Entries |
Document | Title | Date |
20080225231 | Device and Method for Measuring the Contrast of the Fringes in a Michelson Interferometer and System for Examination of the Eye Comprising Such a Device - The invention relates to a device, for measuring the contrast of fringes in a Michelson interferometer at full field, comprising a Wollaston prism for diverting two perpendicular incident polarisations into two different emergent directions, said diverting means being arranged within the interferometer as substitute for a single polariser. The device is of application to a Michelson interferometer used in an OCT tomographical system and comprising means for obtaining interferometric contrast without use of a modulation technique or synchronous detection methods. | 09-18-2008 |
20080239240 | OPTICAL IMAGE MEASUREMENT DEVICE - An optical image measurement device has: an interference-light generator configured to generate an interference light by splitting a low-coherence light into a signal light and a reference light and superimposing the signal light having passed through an eye and the reference light having passed through a reference object; a detector configured to detect the generated interference light; and a scanner configured to scan a projection position of the signal light on the eye, and the optical image measurement device is configured to form an image of the eye based on a result of detection by the detector. The optical image measurement device comprises a projector configured to project fixation information for fixing the eye onto a fundus oculi of the eye when the scanner scans with the signal light. | 10-02-2008 |
20080291396 | METHOD AND APPARATUS FOR OBTAINING THE DISTANCE FROM AN OPTICAL MEASUREMENT INSTRUMENT TO AN OBJECT UNDER TEST - Systems and methods for measuring a distance from a reference plane of an optical measurement instrument to a reference plane of an optical device under test are disclose. In one embodiment a system for measuring this distance includes an illumination system, an optical system, and optical sensor and a processor. The illumination system is configured or adapted to illuminate the object under test. The optical system is configured or adapted to receive light from the object under test and to produce an aberrated image. The optical sensor is configured or adapted to receive and sense the aberrated image. The processor determines the distance from the reference plane of the optical measurement instrument to the reference plane of the optical device based on an aspect of the aberrated image sensed by the optical sensor. | 11-27-2008 |
20080297723 | Correction of Presbyopia Using Adaptive Optics, Wavefront Sensor Eye Alignment and Light Shield, and Associated Methods - Devices, systems, and methods measure, diagnose, and/or treat one or both eyes of a patient. Adaptive optics systems (such as those having a deformable mirror) may be configured to an aspherical or multi-spherical presbyopia-mitigating prescriptive shape to allow objective and/or subjective measurements of a candidate prescription. A plurality of viewing distances allow subjective and/or objective evaluations of performance using a light spot or a test viewing image. Measurements of aberrations at selected viewing conditions (including distances and/or brightness) with correlating pupil sizes may also be provided. Wavefront measurement systems and methods may help position and isolate the eye from ambient light. | 12-04-2008 |
20080309875 | Instrument for measuring a refractive power - An instrument for measuring a refractive power includes a target, a target projecting unit, a measurement light projecting unit, a light receiving unit, a unit for performing a normal refractive power measurement, a judgment unit, and a unit for performing a high-speed refractive power measurement. The unit for performing a normal refractive power measurement measures a normal refractive power of an examined eye based on received light data. The judgment unit judges reliability of the received light data or the refractive power measurement. The unit for performing a high-speed refractive power measurement measures a refractive power of the examined eye faster than the unit for performing a normal refractive power measurement in response to a judgment result of the judgment unit. | 12-18-2008 |
20090021696 | DEVICE FOR MEASURING AND CORRECTING ABERRATION OF AN EYE - A device and method for measuring and correcting eye aberrations integrate wavefront sensing, wavefront aberration correction and optometric testing into one another and configure the optical paths of wavefront sensing and optometric testing as aplanatic structures, such that under optometric testing conditions both wavefront sensing and aberration correction can be performed simultaneously, and final optometric testing is conducted on wavefront aberration-corrected optometric parameters to verify if the wavefront aberration-corrected optometric parameters fall within normal visual range, thus ensuring the accuracy and high repetition of the measured optometric parameters. | 01-22-2009 |
20090073382 | Devices and Methods for Defined Orientation of an Eye - The present solution is directed to the orientation of an eye for diagnostic and/or therapeutic purposes, wherein the line of sight need not coincide with the optical axis of the examination apparatus or treatment apparatus. The invention includes a fixating light source for generating a positionable fixating mark, a device for coupling this fixating mark into a beam path of an ophthalmological apparatus whose imaging optics project the fixating mark on the eye to be examined and/or treated, and a control unit by which the image of the fixating mark can be displayed at different distances and angular positions with respect to the optical axis of the ophthalmological apparatus so that the eye to be examined and/or treated is oriented to this fixating mark by foveal focusing and occupies a defined position with respect to the optical axis of the ophthalmological apparatus. | 03-19-2009 |
20090141237 | Integrated Optical Coherence Imaging Systems for Use in Ophthalmic Applications and Related Methods and Computer Program Products - A system for imaging a sample is provided that includes an optical coherence tomography (OCT) portion having an associated OCT path. A second imaging portion is provided having an associated second image path, different from the OCT path. A fixation target having an associated fixation path, different from the second image path and the OCT path is also provided. The OCT path, the second image path and the fixation path are confocal at a common image plane. Related handheld systems are also provided. | 06-04-2009 |
20090185133 | Optical scanning device, image display device provided with optical scanning device, retinal scanning display, and driving method of optical scanning element - An optical scanning element performs scanning with light by bringing a mirror portion into a swinging state by generating resonance oscillations of the mirror portion due to torsional oscillations. The optical scanning element has a first resonance frequency and a second resonance frequency which generate longitudinal oscillations and lateral oscillations on a lower region side and a high region side of a resonance frequency of the torsional oscillations respectively. Outputting of a drive signal is started by setting a frequency of a drive signal which is used for oscillating the optical scanning element to a specific frequency which falls between the first resonance frequency and the second resonance frequency and is higher than the resonance frequency of the torsional oscillations and, thereafter, the frequency of the outputted drive signal is shifted to the resonance frequency of the torsional oscillations after outputting of the drive signal is started. | 07-23-2009 |
20090190094 | Optical system for light flux transfer, and retinal scanning display using such an optical system - The present invention provides an optical system that can reduce the occurrence of aberration, and a scanning retinal display that uses such an optical system. A first diffraction section and the second diffraction section are attached to a light guiding section in a state separated from each other. The first diffraction section diffracts light flux that is incident on it, to be incident on the light guiding section. The light guiding section guides light flux that has been diffracted by the first diffraction section to the second diffraction section using reflection inside the light guiding section. The second diffraction section re-diffracts light flux that has been guided by the light guiding section and output externally of the light guiding section. The first diffraction section, the light guiding section, and the second diffraction section are substantially symmetrical, either side of a virtual plane between the first diffraction section and the second diffraction section. | 07-30-2009 |
20090303439 | Ophthalmic apparatus - An ophthalmic apparatus has an optical system for presenting a target to an examinee's eye through a lens, an optical system placed in an optical path of the target presenting optical system, for correcting a refractive error of the eye seeing the target, a switching unit arranged to switch an aperture size of a diaphragm, which is placed in a position substantially conjugate with a pupil with respect to the lens, between a first size corresponding to a pupil size of the eye in photopic vision and a second size larger than the pupil size in scotopic vision, an inputting unit arranged to generate a signal for switching the aperture size between the first and second sizes, and a control unit arranged to control driving of the switching unit based on the signal from the inputting unit to switch the aperture size between the first and second sizes. | 12-10-2009 |
20100045934 | DYNAMIC RANGE EXTENSION TECHNIQUES FOR A WAVEFRONT SENSOR INCLUDING USE IN OPHTHALMIC MEASUREMENT - An ophthalmic error measurement system includes a projecting optical system delivering light onto a retina of an eye, a pre-correction system which compensates a light beam to be injected into the eye for aberrations in the eye, the pre-correction system being positioned in between the projecting optical system and the eye, an imaging system which collects light scattered by the retina, and a detector receiving light returned by the retina from the imaging system. Use of the pre-correction system allows the end-to-end aberrations of the ocular system to be analyzed. The use of a pre-correction system also allows use of a minimized spot size on the retina, and all of its attendant advantages. | 02-25-2010 |
20100103376 | SYSTEMS AND METHODS FOR PREDICTION OF OBJECTIVE VISUAL ACUITY BASED ON WAVEFRONT MEASUREMENTS - Methods, devices, and systems for predicting an optical acuity measure of an optical system of an eye. An optical acuity measure can be predicted by determining a point spread function based on a wavefront measurement of an eye, convolving a resolution target with the point spread function to produce an image, and predicting the optical acuity measure of the optical system of the eye based on the image. | 04-29-2010 |
20100110379 | OPTIMIZING VISION CORRECTION PROCEDURES - In one embodiment, an apparatus for optimizing vision correction procedures comprising: a narrow beam of light directed to a patient's retina; a dynamic defocus and compensation offsetting device configured to offset the defocus of a wavefront from an eye, a wavefront sensor configured to measure the local tilt of a number of subwavefronts sampled around an annular ring (the diameter of which can be dynamically changed) over the wavefront with the defocus offset; and a display device configured to display a two dimensional (2D) data points pattern in real time with each data point location representing a corresponding local tilt of the sampled subwavefronts. A proper defocus offset, not passive compensation, can reveal the predominant feature(s) of other wavefront aberration component(s), thus enabling a refractive surgeon to fine tune the vision correction procedure and minimize the remaining wavefront aberration(s) in real time. Meanwhile, by sampling the wavefront around annular rings and displaying the local tilt of the sampled subwavefronts on a monitor in the form of a 2D data points pattern, a refractive ophthalmic surgeon can easily correlate the measurement result to the two major refractive errors, namely spherical and cylinder refractive errors, including the axis of astigmatism. | 05-06-2010 |
20100118268 | OPHTHALMIC LENSES USEFUL FOR THE CORRECTION OF PRESBYOPIA WHICH INCORPORATE HIGH ORDER ABERRATION CORRECTION - The invention provides methods for designing ophthalmic lenses, and lenses produced by this method, which lenses corrects both low order and high order wavefront aberrations of the lens wearer's eyes. | 05-13-2010 |
20100238406 | FOCUS ASSISTING DEVICE - A focus assisting device is configured to assist a vision measuring system to focus on an object with smooth low-contrast surfaces. The focus assisting device includes a plurality of transparent portion and a plurality of nontransparent portion. | 09-23-2010 |
20100238407 | SYSTEMS AND METHODS FOR WAVEFRONT RECONSTRUCTION FOR APERTURE WITH ARBITRARY SHAPE - Systems, methods, and devices for determining an aberration in an optical tissue system of an eye are provided. Techniques include inputting optical data from the optical tissue system of the eye, where the optical data includes set of local gradients corresponding to a non-circular shaped aperture, processing the optical data with an iterative Fourier transform to obtain a set of Fourier coefficients, converting the set of Fourier coefficients to a set of modified Zernike coefficients that are orthogonal over the non-circular shaped aperture, and determining the aberration in the optical tissue system of the eye based on the set of modified Zernike coefficients. | 09-23-2010 |
20100328608 | STEREOMICROSCOPE - In intraocular observation of the eye, the slit lamp microscope | 12-30-2010 |
20110075097 | EYE REFRACTIVE POWER MEASUREMENT APPARATUS - An eye refractive power measurement apparatus measures both eye refractive powers in cases where a pupil is small and large in diameter with ease. This apparatus includes: a measuring optical system causing an imaging device to capture a ring-shaped image based on measurement light reflected from a fundus of an examinee's eye; a light deflecting member arranged at a position, which is not conjugated with a pupil of the examinee's eye, on an optical path of the measuring optical system; a rotor causing the light deflecting member to rotate about an optical axis of the measuring optical system; and an eccentricity amount changer changing an amount of eccentricity of the measurement light, which is rotated eccentrically on a surface of the pupil, with respect to a center of the pupil, in order to change a region, where the measurement light passes, on the surface of the pupil. | 03-31-2011 |
20110128498 | EYE REFRACTIVE POWER MEASUREMENT APPARATUS - An eye refractive power measurement apparatus includes a measurement optical system, a calculator and an output unit. The measurement optical system projects measurement light onto a fundus of an examinee's eye, extracts the measurement light reflected on the fundus as ring-shaped light, and causes an imaging device to capture a ring-shaped image. The calculator measures eye refractive power of the examinee's eye, based on the ring-shaped image captured by the imaging device, specifies a position of the ring-shaped image to calculate a measured line of the image, performs approximate processing on the measured line to calculate an approximate curve, and calculates a displacement between the measured line and the approximate curve in a meridian direction for each divided region. The output unit outputs a measurement result of the eye refractive power and a calculation result of the displacement in each divided region. | 06-02-2011 |
20110255054 | DEVICE FOR SWEPT-SOURCE OPTICAL COHERENCE DOMAIN REFLECTOMETRY - A device for swept-source optical coherence domain reflectometry (SS OCDR) on moveable samples, particularly human eyes, for obtaining A-scans, having a measuring range according to the sample length and having a laser light source which can be adjusted by a main wave number k | 10-20-2011 |
20110279777 | System and Method for Illumination and Fixation With Ophthalmic Diagnostic Instruments - An eye measurement system may include a target that moves transverse to an optical path from the target to eye, so as to relax accommodation of the lens of the eye. The target may move transverse to the optical path on a display. The patient may be fogged while the target moves transverse to the optical path, and the target may become smaller such that the patient perceives the target to be moving away from the patient. A pupil camera may measure eye position that can be correlated with the position of the target on the display to determine that the patient has maintained fixation on the moving target. A visible measurement light beam may be pulsed subsequent to and/or during motion of the target that relaxes accommodation of the eye so as to avoid visual interference of the measurement light beam with the target on the display. | 11-17-2011 |
20110304822 | OPHTHALMOLOGICAL MEASURING DEVICE AND MEASUREMENT METHOD - An ophthalmological measuring device for determining geometric structures in an eye includes an optical, triangulating measurement system for determining at least one geometric reference in the eye by triangulation, and an optical, interferometric measurement system for determining geometric detailed structures in the eye by optical interferometry. The measuring device is designed to position the geometric detailed structures determined by the interferometric measurement system on the basis of the at least one geometric reference in the eye determined by the triangulating measurement system. This firstly allows the interferometric measurement system to register geometric detailed structures in the eye with a high optical resolution and at places that are not visible to the triangulating measurement system, and secondly allows the positioning of said geometric detailed structures in the eye on the basis of geometric references that are determined by the triangulating measurement system without significant movement artifacts. | 12-15-2011 |
20120002167 | OPHTHALMIC APPARATUS - 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. | 01-05-2012 |
20120057130 | OPHTHALMOLOGIC APPARATUS - Provided is an ophthalmologic apparatus capable of measuring a refractive state in a state where a pupil diameter dimension varies with respect to an eye to be examined, the ophthalmologic apparatus including a measurement optical system capable of measuring distribution of an optical characteristic within a pupil diameter of the eye to be examined, the ophthalmologic apparatus including a visible light illuminator for illuminating the eye to be examined with visible light along an optical axis of the measurement optical system. The visible light illuminator is configured to be capable of changing an illuminating light intensity in a range including at least from a light intensity capable of exposing the eye to be examined to brightness equivalent to that, in a nighttime environment to a light intensity capable of exposing the eye to be examined to brightness equivalent to that in a daytime environment. | 03-08-2012 |
20120188511 | METHOD AND ANALYSIS SYSTEM FOR MEASURING THE GEOMETRY OF THE EYE - The invention relates to an ophthalmic analysis system and a method for measuring a geometry of an eye to be examined using the ophthalmic analysis system that comprises a first interferometric analysis system and a second non-interferometric analysis system. The first analysis system is used for obtaining measured data on optical boundary surfaces of the eye located on a measurement axis, and measured data describing relative distances, and the second analysis system is used for obtaining at least one set of image data on optical boundary surfaces located on the measurement axis. A processing device of the ophthalmic analysis system processes the measured data and the set of image data and corrects the set of image data using the measured data. | 07-26-2012 |
20130038836 | PORTABLE PATTERN-GENERATING OPHTHALMIC PROBE - A pattern-generating intraocular probe is provided that includes a cannula including a diffractive optical element (DOE), the DOE being patterned such that an on-axis illumination of the DOE produces an emitted beam forming a linear pattern; and a handpiece connected to a proximal of the cannula. | 02-14-2013 |
20130128227 | SYSTEMS AND METHODS FOR NONINVASIVE ANALYSIS OF RETINAL HEALTH AND FUNCTION - A method for noninvasive analysis of a retina includes exposing the retina to one or more first sets of at least three illumination light signals. The at least three illumination light signals each have a different wavelength. The method also includes optically collecting a reflected light signal for each of the at least three illumination light signals of the one or more first sets. Each of the reflected light signals is a portion of the respective illumination light signal reflected by the retina. The method further includes detecting the reflected light signals of the one or more first sets as a function of intensity. The method still further includes determining a first opsin density using the detected intensity of each of the reflected light signals of the one or more first sets. | 05-23-2013 |
20130135585 | DIAGNOSTIC DEVICE FOR DETECTING A LAYER BOUNDARY IN AN EYE AND RING ELEMENT FOR THE DIAGNOSTIC DEVICE - The aim of the present invention is to propose a diagnostic device for detecting a layer boundary which facilitates the determination of layer thicknesses in the human eye. For this purpose, a diagnostic device | 05-30-2013 |
20130208243 | OPHTHALMOLOGIC APPARATUS, METHOD FOR CONTROLLING OPHTHALMOLOGIC APPARATUS, AND STORAGE MEDIUM - 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. | 08-15-2013 |
20130222765 | CONTACT LENS OPTIMIZER - Vision testing methods and apparatuses are disclosed, the methods including measuring the modulation to a wavefront of light imparted by a contact lens, determining the wavefront modulation necessary to emulate the optical properties of the lens as worn on a patient's eye, generating a static or dynamic image viewable by a patient, modulating the wavefront of the image remote from the patient to attain the wavefront necessary to emulate the optical properties of the lens as worn on a patient's eye, and relaying the wavefront to a plane nearby, on, or within the patient's eye. The apparatuses include devices for measuring the modulation to a wavefront of light imparted by a contact lens, determining the wavefront modulation necessary to emulate the optical properties of the lens as worn on the patient's eye, generating a static or dynamic image viewable by a patient, modulating the wavefront of the image remote from the patient to attain the wavefront necessary to emulate the optical properties of the lens as worn on the patient's eye, and relaying the wavefront to a plane nearby, on, or within the patient's eye. | 08-29-2013 |
20130321773 | Optometric Automatic Test Device and Method - An optometric automatic test device and method for a lens are provided to perform image capturing and reading with an image analysis technique, perform automatic focusing by automated control technology rather than by the test worker's operation, and enable two tests, namely refractive power test and astigmatism test, to be performed on eyeglass lenses automatically, so as to greatly reduce the errors caused by the test worker's operation and enhance test efficiency. | 12-05-2013 |
20140092361 | NON-CONTACT TYPE TONOMETER - A non-contact type tonometer includes: a measurement unit including a first measuring unit for measuring an eye pressure of an examinee's eye in a non-contact manner and a second measuring unit for measuring a corneal thickness of the examinee's eye in a non-contact manner; a moving mechanism for causing relative movement of the measurement unit with respect to the examinee's eye; a drive controller for driving the moving mechanism for aligning the measurement unit; and a setting switch controller for switching an alignment reference on the cornea used for aligning the measurement unit between first and second alignment references. The first alignment reference is a reference for measuring the eye pressure with the first measuring unit and the second alignment reference is a reference for measuring the corneal thickness with the second measuring unit and set closer to a corneal rear surface than the first alignment reference. | 04-03-2014 |
20140111772 | OPHTHALMOLOGIC APPARATUS - An ophthalmologic apparatus includes a projection optical system configured to project a light flux on a subject's eye, a beam splitting member configured to form a split optical path corresponding to a light flux from a subject's eye, and an image-forming optical system configured to receive via the beam splitting member a light flux from the subject's eye, the image-forming optical system including an optical element having an optical characteristic that reduces astigmatism generated by the beam splitting member. | 04-24-2014 |
20140132929 | OPHTHALMOLOGIC APPARATUS, OPHTHALMOLOGIC EXAMINATION METHOD, AND PROGRAM - Provided is an ophthalmologic examination method including a first control step of driving a focus unit based on an index image acquired by projecting an index to an eye to be inspected in a state of setting light intensity for illuminating the eye to be inspected to a first light intensity, a second control step of driving the focus unit based on the index image acquired in a state of setting the light intensity to a second light intensity higher than the first light intensity, and a memory step of storing specific information on the eye to be inspected during the first control step and the second control step. The second control step is executed after driving the focus unit to a position stored in the memory step in the case of storing again the specific information after storing the specific information. | 05-15-2014 |
20140132930 | OPHTHALMOLOGIC APPARATUS, CONTROL METHOD - An ophthalmologic apparatus includes a focusing lens provided in an optical path connecting a subject's eye and an imaging unit, a diopter correction lens provided in the optical path to be insertable and removable, and a position determination unit configured to determine a position of the focusing lens on the optical path in a state where the diopter correction lens is inserted, based on an in-focus state where the diopter correction lens is not inserted. | 05-15-2014 |
20140152958 | Eye Refractive Power Measuring Apparatus and Calibration Method of Eye Refractive Power Measuring Apparatus - An eye refractive power measuring apparatus includes a light projecting optical system, a light receiving optical system, a focusing unit, a calibration optical system, a focus control unit, and an arithmetic unit. The arithmetic unit, based on a relation of a control signal obtained when a calibration beam is projected and a calibration value that is an output of a light receiving unit, and a correlation of a calibration value obtained in advance and eye refractive power, calculates a correlation of the control signal and the eye refractive power, and, based on a control signal obtained when measuring beam is projected, a measured value that is an output of the light receiving unit, and the correlation, calculates the eye refractive power. | 06-05-2014 |
20140232989 | EYE FIXATION SYSTEM AND METHOD - An eye fixation system for attention-attracting fixation of a user's eye includes an audio system configured to play sound based on audio signals to be audible to a user so as to attract the user's attention, and a target display system configured to communicate with the audio system to receive the audio signals and to display an optical target to be viewed by the user. The target display system includes an optical modulator configured to modulate the optical target based on the audio signals. A method of assisting a subject to fix at least one of his eyes in a predetermined alignment includes playing sound that is audible to the subject, displaying an optical target to be viewed by the subject synchronously with the sound such that the target is viewable by the subject while the sound is audible to the subject, and modulating the optical target based on the sound while the sound is being played. | 08-21-2014 |
20140268056 | WAVEFRONT INTERACTIVE REFRACTION DISPLAY - Embodiments of this invention generally relate to systems and methods for wavefront interactive refraction display and more particularly to systems and methods for capturing and displaying eye wavefront interactive refraction data based on the desired refractive state of the patient's eye. | 09-18-2014 |
20140313484 | WAVEFRONT GENERATION FOR OPHTHALMIC APPLICATIONS - Embodiments of this invention relate to the generation of wavefronts for measurements, diagnostics, and treatment planning for ophthalmic applications. In some embodiments, a wavefront generator generates light having a uniform wavefront, which is focusable on the retina of an emmetropic eye by the normal function of the emmetropic eye. In some embodiments, the wavefront generator can generate light having a custom wavefront which is not focusable on the retina of the emmetropic eye. In some embodiments, the wavefront generator can receive information relating to an optical aberration of the eye, generate a custom wavefront, and project light having this custom wavefront, which in combination with the optical aberration of the eye is focusable on the retina. | 10-23-2014 |
20140313485 | OPHTHALMIC DEVICE, CONTROL METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM - Provisioned is a selecting unit configured to select a bright spot image corresponding to a reflected light beam reflected by the cornea of the subject eye from among a plurality of bright spot images on the basis of a positional relationship between a first bright spot image formed from a plurality of bright spot images corresponding to a first light beam in a first direction and a second bright spot image corresponding to a second light beam in a second direction different than the first direction, and a calculating unit configured to calculate a state of alignment between the subject eye and a measuring unit using the bright spot image selected from the first bright spot images. | 10-23-2014 |
20140313486 | FUNCTIONAL VISION TESTER - A vision testing device includes a hood having an interior space defining a first side and a second side. A first electronic device is operable to project a first image to the first side and a second electronic device is operable to project a second image to the second side. The first image and the second image comprise computer-generated images. A mirror extends from the first side to the second side and is positioned to reflect the first image and the second image. A first viewing lens is in optical communication with the first side and is configured to receive the first image reflected from the mirror. A second viewing lens is in optical communication with the second side and is configured to receive the second image reflected from the mirror. | 10-23-2014 |
20140333896 | OPHTHALMIC APPARATUS, ANALYSIS PROGRAM, OPTIC MEDIA OPACITY ACQUIRING METHOD, AND FLUORESCENCE INTENSITY ACQUIRING METHOD - An ophthalmic apparatus includes: a light projecting optical system to project light to each point on a fundus of an examinee's eye; a light receiving optical system including a light receiving element to receive light from the fundus emitted from each point on the fundus resulting from the light projected from the light projecting optical system; and a controller for controlling the ophthalmic apparatus, wherein the controller is configured to: acquire intensity information representing intensity of the light from the fundus corresponding to each point on the fundus based on a result of received light of the light receiving element; and analyze a degree of opacity in an optic media of the examinee's eye based on the intensity information. | 11-13-2014 |
20140333897 | UNIVERSAL OBJECTIVE REFRACTION - The determination of objective refraction data for an eye of a spectacle wearer, wherein based on measured data for the eye of the spectacle wearer, which determine at least one first set of Zernike coefficients of a wave front aberration for a long accommodation and a second set of Zernike coefficients of a wave front aberration for a short accommodation of the eye, objective refraction data for sphere (Sph | 11-13-2014 |
20140368794 | OPTIMIZING VISION CORRECTION PROCEDURES - In one embodiment, a wavefront sensor is combined with a slit lamp eye examination device so that real time aberration values of an eye being examined can be viewed during a slit lamp eye examination session. | 12-18-2014 |
20150085254 | Micro-Display Based Slit Lamp Illumination System - Methods and apparatuses for a micro-display based slit lamp illumination system are provided. A first optical element is configured to generate a micro-display image including an illuminated area. A second optical element is configured to receive the micro-display image, and focus the micro-display image upon an eye to be examined, wherein light is reflected from the eye as a result of the illuminated area. | 03-26-2015 |
20150131054 | PROCESS AND APPARATUS FOR DETERMINING OPTICAL ABERRATIONS OF AN EYE - A process and an apparatus are proposed for determining optical aberrations of an eye with its optical system including the cornea and the lens. The process includes the reconstructing of wavefront aberrations of the eye as a deviation of the wavefront, determined by the optical system of the eye with a process of aberrometry, with respect to an ideal planar wavefront generated by an aberration-free eye model. A measured ocular length is employed for the aberration-free eye model. | 05-14-2015 |
20150313463 | ABERROMETER (OR THE LIKE) HAVING AN ASTIGMATIC TARGET - A method and a device for stimulating accommodation of at least one eye of a test person. There is a reliable possibility for determining a set of ophthalmological data relating to at least one eye of the test person and particularly for measuring refractive error of the test person and for determining a corresponding optical correction. The device for determining a set of ophthalmological data relating to at least one eye of a test person, in particular a device for objectively determining refraction comprises: an accommodation stimulating device which is designed to project a virtual target having a spherical effect and having an adjustable cylindrical effect into the at least one eye of the test person; and a measuring device for determining ophthalmological data relating to the at least one eye of the test person. | 11-05-2015 |
20150342454 | OPTOMETRY APPARATUS AND METHOD FOR SUBJECTIVE MEASUREMENT USING OPTOMETRIC CHART - An optometry apparatus includes an eye chart presentation optical system that presents an optometric chart to an eye to be examined as a subjective eye chart for subjective measurement and a control unit that controls the eye chart presentation optical system to present the optometric chart. The control unit executes an instant presentation of the optometric chart by controlling the eye chart presentation optical system to finish presenting the optometric chart when an instant presentation time has elapsed after starting presenting the optometric chart. | 12-03-2015 |
20160135681 | Methods for Objectively Determining the Visual Axis of the Eye and Measuring Its Refraction - Provided herein are methods for objectively determining a visual axis of an eye. An optical axis of a measuring instrument is aligned with an unambiguously determinable axis of the eye which is the pupillary axis crossing the vertex of an anterior surface of a cornea and perpendicular to the vertex. A wave front tilt of radiation of a set of narrow laser beams backscattered from the retina is calculated as a tilt component in a polynomial that describes the wave front. The visual axis is reconstructed from a set of chief rays exiting from the eye after crossing nodal points of the optical system of the eye. | 05-19-2016 |
20160174832 | APPARATUS AND METHOD FOR FIXATION MEASUREMENT WITH REFRACTION ERROR MEASUREMENT USING IMAGE SENSING DEVICES | 06-23-2016 |
20160174838 | OPTOMETRIC INSTRUMENT WITH ALIGNMENT MEANS AND METHOD FOR ALIGNING AN OPTOMETRIC INSTRUMENT | 06-23-2016 |
20170231820 | Zero Parallax Visual Axis Glasses For Corneal Pre-Marking | 08-17-2017 |