Abstract: An apparatus for performing measurements on the eye of a subject includes a headrest for supporting the head of the subject in a fixed position, and a frame holding a light source directing illumination at the eye. The frame is adapted for pivotal motion about a central axis of the eye. Imaging means provides an image of the first and fourth Purkinje images of the light, and means are provided for measuring the amount of rotation of the frame. The frame may be initially aligned so that a fixation target lies in the plane defined by the central axis and the light source, and then rotated until the first and fourth Purkinje images determine a straight line parallel to the central axis, whereby the plane is aligned with the optical axis of the eye. The net rotation of the frame then gives a direct reading of the angular difference between the line to the target and the optical axis of the eye. Preferably the apparatus includes an infrared light source.

Abstract: An examination unit which is particularly suitable as an ophthalmologic examination unit for the examination of a patient by an ophthalmologist, comprises a storage region for an examination apparatus, wherein the storage region is defined by a wall, and an opening in the wall for passing the examination apparatus therethrough from the storage region. In order to ensure an easy transfer of the examination unit to the patient a support frame is provided in the storage region having a pivot bearing with a pivot axis. A swivel arm is pivotable around the pivot axis from a rest position in which the swivel arm is positioned within the storage region, into an operating position in which the swivel arm has the free end thereof laterally swung out of the storage region through the opening. Furthermore, the examination apparatus is suspended at the free end of the swivel arm.

Abstract: A binocular opthalmoscope, having an optical viewing system, a light source and headgear mountable on an examiner's head during use for supporting the optical viewing system in optical alignment with the examiner's eyes and the light source with the output thereof above the optical viewing system. The light source has a selector for for selectively providing both full beam and slit beam illumination of a patient's eye, a first condensing lens for focusing light on the bull beam or slit beam aperture, a second condensing lens for refocusing the light passing through the aperture onto an aerial image of the retina, and a third lens for shortening the focal length of the beam emitted from the light outlet of the light source and which is mounting for pivotal movement into and out of the beam path.

Abstract: An ophthalmic instrument support having a flat floor-supported base and a cabinet extends upward from one end of the base, a post projects upward from the cabinet and the upper end of the post pivotally engages one end of a horizontal frame upon which a table is mounted for limited horizontal movement to permit a pair of spaced instruments thereon selectively to be brought into alignment with the eyes of a patient when seated in a vertically adjustable chair with the patient's lap extending beneath the horizontal frame. The post is adjustable vertically a limited amount to dispose the table and instruments thereon at a desired vertical position according to a doctor's eyes when the doctor is seated upon another chair opposite a patient.

Abstract: A stand apparatus for supporting a medical instrument such as ophthalmic instrument. The apparatus comprises a vertically movable arm, a guide rail for guiding the arm for vertical movement, a rod extending in parallel with the guide rail, and a braking device provided on the base portion of the arm and selectively engageable with the rod. The braking device includes; at least one braking member having at least two biting edges spaced from each other by a distance slightly greater than the diameter of the rod so as to bite the outer surface of the rod, the braking member swingably engaging at its one end with the base portion of the arm; a resilient spring for normally pressing the biting edges of the braking member into engagement with the outer surface of the braking member; a sliding arm member adapted to be moved by a brake releasing device in the direction perpendicular to the rod; and a link arm member to which the slide arm member and the other end of the braking member are connected pivotably.

Abstract: An ophthalmological surgical device comprises a laser unit (10) adapted to emit at least one laser beam (F) and an operating unit (11) adapted to focus the laser beam or beams (F) on an aiming point (0). The operating unit (11) incorporates a focusing lens (36) and a mirror (37). These are mounted on a supporting chassis (16) adjustably mounted on a base (24). First control device accessible to the operator control the position of the chassis (16) on the base (24). The lens (36) and mirror (37) are together mounted on an assembly (40) in turn mounted on the support chassis (16). The assembly (40) is movable relative to the chassis (16) under the control of second control device separate from the first control device.

Abstract: A binocular ophthalmoscope of the type including an optical viewing system. The binocular ophthalmoscope includes a headgear adapted to be worn on the examiner's head for supporting the optical viewing system in optical alignment with the examiner's eyes and light source for illuminating a patient's eye which is slideably mounted on the headgear and movable in a lateral direction.

Abstract: Head mounting apparatus which can accommodate different head sizes and shapes comprises a substantially rigid member for supporting equipment, such as night vision equipment, to be used by the wearer, and a flexible member which can flex to adapt to the head of the wearer. The rigid and flexible members are connected by pivotal means at pivot positions along spaced pivotal axes. The flexible member has buttons for attachment of straps by which it is in use secured to the wearer's head. The position of the rigid member relative to the flexible member may be adjustable by manual rotation of knobs.

Abstract: In an eye periphery portion illuminating device in an ophthalmologic instrument having a chin supporting member and a forehead applying member for fixing a patient's face to the apparatus body, a downwardly open depression is formed in the forehead applying member and a light source is contained in the depression.

Abstract: The invention relates to a displacement system for ophthalmologic examination units constituted of an instrument base section and an accessory section for mounting three ophthalmologic devices, said accessory section being connected by two lever means to said base section to enable displacement of the former relative to the latter from a first end position via an intermediate position into a second end position in the latter two positions relative to the said first end position the accessory section is displaced in parallel and at right angles relative to the base section so that the accessory section projects past over the base section. In this manner the opthalmologic devices are brought into an operation position in front of a patient and operator. A further lever system in combination with the lever means pivots a head rest to a patient in the intermediate and second end position, which head rest remains unchanged even when the ophthalmologic devices are changed for operation.

Abstract: The invention concerns a process and device for the positioning of an optical measuring instrument and a spectacle frame in relation to each other. The practitioner, operating from a position roughly determined by the point at which the two optical paths converge adjusts the relative position of the spectacle frame and measuring instrument so that the reflection of the side edge of the frame in a semi-transparent mirror located on each side of the device appears directly over the actual image of an alignment mark behind the mirror. This convergence indicates that the frame is in the correct position in relation to the measuring instrument.

Abstract: An actuating means for an ophthalmoscopic instrument wherein the adjustment knobs and handle are relatively located such that the knobs can be conveniently actuated by fingers of a hand gripping the handle.

Abstract: Disclosed is an adjustable instrument base suitable for holding optical instruments, comprising a base plate movable along first and second horizontal coordinate directions; a housing member surrounding the base plate and being movable with respect to the base plate in the first coordinate direction; first and second mechanisms mounted on the housing member for effecting displacement of the base plate in the first and second coordinate directions, respectively; a generally U-shaped stirrup member mounted on the base plate for rotation; a support plate mounted on the stirrup member for rotation about a horizontal axis; a first and preferably second instrument carriers displaceably mounted on the support plate; and a mechanism mounted on said base plate for effecting vertical displacement of the first instrument carrier.