Carl Zeiss Meditec Ag

Carl Zeiss Jena Gmbh

Axel Doering

Roland Bergner

Klaus-Ditmar Voigt

Roland Barth

Dietmar Steinmetz

Lothar Mueller

Frank Behrendt

Burkhard Dietzel

Siegfried Schubert

Ingo Koschmieder

Bernd Spruck

Oliver Baumann

Michael Claus

Thomas Schulze

Michael Trost

Frank Behrend

Daniel Baumgarten

Combined equipment for non-contacting determination of axial length (AL), anterior chamber depth (VKT) and corneal curvature (HHK) of the eye, are also important for the selection of the intraocular lens IOL to be implanted, particularly the selection of an intraocular lens (IOL) to be implanted, preferably with fixation of the eye by means of a fixating lamp and/or illumination through light sources grouped eccentrically about the observation axis.

System and method for the non-contacting measurements of the eye

A method for creating or calculating panoramic images of the eye fundus particularly from images of a fundus camera. In the method a pre-positioning process is carried out in which a first variable is determined for geometrically associating the images with each other. An anchor image is determined as a reference for the first variables for the geometric association; areas that are associated with each other are determined in the anchor image and the other images by a block-matching algorithm; transformation parameters for a geometric transformation between the anchor image and the other images are determined from the mutual position of the associated areas; and the other images are transformed onto the anchor image by transformation parameters and are superimposed onto the anchor image and among each other.

Method for the creation of panoramic images of the eye fundus

The present invention is directed to an arrangement and a method for eye examination and/or for determining biometric eye data in which the movement of the eyes is compensated through the use of an eye tracker unit. The arrangement comprises a controllable digital illumination unit and an observation system which are arranged on separate supporting arms. A central control unit has connections to an image recording unit, an optical imaging system, an eye tracker unit and an output unit. Further, transmitter elements and/or actuating drives are provided at the separate supporting arms, at the zoom system and at the magnification changer. The examination can be adapted in an optimal manner to the task at hand by means of the structured illumination patterns that can be generated in a variable manner. Detection of all adjusting parameters relevant for recording can be used for calculations and for reconstructing the pertinent observation conditions. In case of repeated examinations for determining changes, e.g., during the recovery process following eye surgery, the regions can be found again in a simple manner and examined under exactly the same conditions.

Ophthalmological appliance comprising an eye tracker

An arrangement and method for positioning an ophthalmologic device with respect to the patient's eye to be examined in x-, y- and/or z-coordinates. The device includes a controllable illumination unit, an observation system, an image recording unit, a central control unit, an output unit, an eye tracker unit, and a device for relative positioning. The imaging system of the eye tracker unit has at least two different adjustable magnifications. In positioning the ophthalmologic device, the signal of the eye tracker unit is used to track a measuring mark and/or grid structure projected on the eye, and also to detect the position of the patient's eye with respect to the optical axis of the ophthalmologic device. The inventive solution makes it possible to automatically position the entire device with respect to the eye to be examined, thus simplifying examination and accelerating determination of biometric data.

Ophthalmologic apparatus and related positioning method

The invention relates to a method for determining distances in the anterior ocular segment, preferably of the pupils and/or the diameter of the iris, wherein the image of at least part of the eye is recorded and digitized using an imaging device and an array for illuminating the eye. On the basis of said digital image, a center of gravity analysis and the determination of the central point are carried out, especially for the position of the pupils, by conducting an intensity and threshold analysis as rough determination. Based on said rough determination, a fine detection of the position of the edges of the pupil and/or the edges of the iris is carried out. Additionally, the angle between the visual axis and the optical axis of the eye can be determined from the position of a fixed reflection to the center of the pupil and/or the center of the iris.

Method for determining distances in the anterior ocular segment

Combined equipment for non-contacting determination of axial length (AL), anterior chamber depth (VKT) and corneal curvature (HHK) of the eye are also important for the selection of the intraocular lens IOL to be implanted, particularly the selection of an intraocular lens IOL to be implanted, preferably with fixation of the eye by means of a fixating lamp and/or illumination through light sources grouped eccentrically about the observation axis.

System and method for non-contacting measurement of the eye

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Jena, Germany

Axel Doering