Abstract: A positioning unit (11) for positioning an optical unit (12, 13) comprising at least one optical element in a beam path (20) of a microscope between an objective lens of a microscope and in front of an eye to be monitored is provided, wherein the positioning unit comprises a connection device (21), by means of which the positioning unit can be coupled to the microscope, wherein the positioning unit comprises a positioning device (22), by means of which the optical element is movable relative to the microscope in the longitudinal direction of the beam path, wherein the positioning device is formed by a first double rocker mechanism (31) and a second double rocker mechanism (32), wherein the double rocker mechanisms are interconnected by means of a common coupling member (33). A monitoring device (10) is also provided that comprises the positioning unit (11).

Abstract: A positioning unit for positioning an optical unit in an optical path of a microscope between a microscope lens and in front of an eye to be examined includes a connection device and a positioning device. The connection device couples the positioning unit to the microscope. The positioning device moves the optical element relative to the microscope in a longitudinal direction of the optical path. The positioning unit is predominantly formed from aluminum free metal.

Abstract: An eyesight testing apparatus includes an imaging device for virtual imaging a test object located within a focal length of the imaging device and imaged at different distances into eyes of a subject located in a focal point of the imaging device, an optical deflection device arranged in a beam path between the imaging device and the test object to deflect the beam path by 180°, wherein the deflection device is displaceable in the direction of the beam path and the test object is not, a monitor device that generates the test object and that comprises a single monitor, optical components lying in the beam path sized so that both eyes are able to take part in a test, and so a partial beam path is formed for each eye, and a blocking device arranged in the beam path, which comprises two LCD blocking elements for the partial beam paths.

Abstract: A positioning unit for positioning an optical unit (12, 13) comprising at least one optical element in a beam path (20) of a microscope between an objective lens of a microscope and in front of an eye to be monitored is provided, wherein the positioning unit comprises a connection device (21), wherein the connection device (21) can couple the positioning unit can be coupled to the microscope, wherein the positioning unit is formed, at least in part, of plastics material. The invention also relates to a monitoring device (10) comprising a positioning unit (11).

Abstract: A positioning unit for positioning an optical unit (12, 13) comprising at least one optical element in a beam path (20) of a microscope between an objective lens of a microscope and in front of an eye to be monitored is provided, wherein the positioning unit comprises a connection device (21), wherein the connection device (21) can couple the positioning unit can be coupled to the microscope, wherein the positioning unit is formed, at least in part, of plastics material. The invention also relates to a monitoring device (10) comprising a positioning unit (11).

Abstract: A positioning unit (11) for positioning an optical unit (12, 13) comprising at least one optical element in a beam path (20) of a microscope between an objective lens of a microscope and in front of an eye to be monitored is provided, wherein the positioning unit comprises a connection device (21), by means of which the positioning unit can be coupled to the microscope, wherein the positioning unit comprises a positioning device (22), by means of which the optical element is movable relative to the microscope in the longitudinal direction of the beam path, wherein the positioning device is formed by a first double rocker mechanism (31) and a second double rocker mechanism (32), wherein the double rocker mechanisms are interconnected by means of a common coupling member (33). A monitoring device (10) is also provided that comprises the positioning unit (11).

Abstract: An eyesight testing apparatus includes an imaging device for virtual imaging a test object located within a focal length of the imaging device and imaged at different distances into eyes of a subject located in a focal point of the imaging device, an optical deflection device arranged in a beam path between the imaging device and the test object to deflect the beam path by 180°, wherein the deflection device is displaceable in the direction of the beam path and the test object is not, a monitor device that generates the test object and that comprises a single monitor, optical components lying in the beam path sized so that both eyes are able to take part in a test, and so a partial beam path is formed for each eye, and a blocking device arranged in the beam path, which comprises two LCD blocking elements for the partial beam paths.

Abstract: The invention relates to a perimeter and a method for operating a perimeter during a field of vision examination, whereby light stimuli in the field of vision of the person to be tested are presented on an observational surface during the examination process. At least one moving light stimulus is presented to the eye during an examination process with a time offset and then at least one non-moving light stimulus or conversely is presented on the observational surface.

Abstract: The invention relates to a perimeter and a method for operating a perimeter during a field of vision examination, whereby light stimuli in the field of vision of the person to be tested are presented on an observational surface during the examination process. At least one moving light stimulus is presented to the eye during an examination process with a time offset and then at least one non-moving light stimulus or conversely is presented on the observational surface.

Abstract: A removable optical device with at least one lens for releasable attachment to a microscope suited for contact-free observation of an eye, which can be arranged between the objective of the microscope and the eye in the optical axis of the microscope. A drive device is provided, with which the lens can be adjusted along the optical axis of the microscope, whereby an electric drive motor is integrated in the removable device, which, together with the device, can be detached from the microscope and sterilized by suitable methods.

Abstract: Provisions must be made in surgery microscopes for eye surgeries through the selective adding of optics so that a non-reversed and erect-standing image can be produced including that of the fundus of the eye. A device for the image reversion is fastened on the microscope so that it can be moved into the beam path and is then provided between the lens and the eye so that the overall height of the microscope is not influenced. This inventive arrangement can be utilized very universally on very differently designed microscopes and can be operated with prism systems of varying designs.

Abstract: A removable optical device with at least one lens for releasable attachment to a microscope suited for contact-free observation of an eye, which can be arranged between the objective of the microscope and the eye in the optical axis of the microscope. A drive device is provided, with which the lens can be adjusted along the optical axis of the microscope, whereby an electric drive motor is integrated in the removable device, which, together with the device, can be detached from the microscope and sterilized by suitable methods.

Abstract: Provisions must be made in surgery microscopes for eye surgeries through the selective adding of optics so that a non-reversed and erect-standing image can be produced including that of the fundus of the eye. A device for the image reversion is fastened on the microscope so that it can be moved into the beam path and is then provided between the lens and the eye so that the overall height of the microscope is not influenced. This inventive arrangement can be utilized very universally on very differently designed microscopes and can be operated with prism systems of varying designs.

Abstract: Provisions must be made in surgery microscopes for eye surgeries through the selective adding of optics so that a non-reversed and erect-standing image can be produced including that of the fundus of the eye. A device for the image reversion is fastened on the microscope so that it can be moved into the beam path and is then provided between the lens and the eye so that the overall height of the microscope is not influenced. This inventive arrangement can be utilized very universally on very differently designed microscopes and can be operated with prism systems of varying designs.

Abstract: Microscopes with a noncontact wide-angle viewing scope are used during surgeries on the eye, wherein an electromotively adjustable optic is provided between the lens and the eye. In order to prevent the surgeon from interrupting the surgery in order to refocus and to allow the electromotive drive to be maintained in a sterile condition, the drive is provided above the lens and is rotatably connected to an adjusting gear for the optic by means of a flexible drive shaft which can be released from the drive.

Abstract: Provisions must be made in surgery microscopes for eye surgeries through the selective adding of optics so that a non-reversed and erect-standing image can be produced including that of the fundus of the eye. A device for the image reversion is fastened on the microscope so that it can be moved into the beam path and is then provided between the lens and the eye so that the overall height of the microscope is not influenced. This inventive arrangement can be utilized very universally on very differently designed microscopes and can be operated with prism systems of varying design's.

Abstract: A device for viewing the fundus of the eye, in particular by means of an optical system, has a handle and a lens system fastened to the handle. The lens system has thereby a first lens with a concave lens surface, which can be placed onto the corona of an eye and can be combined with further lenses. Such a device is further developed in such a manner that on the one hand the fundus of the eye can be viewed and on the other hand a quick change for viewing of the foreground of the eye is possible when the device is removed from the beam path between the eye and the optical system. The device is therefore further developed in such a manner that the handle has a mounting for a supplementary lens, which is mounted in viewing direction in front of the lens system, whereby the strength of the supplementary lens is chosen in such a manner that when viewing the fundus of the eye with the device the optical system is actually clearly focused onto the foreground of the eye.

Abstract: Microscopes with a noncontact wide-angle viewing scope are used during surgeries on the eye, wherein an electromotively adjustable optic is provided between the lens and the eye. In order to prevent the surgeon from interrupting the surgery in order to refocus and to allow the electromotive drive to be maintained in a sterile condition, the drive is provided above the lens and is rotatably connected to an adjusting gear for the optic by means of a flexible drive shaft which can be released from the drive.

Abstract: A vision-testing device for examining the crepuscular vision, which has several visual signs which can be placed at random into the beam path, and a glare light source, all in a closed housing. The device has in extension of the axis of the eye a partially transparent mirror inclined with respect to the axis of the eye and a refractive element. The vision-testing device is compact, light and robust in design and enables a testing of the crepuscular visual acuity and the dazzle sensitivity. The refractive element consists of an achromatic lens inserted into the beam path, and covering the visual range of both eyes or a concentrating reflector, at the focal point of which is provided the visual sign location. The carrier for the visual signs to be located at the visual sign location can be arranged movably such that any of the multiple visual signs placed on the carrier can be moved into the beam path.