Oculus Optikgeraete Gmbh

Gert Koest

Andreas Steinmueller

Marc Repnow

Norbert Koop

Elfriede Aulhorn

Manfred Fahle

Ralf Bartl

The invention relates to an ophthalmic analysis system for measuring the intraocular pressure in an eye comprising an actuating device for contact-free deformation of the cornea, an observation system with which the deformation of the cornea can be observed and recorded, an analysis device with which the intraocular pressure can be deduced from the image information of the observation system, wherein split images of at least parts of the undeformed and/or deformed cornea can be recorded using the observation system.

Ophthalmic analysis system for measuring the intraocular pressure in the eye

The invention relates to an ophthalmological analysis method for measuring an intraocular pressure in an eye with an analysis system consisting of an actuating device, wherein the actuating device causes a puff of air to be applied to the eye in such manner that the cornea is deformed, an observation system with which the deformation of the cornea is observed and recorded, wherein sectional images of the cornea when it is deformed and not deformed are created with the observation device, and an analysis device with which the intraocular pressure is derived from the sectional images of the cornea, wherein a structural characteristic and/or material characteristic of the cornea is derived from the sectional images of the cornea in the analysis device, wherein a stress of the cornea is derived as a structural characteristic and/or material characteristic, wherein stresses in the corneal material are rendered visible.

Ophthalmological analysis method and analysis system

The invention relates to an opthalmological analysis method for measuring an intraocular pressure in an eye with an analysis system consisting of an actuating device, wherein the actuating device causes a puff of air to be applied to the eye in such manner that the cornea is deformed, an observation system with which the deformation of the cornea is observed and recorded, wherein sectional images of the cornea when it is deformed and not deformed are created with the observation device, and an analysis device with which the intraocular pressure is derived from the sectional images of the cornea, wherein a material characteristic of the cornea is derived from the sectional images of the cornea in the analysis device, wherein a diameter dof a first applanation area of the cornea and a diameter dof a deformation area of the cornea is derived as a material characteristic.

The invention relates to an illumination system () and an illumination method for an opthalmological analysis apparatus, in particular an analysis apparatus for measuring an intraocular pressure in an eye, wherein the analysis apparatus includes an actuation device () with which a puff of air for deforming a cornea () can be applied to the eye () in the direction of an optical axis () of the eye, wherein the illumination system includes at least one illumination device () with which the cornea of the eye can be illuminated by a slit light in such a way that a sectional image () can be generated in an illumination plane coinciding with the optical axis, wherein the illumination device is formed so that an illuminating beam path () of the illumination device oriented towards the eye is arranged at an angle &#x3b1; relative to the optical axis ().

Illumination system and method

The invention pertains to a refractometer () for determining the refraction properties of an eye () of a patient

Refractometer for determining the refraction properties of an eye

The invention relates to a method and a device for determining the distance from a measurement point on a tissue surface () of the eye (), wherein

Method and device for determining the distance from a measurement point on a tissue surface of the eye

Autorefractokeratometer with integrated pachymeter

The invention relates to a measuring device () for measuring the refraction properties of optical lenses (), especially spectacle glasses, comprising a measuring light grid () for producing a plurality of light beams () which are deflected by the lens () as a result of refraction of light, and comprising a measuring light detector () on which the deflected light beams are projected and are there recorded electronically, and comprising an evaluation device in which the refraction properties of the lens () are determined from the measurement signals of the measuring light detector (), wherein a screen () comprising a plurality of light passage openings () is arranged between the lens () to be studied and the measuring light detector (), wherein the light beam () produced by the measuring light grid () and deflected at the lens () by refection of light is projected through the various light passage openings () of the screen () along separate ray paths onto the measuring light detector ().

Measuring device for measuring the refraction properties of optical lenses

The invention relates to a measuring device () for measuring the refraction properties of optical lenses (), especially spectacle glasses, comprising a measuring light grid () for producing a plurality of light beams () which are deflected by the lens () as a result of refraction of light, and comprising a measuring light detector () on which the deflected light beams are projected and are there recorded electronically, and comprising an evaluation device in which the refraction properties of the lens () are determined from the measurement signals of the measuring light detector (), wherein an additional measuring system () for electronic measurement of the geometry of the front lens surface () and/or the rear lens surface () is provided in the device, wherein the measurement result of the additional measuring system () is included in the determination of the refraction properties of the lens () in the evaluation device.

The present invention relates to a method for operating an ophthalmological analysis system having a slit projection unit for slit illumination of the eye and a Scheimpflug camera for taking digitized sectional images of the eye, slit projection unit and Scheimpflug camera being mounted so that they may pivot jointly rotating around an axis which is essentially coincident with the optical axis of the eye. In a first position of slit projection unit and Scheimpflug camera, a recording of a sectional image of the eye is made and stored as the first image data set. Subsequently, slit projection unit and Scheimpflug camera are pivoted rotating at least once and fixed in this particular subsequent (second, third, fourth, . . . ) position. In the particular subsequent (second, third, fourth, . . . ) position of slit projection unit and Scheimpflug camera, a recording of a sectional image of the eye is made and stored as the subsequent (second, third, fourth, . . . ) image data set. A multidimensional description model of at least one component of the eye is derived through image data analysis of the different image data sets in a digital image data analysis device and stored as the resulting data set. The resulting data set is output in suitable form to a data output device.

Method for operating an ophthalmological analysis system

Ophthalmologic analysis system for measuring the thickness of the corneal tissue on an eye to be examined having a projection device with which defined regions of the corneal tissue are illuminated, whereby the projection device cooperates with an observation system by means of which the illuminated regions of the corneal tissue can be observed and recorded at an angle in relation to the beam path of the projection device. A second projection device is provided on the analysis system, whereby the second projection device cooperates with a second observation system by means of which the illuminated regions of the corneal tissue are observed and recorded such that the curvature of the corneal tissue can be derived from the image information of the second observation system in the analysis device.

Ophthalmologic analysis system

A device for projecting a light beam on an object includes a light source for generating the light beam and projection optics for transmitting the light beam from the light source to the object. At least one prism with at least two essentially plane-parallel surfaces is arranged in the beam path of the light beam between the light source and the object as part of the projection optics. The prism is movably supported and can be driven by a drive unit in such a way that the light beam is shifted in a parallel fashion by an amount (X) that depends on the position of the prism when the light beam passes through the plane-parallel surfaces of the prism.

Device for projecting a light beam

The invention relates to a slit projector comprising a light source, a slit diaphragm arranged in front of the light source, and a lens system arranged in front of the slit diaphragm. Such a slit projector is used in particular in slit lamps. The front chamber of the eye can be illuminated with such slit projectors in order to be able, for example, to take pictures of the slit image of the front chamber of the eye. High performance light sources are needed for this. These are presently not available at acceptable prices. Therefore, the purpose exists to improve a slit projector in such a manner that same presents a slit of the needed brightness for viewing the eye and in particular for slit image photography. This is attained in such a manner that the light source consists of several light diodes arranged essentially in a longitudinal direction of the slit, namely in the plane of the projected slit.

Slit projector

The invention relates to a device for the examination of an eye using a Scheimpflug camera and a slit light projector for slit images of an eye. The Scheimpflug camera and the slit light projector are carried by a stand, whereby the slit light projector and the scheimpflug camera are arranged rotatably about a common axis coinciding essentially with the optic axis of the eye. Such a device is improved so that without interruptions and returns of the Scheimpflug camera to an initial position, the eye can be scanned multiply by means of the device. This is achieved by the slit light projector and the Scheimpflug camera being freely rotatable about the axis through more than 360&deg;, and by a voltage supply to both the Scheimpflug camera and the slit light projector occurring through a transmitter.

Growing community of inventors

Hannover, Germany

Gert Koest