Abstract: A system for performing measurements of an eye comprises: a measurement tool that measures the eye, at least one rest that maintains a facial measurement position and defines a centering rest portion that maintains a lateral facial measurement position; an adjuster mechanism that moves an objective of the measurement tool relative to the eye; and a processing unit configured to control the system. The unit controls the system to position, for a first eye, the objective at a predefined first pre-scan position; scan the objective away from the first pre-scan position until the system detects a pupil of the first eye; and trigger one or more measurements of the first eye dependent on the system detecting the pupil of the first eye.

Abstract: In one embodiment, an apparatus comprises a touchscreen and a control device for executing an operating command which is input on the user side via the touchscreen. The control device is adapted to control the touchscreen such that, in order to prompt a command input, a first graphic element marking a touching starting location and a destination graphic arrangement having at least one second graphic element at a distance from the first graphic element are displayed on the touchscreen. The control device is further adapted to recognise a command input depending detecting a first movement of at least one object over the touchscreen starting from the touching starting location continuously up to a second graphic element of the destination graphic arrangement and on reaching this second graphic element a movement stoppage of the object, followed by a follow-up action of the object on the touchscreen.

Abstract: In an embodiment, a scanning optical system comprises first and second optical sources and a deflector device. The first and second optical sources provide first and second beams, respectively, of optical radiation. The deflector device is disposed to receive and deflect the first and second beams, and is configured for a scanning operation on a beam of radiation traversing the deflector device. The first beam is incident on the deflector device with a first orientation and the second beam is incident on the deflector device with a second orientation that is different from the first orientation.

Abstract: In a process for optical coherence tomography a plurality of first OCT slice images, in each first slice image representing a different slice of an object, are recorded. Subsequently a reference figure that is representative of the three-dimensional contour of at least one structural feature of the object in a given three-dimensional coordinate system is ascertained by feature recognition of the at least one structural feature in the first slice images. Then a plurality of second OCT slice images, each second slice image representing a different slice of the object, are recorded. At least a fraction of the second slice images are displaced in the coordinate system until each second slice image is in feature overlap with the reference figure. Lastly, a set of three-dimensional OCT image data is generated at least from the feature-overlapped second slice images.

Abstract: A technique for optical coherence tomography is provided. As to a device aspect of the technique, an imaging device comprises a base defining a rotation axis, a scanning and focusing assembly mounted to the base for rotation about the rotation axis, and a drive unit for rotationally driving the scanning and focusing assembly about the rotation axis. The scanning and focusing assembly includes a focusing device for focusing a beam of imaging radiation to produce a focused beam of imaging radiation having a focus, a scanning member for scanning the beam of imaging radiation, and a controller coupled to the drive unit and the scanning member and configured to control the scanning member to cause movement of the focus along a predetermined trajectory with respect to the scanning and focusing assembly.

Abstract: In an embodiment, a scanning optical system comprises first and second optical sources for providing and a deflector device. The first and second optical sources provide first and second beams, respectively, of optical radiation. The deflector device is disposed to receive and deflect the first and second beams, and is configured for a scanning operation on a beam of radiation traversing the deflector the device. The first beam is incident on the deflector device with a first orientation and the second beam is incident on the deflector device with a second orientation that is different from the first orientation.

Abstract: A system for performing measurements of an eye comprises: a measurement tool that measures the eye, at least one rest that maintains a facial measurement position and defines a centering rest portion that maintains a lateral facial measurement position; an adjuster mechanism that moves an objective of the measurement tool relative to the eye; and a processing unit configured to control the system. The unit controls the system to position, for a first eye, the objective at a predefined first pre-scan position; scan the objective away from the first pre-scan position until the system detects a pupil of the first eye; and trigger one or more measurements of the first eye dependent on the system detecting the pupil of the first eye.

Abstract: According to an exemplary embodiment, a device (12) for assisting in the preparation of an operation on the human eye (14) for the purpose of generating a corneal flap by means of a microkeratome system (10) includes: an input interface arrangement (50) that permits at least the input of data relating to a set value of at least one flap parameter and also to at least one patient-related parameter; a computer (46) that has been set up to access a stored data collection (44) of several surgical data records, each of which includes a post-operative actual value of at least one flap parameter, a value for at least one patient-related parameter and configuration data of the microkeratome system, the computer (46) having been set up to ascertain, on the basis of the data collection (44) in a manner depending on the input data, configuration information that represents a proposed configuration of the microkeratome system (10); an output interface arrangement (48) for outputting the configuration information.

Abstract: In one embodiment, an apparatus comprises a touchscreen and a control device for executing an operating command which is input on the user side via the touchscreen. The control device is adapted to control the touchscreen such that, in order to prompt a command input, a first graphic element marking a touching starting location and a destination graphic arrangement having at least one second graphic element at a distance from the first graphic element are displayed on the touchscreen. The control device is further adapted to recognise a command input depending detecting a first movement of at least one object over the touchscreen starting from the touching starting location continuously up to a second graphic element of the destination graphic arrangement and on reaching this second graphic element a movement stoppage of the object, followed by a follow-up action of the object on the touchscreen.

Abstract: A technique for optical coherence tomography is provided. As to a device aspect of the technique, an imaging device comprises a base defining a rotation axis, a scanning and focusing assembly mounted to the base for rotation about the rotation axis, and a drive unit for rotationally driving the scanning and focusing assembly about the rotation axis. The scanning and focusing assembly includes a focusing device for focusing a beam of imaging radiation to produce a focused beam of imaging radiation having a focus, a scanning member for scanning the beam of imaging radiation, and a controller coupled to the drive unit and the scanning member and configured to control the scanning member to cause movement of the focus along a predetermined trajectory with respect to the scanning and focusing assembly.

Abstract: In a process for optical coherence tomography a plurality of first OCT slice images, in each first slice image representing a different slice of an object, are recorded. Subsequently a reference figure that is representative of the three-dimensional contour of at least one structural feature of the object in a given three-dimensional coordinate system is ascertained by feature recognition of the at least one structural feature in the first slice images. Then a plurality of second OCT slice images, each second slice image representing a different slice of the object, are recorded. At least a fraction of the second slice images are displaced in the coordinate system until each second slice image is in feature overlap with the reference figure. Lastly, a set of three-dimensional OCT image data is generated at least from the feature-overlapped second slice images.

Abstract: A spectroscopic instrument includes a first optical component for spatial spectral splitting of a polychromatic beam of light impinging onto the first optical component, an objective, which routes various spectral regions of the split beam of light onto differing spatial regions, and a sensor, situated downstream of the objective in the beam path of the beam of light, with a plurality of light-sensitive sensor elements. The sensor elements are arranged in the beam path of the split beam of light in such a manner that each sensor element registers the intensity of a spectral sector of the beam of light and the medians of the spectral sectors are situated equidistant from one another in the k-space, where k denotes the wavenumber.

Abstract: According to an exemplary embodiment, a device (12) for assisting in the preparation of an operation on the human eye (14) for the purpose of generating a corneal flap by means of a microkeratome system (10) includes: an input interface arrangement (50) that permits at least the input of data relating to a set value of at least one flap parameter and also to at least one patient-related parameter; a computer (46) that has been set up to access a stored data collection (44) of several surgical data records, each of which includes a post-operative actual value of at least one flap parameter, a value for at least one patient-related parameter and configuration data of the microkeratome system, the computer (46) having been set up to ascertain, on the basis of the data collection (44) in a manner depending on the input data, configuration information that represents a proposed configuration of the microkeratome system (10); an output interface arrangement (48) for outputting the configuration information.

Abstract: An apparatus for optical swept-source coherence tomography comprises a spectrally tuneable source for emitting coherent light, and a detector for acquiring the intensity of remitted light backscattered from an object irradiated with the coherent light of the source. Further, the apparatus comprises a control device, which is set up to control the light source and the detector in such a way that the detector performs intensity acquisitions in accordance with a defined number of measurements, while the light source is tuned, the control device further being set up, for the purpose of altering the measurement depth or/and the axial resolution of the tomography, to alter the defined number of measurements or/and a spectral measurement bandwidth, within which the detector performs the intensity acquisitions.

Abstract: A device for ophthalmic surgery includes a vacuum-pump arrangement for generating a vacuum serving for fixing a suction ring to an eye, an evacuation-path system for transmitting the vacuum to an interface port which permits the separable attachment of a suction-ring instrumentarium including the suction ring, and also a control unit for controlling the vacuum-pump arrangement. In accordance with the invention, the device includes pressure-measuring components for measuring at least the vacuum pressure, the control unit adapted to ascertain a differential pressure between the measured vacuum pressure and an atmospheric pressure. The vacuum-pump arrangement is preferably operated at maximal pumping power in a test-operation mode with suction-ring instrumentarium not attached, in order to ascertain an optimally obtainable relative underpressure in the evacuation-path system.

Abstract: A device for ophthalmic surgery includes a vacuum-pump arrangement for generating a vacuum serving for fixing a suction ring to an eye, an evacuation-path system for transmitting the vacuum to an interface port which permits the separable attachment of a suction-ring instrumentarium including the suction ring, and also a control unit for controlling the vacuum-pump arrangement. In accordance with the invention, the device includes pressure-measuring components for measuring at least the vacuum pressure, the control unit adapted to ascertain a differential pressure between the measured vacuum pressure and an atmospheric pressure. The vacuum-pump arrangement is preferably operated at maximal pumping power in a test-operation mode with suction-ring instrumentarium not attached, in order to ascertain an optimally obtainable relative underpressure in the evacuation-path system.

Abstract: A microkeratome system for the generation of a flap on the human eye includes a plurality of functionally different, separately interchangeable components with, in each instance, at least one characteristic feature. In addition, the system includes a control unit for controlling the operation of the microkeratome system, the control unit having access to stored information that is representative of at least one predetermined combination of the characteristic features of at least a fraction of the components, and also an input device for entering information that is representative of a desired combination of the characteristic features of at least a fraction of the components. The control unit is adapted to compare the desired combination of features with the at least one predetermined combination of features and to bring about a predetermined response, depending on the result of the comparison.

Abstract: A device (10) for fitting a cutting head (26) of a microsurgical cutting instrument, in particular a cutting instrument for use in refractive eye treatments, with a cutting blade unit, comprises a blade cartridge (12) which can be detachably coupled to the cutting blade holder (26) and in which a cutting blade unit is received. In addition, the fitting device comprises a slide (20) which is or can be held slidably relative to the cartridge and by means of which the cutting blade unit can be pushed out of the blade cartridge into a blade receiving pocket of the cutting head (26). Preferably, the slide (20) can be coupled to the cutting blade unit not only in a thrust-proof manner, but also in a traction-proof manner, so that after use the cutting blade unit can be withdrawn from the cutting head again by means of the slide (20) and guided back into the cartridge (12).