230 results about "Ophthalmological device" patented technology

The invention provide a new lens curing method for making hydrogel contact lenses. The new lens curing method is based on actinically-induced step-growth polymerization. The invention also provides hydrogel contact lenses prepared from the method of the invention and fluid compositions for making hydrogel contact lenses based on the new lens curing method. In addition, the invention provide prepolymers capable of undergoing actinically-induced step-growth polymerization to form hydrogel contact lenses.

An ophthalmological implant including a layer of pharmaceutical agent and an overlying layer of a bioerodible material, a biodegradable material a bioavailable material or a mixture thereof.

An ophthalmologic apparatus includes a first changing unit configured to change a size of an aperture of a diaphragm arranged in an optical path connecting a subject's eye and a light source and in a position conjugate with a pupil of the subject's eye, and a second changing unit configured to, if a signal for instructing the first changing unit to change the size of the aperture from a first size to a second size smaller than the first size is output to the first changing unit, change an amount of light of a fixation target image projected onto the subject's eye from a first light amount to a second light amount smaller than the first light amount.

An optical coherence tomography apparatus based on spectral interference where object information can be speedily obtained and an information acquisition range in a depth direction can be enlarged, and an ophthalmic apparatus. The apparatus includes a first optical system for projecting light with short coherence length onto an object to form object light which is reflection light from the object, a second optical system for projecting light with short coherence length onto a reference surface to form reference light which is reflection light from the surface, an optical system for synthesizing the object light and the reference light to be interference light, dispersing the interference light into predetermined frequency components and photo-receiving the dispersed light with a photodetector, a device varying a spectral characteristic when the interference light is dispersed by the interference / dispersion / photo-receiving optical system, and a calculation part obtaining the information based on an output signal from the photodetector.

Opthalmic devices, particularity intraocular lenses (IOL), with improved contrast sensitivity and methods of making same. In one aspect, blue light blocking chromophores (BLBC) are diffused into, e.g. an IOL lens body to create a BLBC gradient in the lens. Orange dyes are preferred BLBCs.

A lens driver or lens driver circuitry for an ophthalmic apparatus comprising an electronic system which actuates a variable-focus optic is disclosed herein. The lens driver is part of an electronic system incorporated into the ophthalmic apparatus. The electronic system includes one or more batteries or other power sources, power management circuitry, one or more sensors, clock generation circuitry, control algorithms and circuitry, and lens driver circuitry. The lens driver circuitry includes one or more power sources, one or more high voltage generators and one or more switching circuits.

For reducing a time utilized in an AO process, provided is a deformable mirror system, including: a deformable mirror capable of changing a shape of a reflecting surface by a deformation amount in accordance with an input signal; a light wavefront measurement apparatus configured to measure a light wavefront shape of reflected light from the deformable mirror; a conversion factor calculation apparatus configured to calculate a conversion factor used in obtaining the input signal from a variation in light wavefront shape of the reflected light with respect to a change in input signal; a shape difference calculation apparatus configured to calculate a shape difference between the light wavefront shape measured by the light wavefront measurement apparatus and a light wavefront shape calculated from the input signal; and a conversion factor update unit configured to update the conversion factor in accordance with the calculated shape difference.

An ophthalmic apparatus for examining an eye of a patient, comprises: a light projecting optical system for projecting examination light onto the eye, the optical system including: a light source; and a projection shape forming device which is electrically controlled to change a reflecting area of a reflecting surface or a transmitting area of a transmitting surface and is arranged to reflect or transmit the examination light emitted from the light source while forming a projection shape of the examination light into a desired shape so that the examination light of the desired shape is projected onto the eye; and a selection unit for selecting the projection shape of the examination light; and a control part which drivingly controls the forming device based on the selected projection shape.

To accurately detect a movement of an object based on an image distorted by the movement of an eye to be inspected, which is acquired by a scanning imaging system, provided is an ophthalmologic apparatus including: an extraction means for extracting a plurality of characteristic images from a first fundus image of the eye to be inspected; a fundus image acquisition means for acquiring a second fundus image of the eye to be inspected during a period different from a period during which the first fundus image is acquired; and a calculation means for calculating at least a rotation of movements of the eye to be inspected based on the plurality of characteristic images and the second fundus image.

An ophthalmic apparatus and a method for calculating internal refractive power distribution of an eye of an examinee, which allow easily evaluating refractive power distribution of a crystalline lens, an intraocular lens and the like. The ophthalmic apparatus has a unit which inputs respective measurement data on corneal refractive power distribution and whole refractive power distribution of the eye, the respective distribution referring to a reference axis, and a unit which obtains the internal refractive power distribution of the eye referring to the reference axis based on the inputted respective measurement data, obtains a prism component in the internal refractive power distribution with respect to the reference axis, and obtains internal refractive power distribution of the eye where the prism component is removed.

An ophthalmic apparatus includes: a fundus observation optical system for observing a fundus; a target presenting device including a scanning member for two-dimensionally scanning a visible laser beam emitted from a laser source, the device being configured to control emission of the laser source during two-dimensional scanning by the scanning member to project predetermined target on the fundus under observation through the fundus observation optical system; and control means to change an irradiation diameter of the laser beam by inserting / removing an optical member into / from an irradiation optical path of the laser beam or moving the optical member in an axial direction and to change resolution of the target by changing each scan range of the laser beam by the scanning member according to the changed irradiation diameter of the laser beam. Accordingly, in the ophthalmic apparatus used in close and face-to-face position to an examinee, the size and shape of a target to be presented can be easily set. A test target with high resolution unrealizable by a conventional LCD can be presented.

An opthalmologic device and an opthalmologic measuring method in accordance with an embodiment of the present application in which, cross-sectional images of cross-sectional portions illuminated from different instrument positions by a light projector are captured in Scheimpflug configuration. Furthermore, corresponding top view images are also captured from the different instrument positions. At least one reference section and at least one comparative section are extracted from an initial instrument position or from an advanced instrument position, respectively. The displacement between the reference section and the comparative section is determined and the cross-sectional images are positioned relative to one another, based on the displacement. A coherent examination of the entire eye is made possible in which the relative movements of the eye with respect to the device, particularly rotational movements, are taken into consideration.

An ophthalmic apparatus comprises: aberration correction unit arranged to correct aberration of at least one of irradiating light directed to an eye to be examined and return light from the eye; light-receiving unit arranged to receive, as return light from the eye, the light whose aberration is corrected by the aberration correction unit and then which irradiates the eye; measurement unit arranged to measure the aberration of the return light; and control unit arranged to control the aberration correction unit based on a measurement result obtained by the measurement unit and a light reception result obtained by the light-receiving unit.

A method of making an ophthalmological implant by applying a layer of pharmaceutical agent and an overlying layer of a bioerodible material, a biodegradable material, a bloavailable material or a mixture thereof, the overlying layer having variable thickness and being dimensioned for prolonged release of the pharmaceutical agent from the implant as the overlying layer degrades.

An ophthalmological apparatus (1) for breakdown of eye tissue includes a base station (2) with a light source (21) for generating light pulses and a support arm (3), with an application head (4) that can be placed onto an eye (6) mounted on the base station (2). The light pulses are transmitted from the base station (2) to the application head (4) through an optical transmission system (22). The application head (4) has a light projector (41) for focused projection of the light pulses for punctiform breakdown of eye tissue. The support arm (3) is of rigid design and, at one end, has a hinge (Rz) with a horizontally oriented rotation axis (rz), the hinge (Rz) being mounted in such a way that the application head (4) can be placed onto the eye (6) with a rotation (zrot) extending about the rotation axis (rz).

An ophthalmological apparatus (1) for treating eye tissue (3) with laser pulses (P) comprises a laser source (100, an optical projection system (20) for projecting the laser pulses (P) onto the eye tissue (30), and a coupling part (12) for attaching mechanically to the optical projection system (20) an ophthalmological patient interface device (27) which is in contact with the eye (3) during treatment. The ophthalmological apparatus (1) further comprises a detector (13) for determining a device identifier (22) associated with the ophthalmological patient interface device (27), and a control module (14) for controlling the ophthalmological apparatus (1) using the device identifier (22). The detector makes it possible to use and detect different types of ophthalmological patient interface devices (27) and to adapt automatically the treatment of the eye tissue (30), depending on the ophthalmological patient interface device (27) that is presently attached to the ophthalmological apparatus (1).

An ophthalmic apparatus includes an irradiation unit configured to irradiate a subject's eye with a measurement beam scanned by a scanning unit, an acquisition unit configured to acquire an image of the subject's eye based on a return beam returned from the subject's eye, of the measurement beam irradiated by the irradiation unit, and a calculation unit configured to calculate a blood flow velocity of the subject's eye based on a displacement between a position of a blood cell in a first image obtained by the acquisition unit and a position of the blood cell in a second image obtained by the acquisition unit at a different time from the first image and on a difference between time when an image of the blood cell in the first image is obtained and time when an image of the blood cell in the second image is obtained.

An ophthalmic apparatus includes an aberration correction unit which corrects aberration occurring in light irradiating an eye to be examined; and a common optical system which is commonly provided for an optical path of irradiated light on the aberration correction unit and an optical path of reflected light from the aberration correction unit. The common optical system includes at least one optical element, and areas through which the irradiated light and the reflected light respectively pass overlap each other on the optical element.

An ophthalmic apparatus comprises: an image obtaining unit configured to obtain a fundus image of an eye to be examined; an information obtaining unit configured to obtain, from the fundus image, information about the eye to be examined; a fixation target display unit configured to display a fixation target pattern; and a change unit configured to change, in accordance with the information about the eye to be examined, the fixation target pattern displayed by the fixation target display unit.

An ophthalmic apparatus capable of providing a printout of measurement results on a plurality of different eye characteristics in a required format. An ophthalmic apparatus capable of measuring a plurality of different eye characteristics of an eye of an examinee simultaneously or successively has a printer for providing a printout of a first measurement result on a first eye characteristic and a second measurement result on a second eye characteristic on predetermined paper, including a printing part which performs printing on the paper and a cutting part which cuts the paper, and a control part which controls the printing part to separately print the first measurement result in a first printing area of the paper and the second measurement result in a second printing area of the paper, and controls the cutting part to cut the paper so that the first printing area and the second printing area are separated.

The invention relates to an ophthalmic apparatus, and a method of controlling ophthalmic apparatus. The ophthalmic apparatus comprises: a first optical system which irradiates the same region on a retina with a plurality of illumination light beams through separate positions on a pupil of an eye to be examined; and image generation means for generating a two-dimensional image of the retina based on return light from the eye.

An ophthalmic apparatus comprising: an acquisition unit configured to acquire a first fundus image of an eye and a second fundus image of the eye; a first generation unit configured to generate, by performing processing of enhancing contrast of a first, characteristic region of a part of the first fundus image, an image which corresponds to the first characteristic region; a second generation unit configured to generate, by performing processing of enhancing contrast of a second characteristic region of a part of the second fundus image which corresponds to the first characteristic region, an image which corresponds to the second characteristic region; and a correction unit configured to correct an acquisition position of a tomographic image of the eye based, on a positional displacement between the images which respectively correspond to the first and second characteristic regions.

Provided is an image processing apparatus capable of solving a problem that a curvature of an acquired retina image varies in accordance with a working distance (WD) when the retina image is acquired by an OCT apparatus. The image processing apparatus includes: an image acquiring unit configured to acquire a tomographic image of a fundus of an eye to be inspected; a calculating unit configured to calculate a working distance, based on a predetermined layer of the tomographic image, a coherence gate position, and an axial length of the eye to be inspected, at a time when the tomographic image is acquired; and a correcting unit configured to correct the tomographic image based on the working distance.

A lens driver or lens driver circuitry for an ophthalmic apparatus comprising an electronic system which actuates a variable-focus optic is disclosed herein. The lens driver is part of an electronic system incorporated into the ophthalmic apparatus. The electronic system includes one or more batteries or other power sources, power management circuitry, one or more sensors, clock generation circuitry, control algorithms and circuitry, and lens driver circuitry. The lens driver circuitry includes one or more power sources, one or more high voltage generators and one or more switching circuits.

Provided is an ophthalmologic apparatus capable of executing accurate automatic alignment even for an eye having an intraocular lens (IOL) implanted therein. The ophthalmologic apparatus includes: an optical system including a light beam projecting unit for projecting a light beam to an eye to be inspected, and a light receiving unit for receiving a reflection light beam from the eye to be inspected; a detecting unit for detecting a plurality of bright spot images from the reflection light beam received by the light receiving unit; and a calculating unit for calculating an alignment status between the eye to be inspected and the optical system based on the detected plurality of bright spot images. The ophthalmologic apparatus is further provided with a selection unit for selecting bright spot images to be used for the calculation by the calculating unit, from among the plurality of bright spot images.

An ophthalmologic apparatus includes an acquisition unit configured to acquire information about a pupil of a subject's eye, and a control change unit configured to change a method of fogging control for moving a fixation target image away from the subject's eye according to the information acquired by the acquisition unit.

The present invention provides an opthalmologic apparatus that can noninvasively measure the state of the lacrimal layer formed on the cornea surface and that can quantitatively measure the state of the lacrimal layer without utilizing a reflection image from the retina.The opthalmologic apparatus according to the present invention comprises an optical projection system for projecting light of a specified pattern onto a cornea surface, and an imaging device for photographing a reflection image of the projected light from the cornea surface. An operating unit calculates the degree of distortion of the reflection image on the basis of the density value distribution of the image photographed by the imaging device. The operating unit can determine the state of the lacrimal layer using the calculated degree of distortion.

An ophthalmic apparatus and a method for calculating internal refractive power distribution of an eye of an examinee, which allow easily evaluating refractive power distribution of a crystalline lens, an intraocular lens and the like. The ophthalmic apparatus has a unit which inputs respective measurement data on corneal refractive power distribution and whole refractive power distribution of the eye, the respective distribution referring to a reference axis, and a unit which obtains the internal refractive power distribution of the eye referring to the reference axis based on the inputted respective measurement data, obtains a prism component in the internal refractive power distribution with respect to the reference axis, and obtains internal refractive power distribution of the eye where the prism component is removed.