Abstract: A microscopy method for imaging an object includes: imaging the object into an optical image onto an image detector, generating electronic image data from the optical image using the image detector and generating an electronic image from the electronic image data, defining a region of interest in the electronic image, determining a depth distribution in the region of interest and/or in a region of the object corresponding to the region of interest, determining a desired depth region in the depth distribution, selecting at least one imaging parameter with which a size of a depth-of-field region can be changed, and setting the depth-of-field region of the electronic image by changing the at least one selected imaging parameter such that the depth-of-field region covers the desired depth region or covers a specific portion thereof.

Abstract: A computer-implemented method determines a geometric feature of a section of a blood vessel in an operating region. An image of the section is provided. An adapted blood vessel model is provided via image processing for the section by adapting a blood vessel model, which describes the section as a flow channel with a wall delimiting the latter and with an axis of symmetry. A centerline of the section of the blood vessel is determined as a contiguous pixel line. A relative spatial position of the side of the wall is ascertained based on the centerline and the image provided. The geometric feature is derived from the adapted blood vessel model. The disclosure also relates to a method for determining the length of a contiguous pixel line in an image and a system for determining a geometric feature of a section of an object.

Abstract: The invention relates to a method for examining an eye of a patient by the patient themselves by means of an ophthalmological apparatus, said apparatus having front optics and an apparatus pupil. According to said method, the patient positions the ophthalmological apparatus relative to the eye, a measure of the deviation of the pupil of the eye from the apparatus pupil is determined, and a pupil correction signal is produced depending on the measure of the deviation, said pupil correction signal specifying a direction and/or a degree of the deviation and being output to the patient. The patient can use the pupil correction signal for repositioning in relation to the ophthalmological apparatus with a smaller deviation.

Abstract: A method and a system for generating an assistance function for an ophthalmological surgery are presented. The method includes capturing digital image data of a surgical microscope, which were generated during an ophthalmological surgery by an image sensor and which are annotated. The method furthermore includes capturing sensor data of a phaco system, which were generated during the ophthalmological surgery by a sensor of the phaco system and which are annotated, wherein the annotated sensor data and the annotated digital image data have synchronized timestamps and wherein the annotations refer in indicative fashion to a state of an ophthalmological surgery.

Abstract: A laser therapy device includes: a solid-state laser for a CW operation and including a pump source; and a controller for generating at least one first pulse of the laser in a first-pulse operation, the controller switching on the pump source to a pump power level S1 at least once during the first-pulse operation. A rise time E, after which the pump power level S1 of the pump source is attainable and starting from the time the pump source is switched on, is in a range of 50 ns to 350 ns.

Abstract: A treatment method and apparatus for surgical correction of defective-eyesight in an eye of a patient, wherein a laser device is controlled by a control device, said laser device separating corneal tissue by irradiation of laser radiation to isolate a volume located within a cornea, wherein the control device controls the laser device to focus the laser radiation, by providing target points located within the cornea, into the cornea, wherein the control device, when providing the target points, allows for focus position errors which lead to a deviation between the predetermined position and the actual position of the target points when focusing the laser radiation, by pre-offsets depending on the positions of the respective target points to compensate for said focus position errors.

Abstract: A method for operating a head-wearable presentation apparatus is provided. The method comprises the steps of: capturing data that are representative of at least one state variable of the head of a person wearing the head-wearable presentation apparatus, evaluating the captured data in order to determine the at least one state variable of the head, and modifying a degree of transparency of at least one playback arrangement of the head-wearable presentation apparatus if the at least one state variable of the head corresponds to a predetermined state variable.

Abstract: A visualization system includes an optical recording unit configured to capture optical signals characterizing at least one partial region of an object, a 3D reconstruction unit configured to ascertain spatial data sets, which describe the partial region of the object, based on the captured optical signals, a hologram computational unit configured to ascertain control data for producing a holographic presentation based on the spatial data sets of the partial region of the object, and a visualization unit configured to visualize a holographic presentation of the at least one partial region of the object for a user of the visualization system based on the control data. In addition, a suitable method for producing holographic presentations from optical signals is provided.

Abstract: An eye surgery system includes an operating microscope having at least one camera, a data memory, a pattern generator, and a display apparatus. The operating microscope presents a microscope image of an eye, and the at least one camera records a camera image of the eye. The data memory stores data that represent at least one predetermined position, relative to the eye, of a trocar to be inserted into the eye. The pattern generator generates a pattern representing the predetermined position of the trocar on the basis of the data stored in the data memory and the camera image recorded by the camera, and the display apparatus overlays the pattern produced by the pattern generator on the microscope image of the eye.

Abstract: A method for generating control data to control a laser device for correcting defective vision. A cut surface is specified which is curved, has a vertex and an edge, and is to be created in the eye. One or more paths, along which a focus of the laser radiation is to be adjusted, are defined for the control data and are selected such that they lie on or near the cut surface. To select the paths, a reference plane, preferably perpendicular, with respect to a direction of incidence of the laser radiation is determined, and different displacement positions are determined for said reference plane from the vertex to the edge of the cut surface. Multiple axes or semi-axes are determined for each displacement position. Intersections of the axes are connected into closed curves which are concentric or form a spiral.

Abstract: A filter set for simultaneously observing fluorescent and non-fluorescent object regions, and an observation system and a method in which the filter set is used are disclosed. The illumination and observation light filters of the filter set each have two separate passbands with high transmission, which are spectrally defined such that illumination light outside the emission spectrum of fluorescence can pass through the illumination and observation light filters and fluorescent light is not swamped by the illumination light. The transmission of the passbands is defined such that non-fluorescent object regions can be observed substantially with color fidelity.

Abstract: A microscopy method for quantifying a fluorescence of protoporphyrin IX includes: imaging an object region onto a first detector field and a second detector field, wherein a first optical filter and a second optical filter, respectively, are arranged in the beam paths between the object region and the detector fields, the first optical filter and second optical filter respectively having a wavelength-dependent transmission characteristic; exciting at least a first fluorescence of protoporphyrin IX and a second fluorescence; recording first images and second images; and determining a spatially dependent fluorescence intensity of the first fluorescence in the object region by virtue of determining values representing a fluorescence intensity at locations in the object region, wherein the values are determined on the basis of the radiation intensities of the two detector fields detected in a spatially dependent manner and the spatially dependent wavelength-dependent detection efficiencies of the two detector fie

Abstract: An ophthalmological laser therapy system having an appliance base and an appliance head, displaceable relative to one another by translational movement and having a laser device and to a corresponding method. A laser pivot arm is fastened to the appliance head pivotable about a horizontal first axis. The laser pivot arm is encompassed by a pivot arm housing, which is fastened in a separately pivotable manner on the appliance head in coaxial fashion relative to the laser pivot arm and/or by virtue of an examination pivot arm with an examination device, defining an examination volume, being fastened to the appliance head pivotable about a second axis, wherein both axes are arranged such that a work volume of a laser beam, when the laser pivot arm is in a work position, is a partial volume of the examination volume, when the examination pivot arm is in a work position.

Abstract: The invention relates to a method for forming curved cuts in a transparent material, in particular in the cornea, by the creation of optical perforations in said material using laser radiation that is focused in the material. The focal point is displaced three-dimensionally to form the cut by lining up the optical perforations. The focal point is displaced in a first spatial direction by a displaceable lens and said focal directions, in such a way that it follows the contours of the cut, which lie on a plane that is substantially perpendicular to the first spatial direction.

Abstract: A method for holoscopic, optical coherence tomography for an object, wherein the method includes providing source radiation and splitting the source radiation into illumination radiation and reference radiation, illuminating an illumination field on the object with illumination radiation, said illumination field having an areal extent transverse to the direction of incidence, collecting illumination radiation scattered back from the object as measurement radiation, separating the measurement radiation collected from the object from the illumination radiation, and overlaying the measurement radiation with reference radiation and detecting an interference signal of the overlaid radiations with at least one areal detector with a two-dimensional extent, wherein the object in the illumination field is simultaneously illuminated by more than one spatial radiation mode, wherein the radiation modes of the illumination in the illumination field are spatially and temporally coherent with one another but have a fixed ph

Abstract: An OCT system for generating images of an anterior or posterior segment of an eye is described. The system includes a light source, a controller, optics, a detector, and a processor. The light source generates a beam of light and is capable of operating in a posterior or an anterior segment imaging mode. In the posterior segment imaging mode, light source outputs light with a first spectral bandwidth of less than 120 nm and including wavelengths between about 1060 to 1070 nm. In the anterior segment imaging mode the light source outputs light with a second spectral bandwidth that is larger than 120 nm. The controller enables switching between the posterior or anterior segment imaging mode.

Abstract: A scanning device for focusing a beam of rays in defined regions of a defined volume, comprising an input optics wherein the beam of rays penetrates first, having at least one first optical element; a focusing optics for focusing the beam of rays exiting from the input optics; and a deflecting device arranged between the first optical element and the focusing optics, for deflecting the beam of rays after it has passed through the first optical element, based on a position of the focus to be adjusted in lateral direction. In order to adjust the position of the focus of the beam of rays in the direction of the beam of rays, and optical element of the input optics can be displaced relative to the deflecting device.

Abstract: The invention is directed to a surgical microscope and a device for switching the same among multiple working modes. The device includes an illumination rotary member and an observation rotary member that are arranged, respectively, in the illumination beam path and the observation beam path of the surgical microscope and are drivable by the same power source to rotate synchronously among multiple rotary positions corresponding to the multiple working modes. In each of the rotary positions, light from a light source of the surgical microscope passes through one or more of multiple light-through-portions of the illumination rotary member along the illumination beam path to illuminate the observed object, and then passes through one or more of multiple light-through-portions of the observation rotary member along the observation beam path to reach the eyepiece and/or an observation instrument of the surgical microscope.