the fixation mark should only have a structure and preferred direction that the subject can identify when the subject is foveal. This is achieved in that the fixing mark is designed, for example, as a Landolt ring which assumes discrete directional orientations during the rotation.
- a Maltese cross gear generates the discrete directional orientations of the fixation mark in 90 ° rotations with a rest phase from a uniform rotary movement. The subject has to constantly follow the slit of the Landolt ring during the examination, which he can only achieve with appropriate foveal fixation.
- the solutions mentioned are primarily for campimetric analysis, i. H. intended to determine the visual field or defects in the visual field.
- the fixation marks used in treatment devices are usually fixed. Although the duration of laser treatments in ophthalmology is only in the minute range, there are nevertheless unwanted eye movements with fixed fixation marks. This can also not be prevented by the fact that the type, color and / or intensity of the fixing marks are displayed alternately.
- the object of the present invention is to develop a solution with which undesired eye movements of an eye to be treated are prevented or at least minimized.
- the object is achieved by the features of the independent claims. Preferred developments and refinements are the subject of the dependent claims.
- the proposed technical solution relates to a fixation object which can be used both in ophthalmic examination and treatment devices.
- the movable fixation object ensures that the patient aligns his eye with the fixation object and follows it without any problems. Since the patient is busy following the fixation object with the eyes, the risk of looking away is significantly reduced.
- the fixation mark to be displayed is projected into the field of view of the eye to be treated, so that the patient aligns the eye to be treated by foveal focusing on this fixation mark.
- the fixation mark is moved in the patient's field of vision, the movement taking place in such a way that the patient can easily follow the fixation mark.
- the movement of the fixation mark in the patient's field of vision takes place continuously or abruptly, according to a predetermined sequence or depending on chance. This ensures that no unwanted eye movements occur.
- diagnosis or therapy can take place differently. If the fixation mark is moved suddenly in the patient's field of vision, for example, diagnosis or therapy is preferably carried out only in the short resting phases of the fixation mark. In contrast, a diagnosis or therapy can also be carried out with a continuously moving fixation mark while the eye follows the movement of the fixation mark.
- the representation and the movement of the fixation mark can take place, for example, via a display or an XY mirror unit.
- the movement of the diagnosis or Therapy beam should then take place via the same XY mirror unit or be corrected for the movement of the fixation mark.
- a predetermined sequence of movements can also be designed subjectively so dynamically for the patient that there is no fatigue effect.
- the movement of the fixation mark can also be used for the targeted positioning of the eye.
- the diagnostic or therapy beam remains rigid, the beam is positioned on the eye by the eye movement. For this it is necessary that the eye movement can follow the moving fixation mark.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/595,846 US7628488B2 (en) | 2003-12-12 | 2004-12-02 | Method for reproducing a fixation mark for ophthalmological therapeutic equipment |
EP04803428A EP1696844A1 (de) | 2003-12-12 | 2004-12-02 | Verfahren zur darstellung einer fixiermarke für ophthalmologische behandlungsgeräte |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10359239.3 | 2003-12-12 | ||
DE10359239A DE10359239A1 (de) | 2003-12-12 | 2003-12-12 | Verfahren zur Darstellung einer Fixiermarke für ophthalmologische Behandlungsgeräte |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005058215A1 true WO2005058215A1 (de) | 2005-06-30 |
Family
ID=34638724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/013675 WO2005058215A1 (de) | 2003-12-12 | 2004-12-02 | Verfahren zur darstellung einer fixiermarke für ophthalmologische behandlungsgeräte |
Country Status (4)
Country | Link |
---|---|
US (1) | US7628488B2 (de) |
EP (1) | EP1696844A1 (de) |
DE (1) | DE10359239A1 (de) |
WO (1) | WO2005058215A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010017837A1 (de) * | 2010-04-22 | 2011-10-27 | Carl Zeiss Meditec Ag | Anordnung zur Erzielung hochgenauer Messwerte am Auge |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006011624A1 (de) | 2006-03-10 | 2007-09-13 | Carl Zeiss Meditec Ag | Vorrichtung und Verfahren zur definierten Ausrichtung eines Auges |
DE102009007732A1 (de) | 2009-02-05 | 2010-08-12 | Carl Zeiss Meditec Ag | Anordnung zur Darstellung einer Fixiermarke für ophthalmologische Untersuchungs- und/oder Behandlungsgeräte |
DE102010021346B4 (de) | 2010-05-22 | 2019-05-16 | Karlsruher Institut für Technologie | Ophthalmologisches Untersuchungsgerät |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3143882A1 (de) * | 1981-02-02 | 1982-09-02 | Jenoptik Jena Gmbh, Ddr 6900 Jena | "verfahren zur fixationssicherung bei ophthalmologischen untersuchungsgeraeten" |
US4995717A (en) * | 1989-08-22 | 1991-02-26 | The University Court Of The University Of Glasgow | Device for moving eye campimetry |
DE4108435A1 (de) * | 1990-04-04 | 1991-10-10 | Jenoptik Jena Gmbh | Anordnung zur fixationskontrolle fuer ophthalmologische untersuchungsgeraete |
DE4108403A1 (de) * | 1990-04-04 | 1991-10-10 | Jenoptik Jena Gmbh | Perimeter mit reflektorischer fixationssicherung |
JPH07148179A (ja) * | 1993-12-01 | 1995-06-13 | Nikon Corp | 手術用顕微鏡 |
EP0882438A2 (de) * | 1997-06-02 | 1998-12-09 | Nidek Co., Ltd. | Laserbehandlungsvorrichtung |
US5947955A (en) * | 1997-09-12 | 1999-09-07 | Lasersight Technologies, Inc. | Active eye movement and positioning control device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2238207A (en) * | 1937-11-06 | 1941-04-15 | Dartmouth College | Testing eyes |
US3984156A (en) * | 1974-09-12 | 1976-10-05 | Narco Scientific Industries, Inc. | Objective plotting of visual fields by eye movement monitoring |
US5206671A (en) * | 1990-06-29 | 1993-04-27 | Eydelman Malvina B | Testing and treating of visual dysfunctions |
US5565949A (en) * | 1995-07-10 | 1996-10-15 | Kasha, Jr.; John R. | Visual field perimetry on a small computer screen |
US5883692A (en) * | 1997-10-01 | 1999-03-16 | Retsan, Inc. | Visual field measurement apparatus |
US6474817B1 (en) * | 2000-06-27 | 2002-11-05 | Visionrx, Inc. | Method for establishing fixation in visual field perimetry |
WO2006029097A2 (en) * | 2001-10-22 | 2006-03-16 | Fovioptics, Inc. | Systems and methods for maintaining optical fixation and alignment |
US20040046934A1 (en) * | 2002-02-14 | 2004-03-11 | Board Of Regents, The University Of Texas System | Oculokinetic offset acuity testing |
US6726325B2 (en) * | 2002-02-26 | 2004-04-27 | Carl Zeiss Meditec, Inc. | Tracking assisted optical coherence tomography |
-
2003
- 2003-12-12 DE DE10359239A patent/DE10359239A1/de not_active Withdrawn
-
2004
- 2004-12-02 US US10/595,846 patent/US7628488B2/en not_active Expired - Fee Related
- 2004-12-02 WO PCT/EP2004/013675 patent/WO2005058215A1/de active Application Filing
- 2004-12-02 EP EP04803428A patent/EP1696844A1/de not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3143882A1 (de) * | 1981-02-02 | 1982-09-02 | Jenoptik Jena Gmbh, Ddr 6900 Jena | "verfahren zur fixationssicherung bei ophthalmologischen untersuchungsgeraeten" |
US4995717A (en) * | 1989-08-22 | 1991-02-26 | The University Court Of The University Of Glasgow | Device for moving eye campimetry |
DE4108435A1 (de) * | 1990-04-04 | 1991-10-10 | Jenoptik Jena Gmbh | Anordnung zur fixationskontrolle fuer ophthalmologische untersuchungsgeraete |
DE4108403A1 (de) * | 1990-04-04 | 1991-10-10 | Jenoptik Jena Gmbh | Perimeter mit reflektorischer fixationssicherung |
JPH07148179A (ja) * | 1993-12-01 | 1995-06-13 | Nikon Corp | 手術用顕微鏡 |
EP0882438A2 (de) * | 1997-06-02 | 1998-12-09 | Nidek Co., Ltd. | Laserbehandlungsvorrichtung |
US5947955A (en) * | 1997-09-12 | 1999-09-07 | Lasersight Technologies, Inc. | Active eye movement and positioning control device |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 09 31 October 1995 (1995-10-31) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010017837A1 (de) * | 2010-04-22 | 2011-10-27 | Carl Zeiss Meditec Ag | Anordnung zur Erzielung hochgenauer Messwerte am Auge |
US8491122B2 (en) | 2010-04-22 | 2013-07-23 | Carl Zeiss Meditec Ag | Arrangement for attaining high-precision measurements of an eye |
Also Published As
Publication number | Publication date |
---|---|
US20070002278A1 (en) | 2007-01-04 |
EP1696844A1 (de) | 2006-09-06 |
DE10359239A1 (de) | 2005-07-07 |
US7628488B2 (en) | 2009-12-08 |
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