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Objective type

Subclass of:

351 - Optics: eye examining, vision testing and correcting

351200000 - EYE EXAMINING OR TESTING INSTRUMENT

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
351206000 Including eye photography 535
351221000 Including illuminator 123
351209000 Including eye movement detection 103
351211000 Including projected target image 55
351219000 With contact lens 23
351214000 Including diaphram or slit 15
351216000 Including lens selectively insertable in optical path 11
351213000 Including light filter or absorber 9
351215000 Including light polarizing means 7
Entries
DocumentTitleDate
20100097572Deforming method for deformable mirror, aberration compensation method for optical apparatus, aberration compensation method of ocular fundus observation apparatus, aberration compensation apparatus, optical apparatus and ocular fundus observation apparatus - A deforming method for a deformable mirror having plural electrodes and a reflective membrane which are distorted by static voltages. The Zernike voltage template used to deform a deformable mirror is adapted for aberration correction by calibrating each component template according to the specificity of the mirror. The voltages applied to the electrodes to form a surface profile of the reflective membrane are measured based on the reflection light from the membrane. A certain number of voltage-by-electrode patterns each of which corresponds to a different reference profile of the reflective membrane and specifies each set of a voltage and an electrode to which the voltage is to be applied are stored preliminarily. The reflective membrane is deformed to a desired profile by superposing preliminarily stored voltage-by-electrode patterns. The deformation of the mirror is corrected by calibrating each template according to the operational environment.04-22-2010
20110199575NON-REFLECTIVE IMAGING OPTICS FOR OPTICAL DEVICES, PARTICULARLY IN OPHTHALMOLOGY - Imaging optics for optical devices, with which reflections of the illumination light, which is guided through the same optical elements as the observation light, are kept from reaching the observation pupil of the imaging beam path. The non-reflective imaging optics include at least two refractive optical elements, which are utilized for illumination as well as observation. The at least two refractive optical elements are designed approximately wedge-shaped and are tilted at a random azimuth angle of at least 5° and/or are positioned off-center in the beam path to block out the single reflections of the illumination, occurring at the optical system surfaces, for the observation. The imaging optics are for optical devices, particularly in ophthalmology thought the invention is applicable to other ophthalmological devices as well as to optical devices outside of this field.08-18-2011
20100103372LASER CONTROL WITH PHASE PLATE FEEDBACK - An ophthalmic imaging system includes a light source, focusing optics, compensating optics, and a computer that coordinates both of the optics to optimize the Diffraction Limited Point Spread Function (DL-PSF) of the imaging light beam. In detail, the compensating optics includes a customized phase plate that provides substantially complete compensation for static aberrations introduced by an eye into the imaging light beam. Further, the computer measures an operational error signal that results from dynamic aberrations. The computer then uses the error signal to control the compensating optics and thereby optimize the DL-PSF by compensating for both static and dynamic aberrations. For an alternate embodiment, an active mirror can be included in the compensating optics to provide additional compensation for the dynamic aberrations.04-29-2010
20080198328System and method self enabling customers to obtain refraction specifications for, and purchase of, previous or new fitted eyeglasses - A system and method for obtaining a sight screening as well as previous and current optical prescriptions (specifications) for virtual try-on and purchase of glasses and contact lenses operated by one's self, through a voice-activated response self-refraction, or a technician/optician assisted refraction, at a convenient location or possibly several different customer diagnostic, electronic store locations where digital instruments interface and may transfer either directly back to the customer, or to a remote, interactive audio-video diagnosing and assisting, consulting eye doctor (ophthalmologist or optometrist) who interprets the digital data, diagnoses, consults, delivers health care, and authorizes the specifications, whereby the store technician/optician gathers data for purchase and electronically sends the data to a lens lab for fabrication and delivery of glasses or contact lenses to the store or directly to the customer; and, the customer can purchase selected glasses or contact lenses from any internet PC address, whereby the technician provides the customer with a CD containing customer data and digital imaging for reorders either through a PC or a selected retail location.08-21-2008
20090091706Simultaneously multi-temporal visual test and method and apparatus therefor - A method for determining a likelihood of a visual deficit in a subject uses a simultaneously multi-temporal visual test. At least two visual patterns are simultaneously displayed to the subject. Each pattern reverses in contrast or color at a different display frequency, and each pattern is displayed to a different region of the subject's visual field. Electrical activity of the brain of the subject is captured and sampled, and one or more frequency components are resolved from the resulting signal, where each frequency component corresponds to a different display frequency. The method then involves determining from the frequency components, optionally by comparison between the eyes, a measurement of a likelihood that a visual deficit exists in a particular area.04-09-2009
20100091242System and process for recording ERG, PERG and VEP multifocal electrofunctional responses in real-time - Process and system for determining the topography of bioelectric response signals of a visual system including a patient's retina, optical nerve or a projection thereof at the level of the central cortex, following visual stimulation through a surface arranged in front of the patient's eye. An image which comprises a plurality of cells is displayed as stimulation, each cell being activated or deactivated according to a corresponding digital time function represented by a cyclical succession of binary m-sequences of duration (T) formed from a plurality of activation symbols (N), each having a duration (Ts), the m-sequences of the various cells being obtained cyclically from a mother m-sequence. The process determines the total bioelectric response of the visual system, the response associated with each cell being determined by the total response of the visual system using a cross-correlation with a suitable translated version of a mother m-sequence. The calculation of the response of each cell is updated at the end of each symbol time (Ts), thereby making it possible to follow the evolution of the calculated response of each cell in real-time, without awaiting the end of an m-sequence.04-15-2010
20090237614APPARATUS AND METHOD FOR ASSESSING RETINAL DAMAGE - The invention administers an objective clinical test to an eye that measures the visual sensitivity of the superior retina and the inferior retina, by alternately presenting a stimulus pair comprising a shaped superior light stimulus and a shaped inferior light stimulus that are horizontal mirror images of one another and have shapes encompassing visual field defects. The shaped superior and inferior light stimuli stimulate pupillary responses whose amplitudes are measured. A cycle-averaged pupillary response balance and a luminance ratio are computed for each presentation of a stimulus pair. A stimulus pair response curve is computed by fitting cycle-averaged pupillary response balances to a sigmoid function of the luminance ratios. A balanced luminance ratio at which the cycle-averaged pupillary response balance is equal to about zero is computed from the sigmoid function. The balanced luminance ratio is indicative of the presence and location of retinal nerve damage.09-24-2009
20120236258ULTRASONIC SCANNING PROBE WITH A TUNING FORK-TYPE OSCILLATOR AND FEEDBACK CONTROL THEREOF - A mechanical scanning device is composed of an oscillating beam onto which a transducer is mounted, part of which is flexible such that the beam will oscillate at a frequency between 8 and 15 Hz when mechanically energized. To sustain oscillation, energy is supplied by means of two electromagnetic coils acting on two permanent magnets mounted on either side of the beam. In order to improve the linear performance of the probe, feedback control was employed. A position sensor along with supporting electronics was designed to provide control signal for the feedback system.09-20-2012
20120236257Vision Modification with reflected image - Various embodiments of methods and systems for improving and enhancing vision are disclosed. Adjustable lenses or optical systems may be used to provide adaptive vision modification. In some embodiments, vision modification may be responsive to the current state of the user's visual system. Certain embodiments provide correction of the subject's near and far vision. Other embodiments provide enhancement of vision beyond the physiological ranges of focal length or magnification.09-20-2012
20110279774SYSTEMS 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.11-17-2011
20120188507AUTOMATED VISION SCREENING APPARATUS AND METHOD - A system and method for screening vision including: requesting user information; performing objective visual acuity tests; and reporting visual acuity results without assistance from another person.07-26-2012
20110292336ANGLE INDICATOR FOR OCULAR MEASUREMENTS - Implantation of an accommodating intraocular lens in an eye may require the accurate measurement of the size, circumference, or diameter of the capsular bag of the eye. A flexible ring or ring portion may be temporarily or permanently inserted into the capsular bag for measuring the circumference of the capsular bag, for example, after extraction of a natural lens from the capsular bag. The ring or ring portion is generally compressible to fit through a surgical incision, then expands to fill the capsular bag along an equatorial region. The ring or ring portion includes a central component that changes shape and/or angle as the ring or ring portion is compressed. The shape change is generally correlated to the size of the capsular bag and may be visually measured through the cornea, the measurement being generally independent of corneal magnification. The measurement may be used to determine or calculate information about the capsular bag such as its size, elasticity, accommodative range, and so forth.12-01-2011
20130010257SYSTEM FOR IN VIVO ANALYSIS OF TEAR FILM IN THE HUMAN EYE VIA PHASE SHIFTING INTERFEROMETRY - An in vivo method of characterizing dynamic tear films has been developed using a near infrared phase-shifting interferometer. This interferometer continuously measures light reflected from the tear film, allowing precision analysis of the dynamic surface topography. Movies showing the tear film behavior may be generated along with quantitative metrics describing the tear film surface as it changes in time.01-10-2013
20100091241METHOD AND SYSTEM TO ASSESS OBJECTIVELY VISUAL CHARACTERISTICS - A method to assess objectively visual characteristics of one eye (04-15-2010
20120188505MODEL EYE PRODUCING A SPECKLE PATTERN HAVING A REDUCED BRIGHT-TO-DARK RATIO - A model eye includes an optically transmissive structure having a front curved surface to receive a coherent light beam, and an opposite rear planar surface for directing a portion of the coherent light beam back out the model eye through the front curved surface; and a material structure adhered to the rear planar surface of the optically transmissive structure that has a characteristic to cause a speckle pattern of the portion of the coherent light beam that is directed back out the front curved surface of the optically transmissive structure to have a bright-to-dark ratio of less than 2:1. In some embodiments, the material structure may include a fabric-reinforced polyethylene tape adhered to the rear planar surface of the optically transmissive structure by an adhesive. One example material structure which may be employed is duct tape.07-26-2012
20080246916Method and Apparatus for Determining the Visual Acuity of an Eye - The invention relates to a method for determining the visual acuity of an eye and a respective apparatus. The method comprises the steps of: providing the wavefront information of the eye, generating a point spread function based on the wavefront information of the eye, said point spread function representing a specific intensity distribution for a corresponding pupil size. After comparing the intensities of the point spread function with a selectable intensity level of intensity, those parts of the point spread function having an intensity being larger than the selectable intensity level are determined as a relevant part of the point spread function.10-09-2008
20100079725Lens Design Simplification Process - A method for producing lenses with at least one simple surface that is optically equivalent to a lens having two complex surfaces.04-01-2010
20110170059PHYSICAL MODEL EYE SYSTEMS AND METHODS - An optically realistic model eye is described. The optically realistic eye model has an optical axis and includes: an anterior replaceable module comprising a model cornea, model iris and model lens rotatably mounted for rotation about said axis, said module being representative of an emmetropic or pathological natural eye; an enclosure located posterior to said module and adapted to enclose a retinal area within which an image of an external object is brought to focus by said module; and a photoactive device movable within said enclosure and retinal area and adapted to detect or reflect a portion of the image for inspection, processing or analysis.07-14-2011
20080212024CUSTOMIZED CONTACT LENSES FOR REDUCING ABERRATIONS OF THE EYE - Higher order aberrations of an eye are reduced. Wavefront aberrations of the eye are measured, providing wavefront information and/or a wavefront map. A mask is derived from the wavefront information and/or wavefront map based on the measured wavefront aberrations. A customized contact lens is formed including the mask. The deriving of the mask includes optimizing a figure of merit using a PSF, a MTF, and/or another image quantifier.09-04-2008
20100103373Vision modification with reflected image - Various embodiments of methods and systems for improving and enhancing vision are disclosed. Adjustable lenses or optical systems may be used to provide adaptive vision modification. In some embodiments, vision modification may be responsive to the current state of the user's visual system. Certain embodiments provide correction of the subject's near and far vision. Other embodiments provide enhancement of vision beyond the physiological ranges of focal length or magnification.04-29-2010
20110267579INTEGRATED SURGICAL MICROSCOPE AND WAVEFRONT SENSOR - A wavefront sensor is integrated with a surgical microscope for allowing a doctor to make repeated wavefront measurements of a patient's eye while the patient remains on an operating table in the surgical position. The device includes a wavefront sensor optically aligned with a surgical microscope such that their fields of view at least partially overlap. The inclusion of lightweight, compact diffractive optical components in the wavefront sensor allows the integrated device to be supported on a balancing mechanism above a patient's head during a surgical procedure. As a result, the need to reposition the device and/or the patient between measuring optical properties of the eye and performing surgical procedures on the eye is eliminated. Many surgical procedures may be improved or enhanced using the integrated device, including but not limited to cataract surgery, Conductive Keratoplasty, Lasik surgery, and corneal corrective surgery.11-03-2011
20110205488METHOD, DEVICE AND ARRANGEMENT FOR MEASURING THE DYNAMIC BEHAVIOR OF AN OPTICAL SYSTEM - A method for measuring the dynamic behavior of an optical system is aimed at rendering the dynamic behavior of the optical system objectively detectable. To this end, the optical system to be measured is stimulated by stimuli whereby causing it to react, and the reaction is detected by means of a wave front analysis.08-25-2011
20090168017REFRACTIVE PRESCRIPTION USING OPTICAL COHERENCE TOMOGRAPHY - An optical coherence tomography apparatus and method for measuring refractive power of the human cornea is disclosed. The apparatus collects both the specularly reflected light from the anterior surface of the cornea and diffusely reflected light from the interior of the cornea. The combined refractive power of both surfaces of the cornea is determined.07-02-2009
20080273171METHODS AND DEVICES FOR MEASURING TEAR FILM AND DIAGNOSING TEAR DISORDERS - Methods and devices measure eye blinks and tear film lipid and aqueous layer thickness before and following ophthalmic formula application onto the ocular surface, especially wherein the ophthalmic formula is an artificial tear. The methods and devices are suitable for dry eye diagnosis. The methods and devices are suitable for use to evaluate ophthalmic formula effects on the tear film and to use such information to diagnose ophthalmic formula treatment of ocular disease conditions such as dry eye in the absence of contact lens wear or post-surgical eye drop treatment and diagnosis. The methods and devices are also suitable for use in the optimization of ophthalmic drug dosage forms and sustained drug release.11-06-2008
20080278683ADAPTIVE SEQUENTIAL WAVEFRONT SENSOR AND ITS APPLICATIONS - An adaptive sequential wavefront sensor comprises a sub-wavefront focusing lens, a sequential wavefront scanning device, a variable aperture, a position sensing device, and means for coordinating the operation of the wavefront scanning device, the variable aperture and the position sensing device. An adaptive sequential wavefront sensing method comprises the steps of sequentially projecting portions of a wavefront as image spots on a position sensing device, determining the deflection of each received image spot from a reference point on the position sensitive device, and coordinating the operation of a variable aperture with the operation the sequential projection and image position sensing. The adaptive sequential wavefront sensor has high speed, large dynamic range and variable spatial resolution, and hence can be used for real time measurement of the dynamics of eye accommodation. In addition, other functions or measurements can be combined with the adaptive sequential wavefront sensor to provide additional advantages. These additional function or measurement modules include a micro display based internal fixation and visual acuity projection module, a corneal topography module, and an optical coherence tomography module. When one or more of these modules is (are) combined with the adaptive sequential wavefront sensor, the combination system or apparatus can provide more accurate objective and subjective auto-refraction prescription, LASIK corneal ablation prescription, and contact lens or intra ocular lens prescriptions.11-13-2008
20080291395ACCOMMODATION COMPENSATION SYSTEMS AND METHODS - Methods and systems for obtaining an ocular aberration measurement of an eye of a patient are provided. Exemplary techniques involve obtaining a first induced metric for the eye that corresponds to a first accommodation state of the eye, obtaining a second induced metric for the eye that corresponds to a second accommodation state of the eye, and determining a natural metric of the eye based on the first and second induced metrics. An induced metric may include a pupil size or a spherical aberration. Techniques can also include determining a target metric for the eye base on the natural metric, determining whether an actual metric of the eye meets the target metric, obtaining an ocular aberration measurement of the eye if the actual metric meets the target metric, and determining a treatment for the eye based on the ocular aberration measurement.11-27-2008
20080309871RESIDUAL ACCOMMODATION THRESHOLD FOR CORRECTION OF PRESBYOPIA AND OTHER PRESBYOPIA CORRECTION USING PATIENT DATA - Methods, devices, and systems establish an optical surface shape that mitigates or treats presbyopia in a particular patient. The combination of distance vision and near vision in a patient can be improved, often based on input patient parameters such as pupil size, residual accommodation, and power need. Iterative optimization may generate a customized corrective optical shape for the patient. Threshold residual accommodation is established for presbyopia treatment.12-18-2008
20080212025OPTICAL OBSERVATION INSTRUMENT AND A METHOD OF CONTROLLABLY ADJUSTING A REFRACTIVE POWER IN SUCH INSTRUMENT - An optical observation instrument, in particular a spectacle, a reading aid or a telescope, comprises an optical element, in particular a spectacle lens, adapted to be controllably adjustable in its refractive power, a sensor, and a control unit for adjusting the refractive power as a function of signals from the sensor. The sensor is a brightness sensor. In a method of controllably adjusting a refractive power of an optical element in an optical observation instrument an optical parameter is captured by means of a sensor and the refractive power is adjusted as a function of a signal from the sensor. By means of the sensor the brightness of the light impinging on the optical instrument is captured.09-04-2008
20090161067Ophthalmic Instrument Alignment Apparatus and Method of Using Same - An ophthalmic instrument for use with a subject's eye, comprising an interferometer having a test arm in which the subject's eye is to be positioned and a reference arm, the reference arm including a mirror adapted to be positioned such that the reference arm has a predetermined length, and an ophthalmic apparatus coupled to the interferometer such that, by altering a test arm length, a length between the ophthalmic apparatus and the eye is also altered. The mirror is positioned to achieve the predetermined length and a length of the test arm is adjusted such that interference between the light reflected from the eye and the light reflected from the mirror is achieved, the ophthalmic apparatus is optically aligned with the eye.06-25-2009
20090251664SYSTEMS AND METHODS FOR DETERMINING INTRAOCULAR LENS POWER - A system for providing an intraocular lens includes a processor and a computer readable memory. The computer readable memory is configured to communicate with the processor, the memory having stored therein at least one of: one or more ocular dimensions, and at least one predetermined refractive outcome. The memory further includes a sequence of instructions which, when executed by the processor, cause the processor to select an intraocular lens, select a power of an intraocular lens, or provide an intraocular lens. The sequence of instructions includes determining one or more dimensions of an eye. The instructions also include calculating, based on a mathematical relationship, a distance from an apex of a cornea of the eye to an apex or plane of the intraocular lens after insertion into the eye. The instructions further calculating an optical power of the intraocular lens suitable for providing a predetermined refractive outcome. The mathematical relationship includes an axial length of the eye, an anterior chamber depth of the natural crystalline lens, and a corneal radius of the eye, but is independent of a thickness of the natural crystalline lens.10-08-2009
20090015787APPARATUS AND METHOD FOR DETERMINING AN EYEGLASS PRESCRIPTION FOR A VISION DEFECT OF AN EYE - The disclosure relates to a method for determining an eyeglass prescription for a vision defect of an eye. In certain embodiments, the method includes optimizing a caustic in the area of the retina of the eye for a light ray passing through the eyeglass prescription and the eye. The disclosure further relates to an apparatus that is suitable for carrying out the method.01-15-2009
20090086163COMPOUND MODULATION TRANSFER FUNCTION FOR LASER SURGERY AND OTHER OPTICAL APPLICATIONS - Methods, devices, and systems establish an optical surface shape that mitigates or treats a vision condition in a patient. An optical surface shape for a particular patient can be determined using a set of patient parameters for the specific patient by using a compound modulation transfer function (CMTF). The compound modulation transfer function can include a combination of modulation transfer functions (MTF's) at a plurality of distinct frequencies.04-02-2009
20110228218IMAGING SYSTEM - Imaging systems are provided allowing examination of different object regions spaced apart in a depth direction by visual microscopy and by optical coherence tomography. An axial field of view and a lateral resolution is varied depending on which object region is examined by the imaging system. The proposed imaging systems are in particular applicable for thorough examination of the human eye.09-22-2011
20110228219OPHTHALMIC SIMULATOR - A metamorphopsia simulator is capable of numerically simulating deformation of the retina of a metamorphopsia patient and irregularity in an arrangement of visual cells caused thereby. The metamorphopsia simulator of the present invention uses a method of digitizing a deformation amount of the retina according to an expression based on a probability density function, to find a movement amount of visual cells, and according to the movement amount of visual cells, find distortion of an image observed by the metamorphopsia patient.09-22-2011
20090021694Systems 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.01-22-2009
20090103047Tonometer Using Camera and Ambient Light - A tonometer uses ambient light available in an eye examining room, rather than a dedicated source of light, to examine a characteristic of an eye. A digital camera in the tonometer views an image of the eye as it is engaged by a contactor that applanates or indents the cornea. An electromagnetic mount for the contactor can supply a force pressing the contactor against the eye. While the examiner observes the resulting image a strain gauge can also measure the deformation pressure applied to the eye by the contactor. A microprocessor can then determine a characteristic of the eye from signals supplied by the camera and the strain gauge or the electromagnet force applier.04-23-2009
20090257023Method to Detect Transmissible Spongiform Encephalopathies Via Electroretinogram - Disclosed is a method for identifying transmissible spongiform encephalopathy in livestock via an electroretinogram, the method comprises producing a biphasic electroretinogram waveform having an a-wave and b-wave from livestock retina in response to photic stimulus, measuring the amplitude of the b-wave, wherein the amplitude is measured from the trough of the a-wave to the peak of the b-wave, measuring the implicit time of the b-wave, wherein the implicit time is measured from onset of photic stimulus to b-wave peak; and comparing said produced waveform to a comparative waveform of livestock known not to have transmissible spongiform encephalopathy, wherein the produced waveform having a decrease b-wave amplitude and increased b-wave implicit time being indicative of livestock having transmissible spongiform encephalopathy.10-15-2009
20100165289OPTICAL TOMOGRAPHIC IMAGING METHOD AND APPARATUS - An optical tomographic imaging method is provided in which light from a light source is split into a measuring beam and a reference beam, the measuring beam being moved by a scanning optical system and guided to an object to be examined, the reference beam being guided to a reference mirror, and in which a tomogram of the object is generated from a return beam of the measuring beam reflected or scattered by the object and the reference beam reflected by the reference mirror. The method includes acquiring longitudinal sectional information on the object, calculating depth-position information on the object from the longitudinal sectional information, and acquiring a three-dimensional surface image of the object by controlling a reference-path length defined by the reference mirror and a scanning operation of the scanning optical system in accordance with the depth-position information on the object.07-01-2010
20100165290USER-PROPOSED ENTRY FIELD(S) FOR CUSTOMIZED DATA ANALYSIS/PRESENTATION - One embodiment of the present invention is a method to not limit the device's manipulation of the data to that of the manufacturer, but to allow greater freedom for customization by the individual user for their preference.07-01-2010
20100014050APPARATUS AND METHOD OF DIAGNOSIS OF OPTICALLY IDENTIFIABLE OPHTHALMIC CONDITIONS - An apparatus that can measure images of at least a portion of an eye and record data sets indicative of a neurological condition. A method interrelates an image and a data set to provide an interpretive result. The apparatus and method thereby provide guidance as to the presence of a medical condition in a patient. The apparatus and method can be used in an iterative measurement process, in which the apparatus attempts to discern normal health from a state of health that is not normal health. If the interpretive result is consistent with normal health, the process terminates, information is recorded, and an optional report is given. If the interpretive result is not consistent with normal health, the apparatus and method attempts to distinguish which condition is consistent with the data and images used, and can iterate with additional measurements and information to attempt to provide a useful interpretive result.01-21-2010
20100231855Application of neuro-ocular wavefront data in vision correction - The present disclosure provides systems and methods for diagnosing and treating subjects using neuro-ocular wavefront data. As such, in some embodiments, among others, neuro-ocular wavefront data is obtained, and one or more characteristics of a visual system are ascertained from the neuro-ocular wavefront data.09-16-2010
20100208200INTRAOCULAR LENS ALIGNMENT USING CORNEAL CENTER - A method for generating a radial alignment guide for an eye includes collecting preoperative corneal topography data. The data includes a corneal vertex location and a pupil center location for an eye that is not dilated. The method then includes locating a dilated pupil center for the eye after the eye is dilated. The method further includes determining an adjusted offset between the corneal vertex and the dilated pupil center and displaying alignment data on an image of the eye based on the adjusted offset.08-19-2010
20100118265METHOD FOR DETERMINING CORRECTION CHARACTERISTICS FOR A VISION AID - A method for determining correction characteristics for a vision aid for at least one eye of a person wherein: a vision impression of the person is determined in a first usage condition after which a vision impression of the person is determined in a second usage condition after which the wavefront of the person is optimized by determining the correction characteristics for the vision aid until the vision impression of the person in the second usage condition at least approximately matches the vision impression of the person in the first usage condition.05-13-2010
20090073380ACCOMMODATION COMPENSATION SYSTEMS AND METHODS - Methods and systems for obtaining an ocular aberration measurement of an eye of a patient are provided. Exemplary techniques involve obtaining a first induced metric for the eye that corresponds to a first accommodation state of the eye, obtaining a second induced metric for the eye that corresponds to a second accommodation state of the eye, and determining a natural metric of the eye based on the first and second induced metrics. An induced metric may include a pupil size or a spherical aberration. Techniques can also include determining a target metric for the eye base on the natural metric, determining whether an actual metric of the eye meets the target metric, obtaining an ocular aberration measurement of the eye if the actual metric meets the target metric, and determining a treatment for the eye based on the ocular aberration measurement.03-19-2009
20130135581Integrated Refractor - The present invention contemplates a refraction system to integrate the objective and subjective measurement into a single instrument. The present invention also contemplates a refraction system with open-field and binocular viewing to overcome instrument myopia and to mimic viewing experience of a phoropter. The present invention further contemplates a refraction system employing a pair of optical trombones to eliminate the need of flipping plurality sets of trial lenses for defocus power correction.05-30-2013
20110001926Device and Method for Performing Measurements During a Surgical Intervention by Means of an Optical Coherence Tomography Device - A device for a therapeutic treatment of the eye by means of a laser is provided, which allows a real-time monitoring of the treatment. In particular, the laser light is supplied to the treatment region via a fibre. The monitoring of the treatment happens by means of optical coherence tomography (OCT). To this end the OCT measurement beam and the treatment laser light are coupled in a probe that is put onto the eye and allows to focus the OCT measurement beam on the tissue region inside of the eye that is treated at that moment.01-06-2011
20110128497COMPOUND MODULATION TRANSFER FUNCTION FOR LASER SURGERY AND OTHER OPTICAL APPLICATIONS - Methods, devices, and systems establish an optical surface shape that mitigates or treats a vision condition in a patient. An optical surface shape for a particular patient can be determined using a set of patient parameters for the specific patient by using a compound modulation transfer function (CMTF). The compound modulation transfer function can include a combination of modulation transfer functions (MTF's) at a plurality of distinct frequencies.06-02-2011
20110116039ACCOMMODATION COMPENSATION SYSTEMS AND METHODS - Methods and systems for obtaining an ocular aberration measurement of an eye of a patient are provided. Exemplary techniques involve obtaining a first induced metric for the eye that corresponds to a first accommodation state of the eye, obtaining a second induced metric for the eye that corresponds to a second accommodation state of the eye, and determining a natural metric of the eye based on the first and second induced metrics. An induced metric may include a pupil size or a spherical aberration. Techniques can also include determining a target metric for the eye base on the natural metric, determining whether an actual metric of the eye meets the target metric, obtaining an ocular aberration measurement of the eye if the actual metric meets the target metric, and determining a treatment for the eye based on the ocular aberration measurement.05-19-2011
20090033868Characterization of the Retinal Nerve Fiber Layer - Disclosed are method and apparatus for characterizing the retinal nerve fiber layer (RNFL). An advantageous diagnostic parameter for characterizing the RNFL is a function of the product of the local RNFL thickness at a measurement locus×the distance of the measurement locus from a base point. The value of the diagnostic parameter in a patient's retina is compared to a corresponding reference range acquired from a population of healthy retinas.02-05-2009
20090033869Ophthalmic ultrasonic measurement apparatus, and an ophthalmic measurement method - An ophthalmic ultrasonic measurement apparatus capable of narrowing differences in measurement results obtained by the apparatus which are made because of differences among examiners who operate the apparatus comprises an ultrasonic probe arranged to be brought into contact with a cornea of an examinee's eye, a calculation unit arranged to obtain a measured value of a length from the cornea to a given section inside the eye based on an echo from the eye by an ultrasonic wave which is emitted from the probe, and a memory arranged to store information on examiners and adjustment information for narrowing differences in measured values of the length which are made because of differences among the examiners while the adjustment information is associated with the examiners' information, wherein the calculation unit corrects the obtained measured value using the stored adjustment information.02-05-2009
20110242482System and Method for Determining and Predicting IOL Power in Situ - The present invention relates to a system and a method for determining the power of an artificial intraocular lens (IOL) in situ. The invention furthermore relates to a system and a method for predicting the optical outcome of IOL surgery. Use of the system may provide prevention, treatment, or amelioration of diseases and disorders affecting the lens of the eye and which may benefit from IOL surgery. Moreover, the invention relates to a computer-readable medium for implementing such a system on a computer.10-06-2011
20090219483Front-lens attachment for an optical observation device - The present invention, among other things, relates to a front-lens attachment (09-03-2009
20100039614SYSTEM AND METHOD FOR PRESCRIPTION OF VISUAL AIDS - In one aspect, the invention features a method for determining an eyeglass prescription for an eye. The method includes obtaining a measurement of a wavefront indicative of the refractive properties of the eye, establishing an optimization space corresponding to a plurality of possible prescriptions for the eye, determining a value for a merit function for each of the possible prescriptions in the optimization space, where the merit function value corresponds to a visual function of the eye when corrected using the corresponding possible prescription, generating a representation of the merit function values, and outputting the representation to an eye care professional.02-18-2010
20090033867WAVEFRONT REFRACTIONS AND HIGH ORDER ABERRATION CORRECTION WHEN WAVEFRONT MAPS INVOLVE GEOMETRICAL TRANSFORMATIONS - Wavefront measurements of eyes are typically taken when the pupil is in a first configuration in an evaluation context. The results can be represented by a set of basis function coefficients. Prescriptive treatments are often applied in a treatment context, which is different from the evaluation context. Hence, the patient pupil can be in a different, second configuration, during treatment. Systems and methods are provided for determining a transformed set of basis function coefficients, based on a difference between the first and second configurations, which can be used to establish the vision treatment.02-05-2009
20100053552CUSTOM PHASE PLATE - A custom phase plate for a light beam of wavelength “λ” includes a sheet of plastic material having a base refractive index “n03-04-2010
20110149241ZONE EXTENSION SYSTEMS AND METHODS - Wavefront measurements of eyes are often taken when the pupil is in a first configuration in an evaluation context. The results can be represented by a set of basis function coefficients. Prescriptive treatments are often applied in a treatment context, which is different from the evaluation context. Hence, the patient pupil can be in a different, second configuration, during treatment. Systems and methods are provided for determining a transformed set of basis function coefficients, based on a difference between the first and second configurations, which can be used to establish the vision treatment.06-23-2011
20110249236SCHEMATIC EYE AND ADJUSTMENT METHOD AND EVALUATION METHOD FOR OPTICAL COHERENCE TOMOGRAPHY APPARATUS - A schematic eye used for the evaluation of the optical system of an optical coherence tomography apparatus which captures a tomogram of the fundus includes the first optical member which irradiated light from the optical system strikes and the second optical member which irradiated light from the first optical member strikes. A plurality of layers having different scattering intensities in the incident direction of irradiated light are formed on the second optical member.10-13-2011
20120120367WAVEFRONT PROPAGATION FROM ONE PLANE TO ANOTHER - The present invention provides methods, systems and software for scaling optical aberration measurements of optical systems. In one embodiment, the present invention provides a method of reconstructing optical tissues of an eye. The method comprises transmitting an image through the optical tissues of the eye. Aberration data from the transmitted image is measured across the optical tissues of the eye at a first plane. A conversion algorithm is applied to the data, converting it to corrective optical power data that can be used as a basis for constructing a treatment for the eye at a second plane.05-17-2012
20110149240ASSESSMENT OF TOPOGRAPHIC SEMI-MERIDIAN PARAMETERS FOR CORNEAL ASTIGMATISM ANALYSIS AND VECTOR PLANNING TREATMENT - Techniques are disclosed in which a topographic parameter is determined in each semi-meridian of the eye by considering the topography in each of three concentric zones from the central axis at 3 mm, 5 mm, and 7 mm and assigning weighting factors for each zone, By selectively treating the weighted values in the three zones, parameters of magnitude and meridian can be obtained for each semi-meridian. From these parameters, a single topographic value for the entire eye (CorT) can be found as well as a value representing topographic disparity (TD) between the two semi-meridians. The topography values for the semi-meridians are used in a vector planning system to obtain treatment parameters in a single step operation.06-23-2011
20090185132SYSTEMS AND METHODS OF PHASE DIVERSITY WAVEFRONT SENSING - A phase diversity wavefront sensor includes an optical system including at least one optical element for receiving a light beam; a diffractive optical element having a diffractive pattern defining a filter function, the diffractive optical element being arranged to produce, in conjunction with the optical system, images from the light beam associated with at least two diffraction orders; and a detector for detecting the images and outputting image data corresponding to the detected images. In one embodiment, the optical system, diffractive optical element, and detector are arranged to provide telecentric, pupil plane images of the light beam. A processor receives the image data from the detector, and executes a Gerchberg-Saxton phase retrieval algorithm to measure the wavefront of the light beam.07-23-2009
20080278684Ophthalmological Measuring System and Method for Determining the Biometric Data of an Eye - An opthalmological measuring system for obtaining biometric data of an eye. with a view to the pre-operative determination of a replacement lens or supplementary lens or refractive operations. The invention includes a combination of a measuring instrument based on ultrasound, an optical measuring instrument, and an evaluation unit, measuring values of the optical measuring instrument and/or of the measuring instrument based on ultrasound being used by the evaluation unit for determining the biometric data of an eye. Furthermore, keratometric and/or pachymetric measurements can also be carried out. The combination of different measuring systems enables a complete examination or diagnosis of a patient on a measuring table, so that the patient does not need to be moved, or have to come back at a later date for more measurements.11-13-2008
20080252848TRANSFORMATION METHODS OF WAVEFRONT MAPS FROM ONE VERTEX DISTANCE TO ANOTHER - The present invention provides methods, systems and software for scaling optical aberration measurements of optical systems. In one embodiment, the present invention provides a method of reconstructing optical tissues of an eye. The method comprises transmitting an image through the optical tissues of the eye. Aberration data from the transmitted image is measured across the optical tissues of the eye at a first plane. A conversion algorithm is applied to the data, converting it to corrective optical power data that can be used as a basis for constructing a treatment for the eye at a second plane.10-16-2008
20100277689Reflectometry/Interferometry system and method for corneal plane positioning - A system for positioning an eye of a patient, for example, for laser ophthalmic surgery includes a reflectometer adapted to receive as input a reflected beam from an anterior surface of a cornea of an eye of a patient. The interferometer is calibratable to a desired position of the corneal anterior surface. A comparator is in signal communication with the interferometer and is adapted to calculate from the input a difference between an actual position and the desired position of the corneal anterior surface. A device is in signal communication with the comparator for moving the patient a distance in a direction for matching the actual position to the desired position of the corneal anterior surface.11-04-2010
20110261319DEVICE AND METHOD FOR CALIBRATING RETINOSCOPES - A device for calibrating retinoscopes for diverging and/or converging streak and spot retinoscopy and a method for calibrating retinoscopes to produce a given convergence or divergence of light emitted from the retinoscope from a fixed retinoscopic working distance to produce a predetermined pupillary reflex endpoint at neutralization of a refractive error, thereby resulting in a more accurate corrective eye prescriptions and evaluation of the visual system.10-27-2011
20110134390EYE MODEL FOR USE IN OPTHALMOLOGICAL MEASUREMENTS - An artificial eye model for use in ophthalmological measurements exhibits a simulation of at least one eye structure, for instance of a cornea or of a crystalline lens. In accordance with the invention the simulation possesses fluorescent properties. In this way, a beam expansion as a result of multiple scattering in the case of scattered-light-based photographic recordings can be avoided. Instead of this, a sharp-contour imaging of the simulated eye structures is made possible.06-09-2011
20110134391WAVEFRONT PROPAGATION FROM ONE PLANE TO ANOTHER - The present invention provides methods, systems and software for scaling optical aberration measurements of optical systems. In one embodiment, the present invention provides a method of reconstructing optical tissues of an eye. The method comprises transmitting an image through the optical tissues of the eye. Aberration data from the transmitted image is measured across the optical tissues of the eye at a first plane. A conversion algorithm is applied to the data, converting it to corrective optical power data that can be used as a basis for constructing a treatment for the eye at a second plane.06-09-2011
20110255053SYSTEM AND METHOD FOR ANALYZING WAVEFRONT ABERRATIONS - A method of creating a statistical model for use in predicting vision correction prescriptions for patients is disclosed. The method comprises obtaining a plurality of wavefront aberration measurements from a plurality of patient's eyes, obtaining a plurality of visual acuity measurements from the plurality of patients, applying values associated with the plurality of wavefront measurements to an input layer of a statistical model, applying values associated with the plurality of visual acuity measurements to an output layer of the statistical model, and generating a plurality of weight values associated with respective nodes of the statistical model based on the applied values associated with the plurality of wavefront measurements and corresponding values associated with the plurality of visual acuity measurements.10-20-2011
20110199576METHODS AND DEVICES FOR MEASURING TEAR FILM AND DIAGNOSING TEAR DISORDERS - Methods and devices measure eye blinks and tear film lipid and aqueous layer thickness before and following ophthalmic formula application onto the ocular surface, especially wherein the ophthalmic formula is an artificial tear. The methods and devices are suitable for dry eye diagnosis. The methods and devices are suitable for use to evaluate ophthalmic formula effects on the tear film and to use such information to diagnose ophthalmic formula treatment of ocular disease conditions such as dry eye in the absence of contact lens wear or post-surgical eye drop treatment and diagnosis. The methods and devices are also suitable for use in the optimization of ophthalmic drug dosage forms and sustained drug release.08-18-2011
20110149239OPTICAL DIAGNOSIS USING MEASUREMENT SEQUENCE - Devices, systems, and methods that facilitate optical analysis, particularly for the diagnosis and treatment of refractive errors of the eye. An optical diagnostic method for an eye includes obtaining a sequence of aberration measurements of the eye, identifying an outlier aberration measurement of the sequence of aberration measurements, and excluding the outlier aberration measurement from the sequence of aberration measurements to produce a qualified sequence of aberration measurements. The sequence of aberrations measurements can be obtained by using a wavefront sensor. An optical correction for the eye can be formulated in response to the qualified sequence of aberration measurements.06-23-2011
20100026955OPHTHALMIC LENS DISPENSING METHOD AND SYSTEM02-04-2010
20110051083NO-HISTORY METHOD FOR INTRAOCULAR LENS POWER ADJUSTMENT AFTER EXCIMER LASER REFRACTIVE SURGERY - Systems and methods for using a new corneal ratio, referred to as the Geggel ratio, to estimate how much treatment a patient received at an original myopic or mixed astigmatism excimer laser refractive surgery. The Geggel ratio represents the ratio of the measure of a pre-IOL central pachymetry to a measure of a pre-IOL superior pachymetry. The estimated laser ablation depth (ELAD) is used in a derived linear regression equation to determine an IOL power adjustment that is added to the standard SRK/T formula used to determine IOL power.03-03-2011
20090201465METHODS AND DEVICES FOR MEASURING TEAR FILM AND DIAGNOSING TEAR DISORDERS - Methods and devices measure eye blinks and tear film lipid and aqueous layer thickness before and following ophthalmic formula application onto the ocular surface, especially wherein the ophthalmic formula is an artificial tear. The methods and devices are suitable for dry eye diagnosis. The methods and devices are suitable for use to evaluate ophthalmic formula effects on the tear film and to use such information to diagnose ophthalmic formula treatment of ocular disease conditions such as dry eye in the absence of contact lens wear or post-surgical eye drop treatment and diagnosis. The methods and devices are also suitable for use in the optimization of ophthalmic drug dosage forms and sustained drug release.08-13-2009
20080218693CORRECTION OF PRESBYOPIA USING ADAPTIVE OPTICS 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.09-11-2008
20120044454CUSTOMIZED INTRAOCULAR LENS POWER CALCULATION SYSTEM AND METHOD - Selecting an optimal intraocular lens (IOL) from a plurality of IOLs for implanting in a subject eye, including measuring anterior corneal topography (ACT), axial length (AXL), and anterior chamber depth (ACD) of a subject eye; selecting a default equivalent refractive index depending on preoperative patient's stage or calculating a personalized value or introducing a complete topographic representation if posterior corneal data are available; creating a customized model of the subject eye with each of a plurality of identified intraocular lenses (IOL) implanted, performing a ray tracing through that model eye; calculating from the ray tracing a RpMTF or RMTF value; and selecting the IOL corresponding to the highest RpMTF or RMTF value for implanting in the subject eye.02-23-2012
20100182566Method and arrangement for determining the individually required addition of a vision aid - The invention is directed to a method for determining the individually required addition (Add) of a vision assist for an eye, the method having the following steps: 07-22-2010
20120057125Adaptive optics ocular fundus observation device - An adaptive optics ocular fundus observation device that utilizes adaptive optics in observing ocular fundus, which is characterized by further comprising a judging means for judging whether an arrangement of the retinal locations devoid of nerve cells reflects a retinal nerve fiber tract.03-08-2012
20120026460COMPOUND MODULATION TRANSFER FUNCTION FOR LASER SURGERY AND OTHER OPTICAL APPLICATIONS - Methods, devices, and systems establish an optical surface shape that mitigates or treats a vision condition in a patient. An optical surface shape for a particular patient can be determined using a set of patient parameters for the specific patient by using a compound modulation transfer function (CMTF). The compound modulation transfer function can include a combination of modulation transfer functions (MTF's) at a plurality of distinct frequencies.02-02-2012
20130010258IMAGING APPARATUS AND IMAGING METHOD - An imaging apparatus includes an irradiation unit configured to irradiate an object to be examined with a plurality of measuring beams, a scanning unit configured to perform scanning with the plurality of measuring beams, a specifying unit configured to specify a size of an overlap region where scanning regions of the plurality of measuring beams on the object to be examined overlap one another, and a change unit configured to change one of a center-to-center distance of the scanning regions and a size of each of the scanning regions according to the size of the overlap region.01-10-2013
20120154746FUNDUS IMAGING METHOD, FUNDUS IMAGING APPARATUS, AND STORAGE MEDIUM - A fundus imaging apparatus includes an aberration measurement unit adapted to measure an aberration of reflected light obtained by irradiating an object to be examined with measurement light; an aberration correction unit adapted to correct an aberration of light in accordance with the measured aberration; a control unit adapted to repeatedly control processing of the aberration measurement unit and the aberration correction unit; and a changing unit adapted to change a first function of a predetermined order representing the aberration to a second function including an order higher than the predetermined order in accordance with at least one of a measurement result obtained by the aberration measurement unit and a control result obtained by the control unit. The aberration correction unit corrects an aberration expressed by the second function.06-21-2012
20100290004Characterization of Retinal Parameters by Circular Profile Analysis - Certain diseases of the retina are diagnosed by circular profile analysis of retinal parameters, such as thickness. Retinal thickness around a user-defined circle on the retina is measured by three-dimensional optical coherence tomography or other ophthalmological techniques. Abnormally thin regions are identified by comparing a measured function of thickness vs. polar angle to a reference function of thickness vs. polar angle. A degree of abnormality is characterized by the ratio of the integral of the measured thickness function to the integral of the reference thickness function over the abnormally thin region, as specified by a range of polar angles.11-18-2010
20110181836PHANTOM FOR RENDERING BIOLOGICAL TISSUE REGIONS - Models of anatomical parts and methods utilizing and fabricating such anatomical models are provided. The model can include an assembly of one or more optically transmissive media having a first portion and a second portion. The one or more optically transmissive media can be configured to provide similar optical properties as that between two regions of the anatomical part. For example, in an example eye model, the two regions can be a corneal surface and/or retina regions of an eye. A rendered retina can be formed in the second portion of the assembly and can be representative of the retina of the eye. The rendered retina can have one or more features associated with the retina of the eye.07-28-2011
20120218514MEDICAL DEVICE - The present invention relates to a device comprising a shaft having at least a first portion and a second portion that can adopt a closed position in which the first and second portions are positioned adjacent each other and an open position in which the first and second portions are positioned distant from each other, one or both of the first and second portions housing or forming part of one or more of an ophthalmoscope, an otoscope, a tendon hammer, a tuning fork and a red hat pin. Also provided are improved otoscope heads and means to protect the functional heads of medical tools when not in use.08-30-2012
20120188506OPTIMIZING VISION CORRECTION PROCEDURES - In one embodiment a wavefront sensor is configured to measure real time aberration values of a wavefront returned from the eye of a patient while an image of the eye of the patient is being viewed by a surgeon during an on-going vision correction procedure and for providing an output signal indicating real time aberration values and a display, coupled to the wavefront sensor, is configured to show a dynamic display indicating the real time aberration values to the surgeon and configured to be viewed by the surgeon while also viewing the image of the eye of the patient during the on-going vision correction procedure.07-26-2012
20120081663Simulator for use in ophthalmological measurements - A simulator to be used in ophthalmological measurements includes a display apparatus and a control device. The control device is adapted to control the display apparatus in such a manner that the display apparatus displays an image that is adapted to simulate the arrangement of a pupillary midpoint relative to a reference structure.04-05-2012
20110222020Methods, Systems and Computer Program Products for Distributed Scanning for Motion Artifact Reduction in Optical Coherence Tomography - Methods of reducing motion artifacts in Optical Coherence Tomography (OCT) include scanning a sample with a scan pattern to acquire OCT data at a plurality of data locations. The data locations are distributed in the scan pattern across the sample such that at least some spatially adjacent data locations are acquired non-sequentially in time. A profile of the sample corresponding to a sample surface or an aspect of an internal structure of the sample is estimated responsive the OCT data.09-15-2011
20130021574INTEGRATED SURGICAL MICROSCOPE AND WAVEFRONT SENSOR - A wavefront sensor is integrated with a surgical microscope for allowing a doctor to make repeated wavefront measurements of a patient's eye while the patient remains on an operating table in the surgical position. The device includes a wavefront sensor optically aligned with a surgical microscope such that their fields of view at least partially overlap. The inclusion of lightweight, compact diffractive optical components in the wavefront sensor allows the integrated device to be supported on a balancing mechanism above a patient's head during a surgical procedure. As a result, the need to reposition the device and/or the patient between measuring optical properties of the eye and performing surgical procedures on the eye is eliminated. Many surgical procedures may be improved or enhanced using the integrated device, including but not limited to cataract surgery, Conductive Keratoplasty, Lasik surgery, and corneal corrective surgery.01-24-2013
20080225226Scanning laser ophthalmoscope - A scanning laser ophthalmoscope comprises: a laser source that emits a laser beam; an irradiation optical system that scans the laser beam over a fundus two-dimensionally; a photoreceptor optical system that receives reflection from the fundus by using a photoreceptor element; an image processor that obtains an image of the fundus based on an output signal from the photoreceptor element; a monitor; and a controller that causes the monitor to display the obtained fundus image, wherein the image processor comprises a subtractive processing circuit that performs time-subtractive processing on the output signal from the photoreceptor element in a state where the output signal is input as an analog signal, and forms the fundus image based on the signal subjected to the subtractive processing.09-18-2008
20080218692Reflectometry/Interferometry System and Method for Corneal Plane Positioning - A system for positioning an eye of a patient, for example, for laser ophthalmic surgery includes a reflectometer adapted to receive as input a reflected beam from an anterior surface of a cornea of an eye of a patient. The interferometer is calibratable to a desired position of the corneal anterior surface. A comparator is in signal communication with the interferometer and is adapted to calculate from the input a difference between an actual position and the desired position of the corneal anterior surface. A device is in signal communication with the comparator for moving the patient a distance in a direction for matching the actual position to the desired position of the corneal anterior surface.09-11-2008
20080218691Short-Coherence Interferometeric Measurement of Length on the Eye - Two problems arise when measuring length at the eye by short-coherence interferometry. First, the measurement focus and coherence window usually do not coincide. Second, the scanning process along the eye axis is time-consuming. Both result in poor signal quality and inaccurate measurements. The present application is directed to a short-coherence interferometer in which a right-angle mirror and focusing optics jointly carry out a periodic back-and-forth movement in such a way that the measurement beam focus which is generated by the focusing optics and imaged on the eye by relay optics is moved synchronously with the coherence window from the cornea along the optic axis of the eye to the fovea centralis. Further, different path lengths are generated in the measurement beam path and reference beam path by means of a plurality of reflectors, so that the scanning process is limited to distances which are smaller than the optical length of the eye. The present invention is advantageously implemented using on a fiber-optic interferometer. According to the invention, the reference interferometer arm and measurement interferometer arm are combined with the arms of a fiber-optic interferometer.09-11-2008
20100085537LENSLET ARRAY FOR RETINAL OXIMETRY - The multi-aperture system of the present invention provides a retinal oximetry apparatus for determining the level of oxygen saturation in retinal vessels using a lenslet array comprising at least seven lenses for the simultaneous measurement of reflected light with at least three wavelengths and at least four polarization states. The multi-aperture system of the present invention further provides an apparatus for determining the level of oxygen saturation in retinal vessels using a lenslet array comprising at least ten lenses for the simultaneous measurement of reflected light with at least three wavelengths for oxygen measurement, at least three wavelengths for melanin content, and at least four polarization states. Methods of operating the same are also provided.04-08-2010
20130201448ABERRATION CORRECTION METHOD AND ABERRATION CORRECTION APPARATUS - To increase the speed of aberration correction, provided is an aberration correction method, including: a step of selecting a first polarized component of reflected light obtained by irradiating an object to be inspected with measuring light; a step of measuring an aberration of the first polarized component; a step of correcting the aberration of the first polarized component by controlling a first aberration correction unit in accordance with a measured value of the aberration of the first polarized component; and a step of correcting, in a case where a value of the aberration corrected in the first aberration correcting step is smaller than a predetermined value, an aberration of a second polarized component of the reflected light, which is different from the first polarized component, by controlling a second aberration correction unit based on a control for the first aberration correction unit in the case.08-08-2013
20130100403Determining physical lengths in an eye using multiple refractive indices - In certain embodiments, determining physical lengths of an eye includes determining an optical length of each segment of a plurality of segments of an axis of the eye, where each segment corresponds to a portion of the eye. A refractive index is determined for each segment. A physical length of each segment is determined according to the optical length and the refractive index of the segment.04-25-2013
20130169930Optical device with active user-based aberration correction - Exemplary embodiments enable an enhanced direct-viewing optical device to make customized adjustments that accommodate optical aberrations of a current user. In some instances a real-time adjustment of the transformable optical elements is based on known corrective optical parameters associated with a current user. In some implementations a control module may process currently updated wavefront measurements as a basis for determining appropriate real-time adjustment of the transformable optical elements to produce a specified change in optical wavefront at an exit pupil of the direct-viewing device. Possible transformable optical elements include refractive and/or reflective and/or diffractive and/or transmissive characteristics that are adjusted based on current performance viewing factors for a given field of view of the direct-viewing device. Dynamic repositioning and/or transformation of corrective optical elements may be based on a detected shift of a tracked gaze direction of a current user of the direct-viewing device.07-04-2013
20080198329Ophtalmologic surgical microscope having a measuring unit - A surgical microscope (08-21-2008
20120274896SYSTEMS, METHODS AND COMPUTER-READABLE MEDIUM FOR DETERMINING DEPTH-RESOLVED PHYSICAL AND/OR OPTICAL PROPERTIES OF SCATTERING MEDIA BY ANALYZING MEASURED DATA OVER A RANGE OF DEPTHS - In depth-resolved imaging of scattering media, incident light interacts with tissue in a complex way before the signal reaches the detector: Light interacts with media between the light source and a specific depth, then scatters at that depth and the backscattered light again interacts with media on its way to the detector. The resulting depth-resolved signal therefore likely does not directly represent a physical or optical property of the media at those depths. Exemplary systems, methods and computer-accessible medium can determine physical or optical properties based on such depth-resolved signals. For example, almost all the light can interact with the media, and that the energy of the incident light at a certain depth is likely therefore related to the integral of the scattered light from all deeper locations. Based on the detected signals, the properties of the media can be estimated in an iterative way.11-01-2012
20120069297EYEGLASS PRESCRIPTION METHOD - In general, in some embodiments, the disclosure provides a method that includes making a subjective refraction of a person to determine information about the person's vision, making a wavefront measurement of one or both of the person's eyes to determine information about the optical properties of one or both of the person's eyes (e.g., aberrations), calculating a prescription for the person based on the information about the person's vision and the information about the optical properties of one or both of the person's eyes, and outputting the prescription.03-22-2012

Patent applications in class Objective type

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