Abstract: The invention relates to a stereoscopic microscope, which is suited both for pure observation and also for support during surgical procedures in ophthalmology. It can be adapted to both uses through an inversion optics arrangement, which can be removed from the beam path of the microscope. The inversion optics arrangement is arranged in an attachment containing a field-magnifying lens, which attachment is needed in most cases, and is located between the field-magnifying lens and the objective lens of the microscope such that it is movable within the attachment. Thus, the field-magnifying lens does not need to be moved in the case of sight defects of a patient, but the correction is carried out with the inversion optics arrangement, and this means an inside focussing occurs. The inversion optics arrangement can also be removed with the attachment so that the microscope can then be used as a normal viewing microscope.

Abstract: A stereomicroscope for use in performing surgeries, in particular eye surgeries, which has a collecting lens common to both beam paths and has for each beam path an objective and an ocular tube with two reversing prisms with adjustable interocular distance, which ocular tubes form a telescope. In order to produce, at an angled beam path with the help of the panorama funduscopy, an upright and unreversed image, between the objective (7) and the ocular tubes (11, 12) which contain the telescope is provided a double-refracting, reflecting system (4, 19, 20) which delivers a turned, unreflected image and covers both beam paths, which system is arranged in the stereomicroscope so that same can be exchanged with a 90.degree. prism which is constructed with the same optical path length and covers both beam paths.

Abstract: An optical device for imaging an interior of an eye, especially a retina of the human eye, with the optical device including a front element which acts as an objective and which is adapted to be brought in proximity to the eye, and a single- or multi-element field lens disposed in a common mount. The mount and field lens each include a flattened surface portion extending substantially parallel to a common optical axis of the front element and field lens. The flattened surface portions are disposed so as to permit an introduction of a surgical instrument into the eye during eye surgery such as, for example, vitrectomy.

Abstract: The invention contemplates a micromanipulator as for the manipulation of a vitrectomy instrument, wherein a single remotely operable control means is effective through three independent spherical-coordinate servoelectric drives to selectively control the operative end of the instrument, within an operating volume defined by spherical coordinates centered at a fixed point of origin; in a vitrectomy, the fixed point of origin is illustratively the point of surgical entry through the pars plana of the eye.