Abstract: The ophthalmic workstation comprises a table having a top surface, a base unit mounted to the table, a microscope, and a headrest. The base unit includes an X-displacement stage, a Z-displacement stage, and a platform mounted to the X-displacement stage and the Z-displacement stage. The microscope is mounted to the platform. The table comprises an opening in its top surface. An embedded section of the base unit is located, at least in part, in this recess or opening. The headrest is mounted to a headrest section of the base unit, which projects laterally over an edge of the table.

Abstract: The ophthalmologic microscope has an illumination device for projecting light onto an eye to be observed and a microscope device with a camera to view the eye. The illumination device generates pulsed light and is slaved to the frame rate of the camera, which allows to run the camera in free-running mode for achieving a high frame rate. The light is pulsed at least at twice the frame rate of the camera to reduce flicker. The illumination device uses an array of micro-mirrors as spatial light modulator, and the mirrors are controlled for a balanced deflection over the frame cycles.

Abstract: The ophthalmologic microscope has an illumination device for projecting light onto an eye to be observed and a microscope device with a camera to view the eye. The illumination device generates pulsed light. The light is pulsed at least at twice the frame rate of the camera to reduce flicker. The illumination device uses an array of micro-mirrors as spatial light modulator, and the mirrors are controlled for a balanced deflection over the frame cycles, which allows to increase the service life of the microscope.

Abstract: The ophthalmologic microscope comprises a first component including a base and a stage, a second component including a pivotal arm and a microscope device, and a third component including a pivotal arm and a light source. The various components are mutually pivotal at a hinge. An electronically controlled brake and a position sensor are incorporated into the hinge. The brake controller of the microscope is adapted to interrupt a manual mutual displacement of the components in response to a signal from the position sensor in order to assist the user in properly aligning the components.

Abstract: An ophthalmologic device includes a microscope, an illumination system, a camera positioned to record an image through the microscope, and a storage device. When examining an eye, the camera is operated to continuously record a series of images. The images are stored in the storage device, each one with attributed imaging parameters describing the recording conditions of the image. When the examiner wants to retrieve images taking under examining conditions similar to the one presently used, the device is able to automatically retrieve the closest matches from the storage device. This allows to record, in the background, a large number of images documenting an eye's history and to retrieve them efficiently.

Abstract: In order to measure at least one geometric parameter of an eye, Purkinje reflections from blue and infrared light sources are recorded with a microscope and a camera. Due to the dispersion of the optics of the microscope, at least one set of reflections is defocused. By measuring the radii of the reflections, the offset of the camera from an ideal focusing position or another distance parameter can be calculated. The distance parameter can e.g. be used to correct the magnification factor of the microscope even if the microscope is a non-telecentric microscope. For example, it can be used to carry out more accurate keratometry measurement using a non-telecentric microscope and/or non-telecentric illumination.

Abstract: In a method for testing a disposable on a medical examination appliance, more particularly on a tonometer, wherein the medical examination appliance comprises a disposable holding apparatus, on which a disposable is held and, in particular, able to be brought into contact with a patient's eye for an applanation tonometry measurement, and which comprises a detection device, by means of which a physical property of the disposable can be measured, a measured value of the physical property of the disposable is ascertained by means of the detection device.

Abstract: A device (1) for examining an eye, in particular a slit lamp, comprises an image recording unit (220) with at least one first sensor (241.1) in a first beam path and a second sensor (241.2) in a second beam path, the device also comprising in the first beam path a first objective with a first optical axis, which has a fixed magnification and is arranged as fixed in the first beam path.

Abstract: A thermal flow sensor has a first substrate, second substrate and a third substrate, each of which has a first side and a second opposite side. The first substrate is connected to the second substrate such that the second side of the first substrate abuts the first side of the second substrate. The third substrate is connected to the second substrate such that the second side of the second substrate abuts the first side of the third substrate. The second substrate has a groove formed therein so as to form a conduit bounded by the second substrate and the second side of the first substrate and the first side of the third substrate. A heater is disposed on the first side of the first substrate opposed to the conduit. A first temperature sensor is disposed on the first side of the first substrate opposed to the conduit.

Abstract: A thermal flow sensor has a first, second and third substrate, each having a first side and a second opposite side. The first substrate is connected to the second substrate such that the second side of the first substrate abuts the first side of the second substrate. The third substrate is connected to the second substrate such that the second side of the second substrate abuts the first side of the third substrate. The second substrate has a groove formed therein so as to form a conduit bounded by the second substrate and the second side of the first substrate and the first side of the third substrate. A heater is disposed on the first side of the first substrate opposed to the conduit. A first temperature sensor is disposed on the first side of the first substrate opposed to the conduit. A second temperature sensor is disposed on the first side of the first substrate opposed to the conduit.

Abstract: A thermal flow sensor has a first, second and third substrate, each having a first side and a second opposite side. The first substrate is connected to the second substrate such that the second side of the first substrate abuts the first side of the second substrate. The third substrate is connected to the second substrate such that the second side of the second substrate abuts the first side of the third substrate. The second substrate has a groove formed therein so as to form a conduit bounded by the second substrate and the second side of the first substrate and the first side of the third substrate. A heater is disposed on the first side of the first substrate opposed to the conduit. A first temperature sensor is disposed on the first side of the first substrate opposed to the conduit. A second temperature sensor is disposed on the first side of the first substrate opposed to the conduit.

Abstract: A thermal flow sensor has a first substrate, second substrate and a third substrate, each of which has a first side and a second opposite side. The first substrate is connected to the second substrate such that the second side of the first substrate abuts the first side of the second substrate. The third substrate is connected to the second substrate such that the second side of the second substrate abuts the first side of the third substrate. The second substrate has a groove formed therein so as to form a conduit bounded by the second substrate and the second side of the first substrate and the first side of the third substrate. A heater is disposed on the first side of the first substrate opposed to the conduit. A first temperature sensor is disposed on the first side of the first substrate opposed to the conduit.

Abstract: A thermal flow sensor has a first, second and third substrate, each having a first side and a second opposite side. The first substrate is connected to the second substrate such that the second side of the first substrate abuts the first side of the second substrate. The third substrate is connected to the second substrate such that the second side of the second substrate abuts the first side of the third substrate. The second substrate has a groove formed therein so as to form a conduit bounded by the second substrate and the second side of the first substrate and the first side of the third substrate. The conduit has a fluid flow direction. A heater is disposed on the first side of the first substrate opposed to the conduit. A first temperature sensor is disposed on the first side of the first substrate opposed to the conduit and at a first predetermined distance from the heater in a direction opposite to the fluid flow direction.