Abstract: The invention relates to a device and a method for displaying the axis of astigmatism of an eye, in which an observation unit is used to observe the eye and, using a display unit, the orientation of the axis of astigmatism of the eye is displayed. A sensor unit generates sensor data which indicate a modification to the alignment of the observation unit relative to the eye. A calculation unit updates the displayed orientation of the axis of astigmatism with the aid of the sensor data, and issues it as the current orientation of the display unit.

Abstract: Disclosed are a method and a device for controlling an eye surgery system, wherein a light pattern is generated on an eye by an illumination device and is captured by a camera unit while the patient is in the position in which he or she will undergo the surgery. At least one property of the eye characterizing the current orientation of the eye during the surgery is determined from the light pattern by a computing unit.

Abstract: The invention relates to a method and device for determining eye position, wherein a light pattern is produced on the surface of an eye by means of a light source and an image of the light pattern produced on the eye is recorded by means of an image recording apparatus, wherein points of the transition region between the sclera and the iris of the eye are determined from the image of the light pattern by means of an image processing apparatus. The coordinates of the calculated points are calculated by triangulation or stereovision, and the position of the iris plane or a plane oriented parallel thereto is determined from said coordinates. The limbus of the eye and the center thereof can also be determined in three dimensions.

Abstract: The invention relates to a device for determining eye torsion, comprising a camera and an image processing unit, which is designed to carry out a method for determining eye torsion. In the method, at least two images of an eye are recorded and image data are produced from said images, and at least one characteristic feature of the eye is identified from the image data, for example a blood vessel. Direction histograms of the feature in both images are produced and compared with each other. The angle of the torsion of the eye is determined from the shift of the directions in the direction histograms.

Abstract: A method for determining the torsional component of an eye around the viewing direction comprises the steps: Recording an image of the eye (110); Extracting at least one “region of interest” (120) and transformation into a polar coordinate image (130); Detecting objects of at least one predefined object type in the polar coordinate image (140); Generating a function of the respective object type depending on the polar coordinate angle Phi (150); Generating a code from the functions of the object types depending on the polar coordinate angle Phi (160); and comparing the code (30) with a code being determined from a previous recording (170). The function of each object type is a 1-dimensional function, which is generated by combining (e.g. summarizing) along the radial component. A device for determining a measure of the torsional position of the eye position is designed for performing the method.

Abstract: The invention relates to a device for determining eye torsion, comprising a camera and an image processing unit, which is designed to carry out a method for determining eye torsion. In the method, at least two images of an eye are recorded and image data are produced from said images, and at least one characteristic feature of the eye is identified from the image data, for example a blood vessel. Direction histograms of the feature in both images are produced and compared with each other. The angle of the torsion of the eye is determined from the shift of the directions in the direction histograms.

Abstract: The invention relates to a method and device for determining eye position, wherein a light pattern is produced on the surface of an eye by means of a light source and an image of the light pattern produced on the eye is recorded by means of an image recording apparatus, wherein points of the transition region between the sclera and the iris of the eye are determined from the image of the light pattern by means of an image processing apparatus. The coordinates of the calculated points are calculated by triangulation or stereovision, and the position of the iris plane or a plane oriented parallel thereto is determined from said coordinates. The limbus of the eye and the center thereof can also be determined in three dimensions.