268results about "Gonioscopes" patented technology

An OCT instrument comprising: an optical coupler which generates signal light and reference light from a swept narrowband light source; a detector which samples a time-varying interference signal based on the reference light and signal light returned from a sample; an adjustable optical frequency shifter which: generates a first sideband light by adjusting an optical frequency of the reference light, such that the detector unit samples a first time-varying interference signal resulting from an interference between the sideband light and the returned signal light; and maintains the optical frequency of the reference light such that the detector unit samples a second time-varying interference signal resulting from an interference between the reference light and the returned signal light. The OCT instrument generates a respective axial depth profile of the sample based on each of the sampled first time-varying interference signal and the sampled second time-varying interference signal.

In accordance with one aspect of the present invention, an optical coherence tomography-based ophthalmic testing center system includes an optical coherence tomography instrument comprising an eyepiece for receiving at least one eye of a user or subject; a light source that outputs light that is directed through the eyepiece into the user's or subject's eye, an interferometer configured to produce optical interference using light reflected from the user's / subject's eye, an optical detector disposed so as to detect said optical interference; and a processing unit coupled to the detector. The ophthalmic testing center system can be configured to perform a multitude of self-administered functional and / or structural ophthalmic tests and output the test data.

The invention discloses a dioptric scleroderma cataract dynamic intraocular pressure stable control ultrasonic emulsification system adaptive to a dual-channel operation, which comprises a host control unit, an ultrasonic emulsification handle, a perfusion and suction system, an intraocular pressure monitoring unit, a pressure balance module and a scleroderma fragmentation module, through cooperation of the intraocular pressure control module and the two-way operation type adaptive control module, a high-precision filling valve and a closed-loop suction pump are synchronously adjusted in real time according to anterior chamber built-in and external monitoring fusion data, and intraoperative intraocular pressure fluctuation is controlled within + / -2 mmHg; through pulse modulation and a self-adaptive negative pressure curve of the hardcore fragmentation enhancement module, the stability of the anterior chamber is ensured while the hardcore fragmentation efficiency is improved; fluid dynamics and energy parameters can be automatically optimized according to conventional incisions or micro incisions; according to the system, the anterior chamber stability problem in the high-difficulty cataract surgery is solved.

Systems and methods for intraocular lens (IOL) selection using emmetropia zone prediction include determining pre-operative measurements of an eye, estimating a post-operative anterior chamber depth (ACD) of an intraocular lens based on the pre-operative measurements, estimating a post-operative manifest refraction in spherical equivalent (MRSE) of the eye with the IOL implanted based on the pre-operative measurements and the estimated post-operative ACD, determining whether the eye with the IOL implanted is likely to be in an emmetropia zone based on the estimated post-operative MRSE, re-estimating the post-operative MRSE of the eye with the IOL implanted using an emmetropia zone prediction model or a non-emmetropia zone prediction model based on the emmetropia zone determining, and providing the re-estimated post-operative MRSE to a user to aid in selection of an IOL for implantation in the eye.

Low-cost, portable in-vivo confocal ophthalmoscopes (PICOs) and associated methods are described that are capable of producing microscopic images of the anterior segment of the eye and the external eye structures enabling visualization of cellular and some sub-cellular structures. Some of the features of the described ophthalmoscopes include the use of a non-contact objective lens in conjunction with a grating-based, scan-less confocal microscopy approach, integration of the capability of imaging the external eye and anterior segment en face, integration of a display as part of the microscope, increased signal level and imaging speed, reduction of detected specular reflection, and attachment methods onto a slit lamp biomicroscope or for hand-held use.

A system for treating a media opacity in a vitreous media of an eye includes a visualization module adapted to provide visualization data of a portion of the eye via one or more viewing beams. The system includes a laser module adapted to selectively generate a treatment beam directed towards the media opacity in order to disrupt the media opacity. The laser module and the visualization module have a shared aperture for guiding the treatment beam and the one or more viewing beams towards the eye, the shared aperture being centered about a central axis. A controller is configured to acquire one or more defining parameters of the media opacity and determine when the media opacity is with a predefined target zone of a real-time viewing window. The media opacity is treated with the treatment beam when the media opacity is within the predefined target zone.

The invention discloses a continuous optical zoom slit-lamp microscope system and an inspection method and application thereof, and belongs to the technical field of ophthalmology medical equipment. The system is composed of a continuous zooming module, a light source module, a data processing module, a 3D imaging module and an AI identification module. The inspection method comprises the steps of equipment initialization and head position fixation of an inspected person, AI low-magnification (5 *) preliminary screening, adaptive lens high-magnification (40 *) fine observation, dynamic light source adjustment, three-dimensional data acquisition and cloud intelligent diagnosis. The method is applied to examination and intelligent diagnosis of eye diseases such as cataract. The problems that a traditional slit-lamp microscope is discontinuous in zooming, inconvenient to operate, lack of intelligent diagnosis and free of 3D stereoscopic display are solved, and the objective of the invention is to realize simple and convenient equipment operation, continuous examination process, intelligent diagnosis and stereoscopic display, facilitate collective teaching, significantly improve the diagnosis efficiency and accuracy of eye diseases such as cataract and the like, and improve the diagnosis efficiency and accuracy of eye diseases such as cataract and the like. And DICOM standard data cloud sharing and remote consultation are supported.

A tomographic imaging system, methods to visualize tomographic images, and a ‎stereoscopic calibration procedure for obtaining two-dimensional cross-sectional ‎and three-dimensional volumetric images over the entire anterior eye. The optical ‎system combines stereoscopic imaging with patterned illumination (e.g., slit-‎scanning or array of slits). The captured cross-sectional images can be viewed ‎individually or as a fly-through video. The calibration and reconstruction methods ‎determine the true spatial location of imaged features and record a 3D volumetric ‎representation of the anterior eye. The system can image the entire anterior ‎chamber and contiguous structures, including the corneal limbus, sclera and ‎eyelids. Furthermore, the system can obtain corneal topography. ‎

The apparatus (100) for a medical procedure includes a gonioscope (118) having a distal surface (120) for placement adjacent to a patient's eye (142), a proximal surface (121) opposite the distal surface, and multiple facets (119) between the distal and proximal surfaces. The apparatus also includes a camera (112) for capturing an image of the anterior chamber (129), a laser (108) for generating a beam, a scanner (110) for directing the beam through the proximal surface of the gonioscope, and optics for focusing the beam to strike tissue at a cone angle of 2° or less. A controller (132) processes the image of the anterior chamber to identify a region (308) of the trabecular meshwork (150) within the eye and controls the scanner to direct the beam to strike the region at multiple locations.

A method for assessing a lens capsule stability condition in an eye of a human patient includes simultaneously directing electromagnetic energy in a predetermined spectrum via an energy source onto a pupil of the eye after movement of the eye results in eye saccades occurring therein. The method further includes acquiring images of the eye indicative of the eye saccades using an image capture device and calculating a motion profile of the lens capsule using the images via an ECU. Additionally, the method includes extracting time-normalized lens capsule oscillation trajectories based on the motion profile via the ECU and then model fitting the lens capsule oscillation trajectories via the ECU, thereby assessing the lens capsule instability condition. Also disclosed herein is an automated system for performing an embodiment of the method, the automated system including an energy source, an image capture device, and an ECU.

A non-sliding, non-sutured hands-free contact lens assembly for ophthalmic procedures utilizes a number of micro structures strategically placed on the bottom of either the contact lens or the bottom of a contact lens holder ring. After the contact lens, or the contact lens assembled with the contact lens holder ring, is placed on the cornea of the eye and centered, a surgeon applies downward pressure either on the contact lens itself or on the lens holder ring. This secures the lens assembly to the cornea due to increased friction between the micro structures and the tissues of the eye when the micro structures penetrate through the tear film and, optionally, viscous solution film and into the contact with superficial layer of cornea or other parts of the eye, thus temporarily anchoring the contact lens, or lens holder, to the desired surgical site.

This flow velocity measurement method comprises: a heating step (S102) for heating a part of a medium; a first optical measurement step (S101) for acquiring a first image of observation illumination light that has passed through the medium, at a first timing; a second optical measurement step (S103) for acquiring a second image of observation illumination light that has passed through the medium, at a second timing which is after the first timing and which is during or after execution of the heating step; a first refractive index distribution change calculation step (S104) for calculating first information pertaining to a change in refractive index distribution based on the heat distribution of the medium on the basis of the first image and the second image; and a flow velocity calculation step (S105) for calculating the flow velocity of the medium on the basis of the first information pertaining to the change in the refractive index distribution.

The present invention relates to a method and a device for estimating a full shape of a lens of an eye from measurements of the lens taken in-vivo by optical imaging techniques, the measurements comprising visible portions of the lens, the method comprises defining non-visible portions of the lens parting from the in-vivo measurements and using a geometrical model of a lens previously built from ex-vivo measurements. The full shape parameters of the crystalline lens can be estimated in the present invention from optical imaging techniques to improve the estimation of the IOL position and thus the IOL power selection.

Certain embodiments disclose a contact lens holder including a rim forming a lens receptacle for receiving a lens and a flange integrally formed with and extending from the rim, flange comprising at least one tab, wherein at least one of a posterior surface of the flange and a posterior surface of the at least one tab comprises micro-structuring.

An optical measurement system and apparatus for carrying out cataract diagnostics in an eye of a patient includes a Corneal Topography Subsystem, a wavefront aberrometer subsystem, and an eye structure imaging subsystem, wherein the subsystems have a shared optical axis, and each subsystem is operatively coupled to the others via a controller. The eye structure imaging subsystem is preferably a fourierdomain optical coherence tomographer, and more preferably, a swept source OCT.

Methods and systems for measuring the optical quality of an eye based on laser ray tracing are provided herein. Generally, the method uses the steps of temporally detecting the human eye with one or more laser beams in a set of points within the pupil of the eye, detecting projections of the laser beams reflected and scattered from the retina, and processing an image of the detected laser spots. In one embodiment, the components of the system include, but are not limited to, a laser having a dual-axis acousto-optic deflector and a dual-output generator of a digitally synthesized sinusoidal voltage, a collimating optical system, a conjugate telescope system, a polarizing beam splitter, and first and second photosensitive detectors, each component being in operable communication with a processing unit. Another embodiment uses a multi-laser block that does not require laser beam scanning.

A method for collecting biometric measurement data of an eye on the basis of different measurement modalities, allowing for physiologically correct, representative, and robust biometric measurement data. In the method, the measurement data for individual measurement variables and the dynamic behavior of the eye are recorded continuously at the highest possible repetition rate over the measurement time. The individual phases of the dynamics of the eye which define the limits of the phase for stable vision are analyzed on the basis of the measurement values, and only the measurement data for the individual measurement variables are output which have been detected during the phase for stable vision. Although the proposed method is provided for collecting biometric measurement data in preparation for a cataract operation, the method can also be applied to other areas of ophthalmology to generate error-free measurement data or recordings of the eye.

Provided herein are a method and device for laser ray tracing measurement of intraocular distances and structures. Generally, the device has a laser, pairs of acousto-optical deflectors, drivers, frequency generators, and beam splitters, a telescope and collimating lens, a basic optometric channel and a processing unit arranged and configured to probe an eye with modulated laser beams oriented to cross along optically determinable paths. Analysis of the detectable backscattered radiation is used to confirm the position of a beam cross-point and to calculate the distance thereof to an apex of the cornea. Data obtained from repeated probing is used to reconstruct the intraocular structure of the eye.

A system arranged to process an anterior-segment optical coherence tomography, AS-OCT, image comprising representations of portions of a scleral spur of an eye to obtain a geometric measurement of the eye, comprising data processing hardware arranged to: process the AS-OCT image to acquire respective locations in the AS-OCT image of the representations of the portions of the scleral spur of the eye in the AS-OCT image; and obtain the geometric measurement based on the acquired locations. The system further comprises an OCT imaging system which is operable to acquire the AS-OCT image and comprises a fixation target to fix a gaze direction of the eye during acquisition of the AS-OCT image such that an axis in the AS-OCT image corresponding to a pupillary axis of the eye is aligned with a direction in the AS-OCT image corresponding to an axial imaging direction of the OCT imaging system.

A method of treating an eye includes delivering an OCT beam along an OCT optical path that enters a first optical subsystem along an input axis, and exits the first optical subsystem along an output axis that: 1) is substantially parallel to the optical axis of the eye, 2) is radially offset from the optical axis, and 3) extends through the cornea and into a portion of the irido-corneal angle at a point along a circumferential angle of the eye. The method also includes imaging the portion of the irido-corneal angle with the OCT beam; delivering a laser beam along an angled optical path that extends through the first optical subsystem, through the cornea, through the anterior chamber, and into a target volume of ocular tissue in the portion of the irido-corneal angle; and photodisrupting at least a portion of the target volume of ocular tissue with the laser beam.

The present invention provides a goniolens and gonioscopy tool that can be freely moved on the cornea, thereby allowing for easy adjustment of the viewing angle and direction. [Solution] The goniolens 1 comprises a convex aspherical portion 2 that partially contacts the cornea 11, and a convex spherical portion 3 provided on the opposite side of the aspherical portion 2 for observing the iridocorneal angle 12 through the aspherical portion 2. The iridocorneal angle observation device 6 comprises the goniolens 1 and a holder 5 that holds the goniolens 1.

An ophthalmic apparatus includes an image acquisition unit (159) configured to acquire an anterior segment image (E') of a subject eye (E), an optotype projection system (140) configured to present an optotype to the subject eye (E) in at least two presentation positions different from each other, and a line-of-sight direction detection unit (26) configured to extract a feature point from the anterior segment image (E') that has been acquired by the image acquisition unit (159) when the optotype has been presented in each of the at least two presentation positions, detect positional information on the anterior segment image (E') of the feature point that has been extracted, and detect a line-of-sight direction of the subject eye (E) on a basis of the positional information.

There is provided a method for determining type of cataract by an electronic device. The method includes performing vision focus calibration for a user, determining central and peripheral regions of interest on a display of the electronic device based on fixated vision, performing a primary test for obtaining scores for the central and peripheral regions of interest, selecting at least one vision test mode based on the obtained score, and adapting at least one visual display parameter based on the obtained score and the selected at least one vision test mode. The method also includes determining a type of cataract from the selected at least one vision test mode, determining severity of the determined type of cataract, and providing the determined type of cataract and the determined severity with one or more recommendations to the user.

This application provides a hyperspectral imaging device for the anterior segment of the anterior segment, comprising: an illumination optical path including a light source; an imaging optical path; a first beam splitter for splitting the light emitted from the imaging optical path into reflected light and transmitted light; an image acquisition optical path for receiving reflected light and converting the reflected light's optical signal into an electrical signal; a hyperspectral data acquisition optical path for receiving transmitted light; a scanning mirror with an adjustable angle; and a controller configured to adjust the deflection angle of the scanning mirror based on the position of the anterior segment region to be detected contained in the image, so that the light reflected from the anterior segment region to be detected can be projected into the hyperspectral data acquisition optical path along its optical axis. The device provided by this application offers doctors more reference information for disease classification and diagnosis, significantly reduces the impact of eye tremors on spectral data, and improves accuracy.

An ophthalmic apparatus comprises a visible light illumination channel, which illuminates a retina of an eye of a patient under examination by visible light. A near-infrared illumination channel illuminates the retina of the eye of the patient under examination by near-infrared light. An imaging channel receives light from the retina of the eye illuminated by the visible light and / or the near-infrared light. A target channel outputs fixation image content to a patient whose eye is under the examination for fixation of a gaze direction of the patient. An alignment arrangement illuminates the anterior part of the eye and reflections therefrom are received by two of a fundus camera sensor and a first and second pupil camera sensors. A data processing unit determines an optimal positional alignment of the eye for imaging a fundus of the eye by a fundus camera sensor based on still image and / or video capture of the anterior part of the eye.

To provide an inexpensive ophthalmologic apparatus capable of diagnosing an angle or an anterior chamber depth of a subject eye.SOLUTION: An ophthalmologic apparatus of the present disclosure includes: imaging means that images a subject eye; drive means that performs drive of changing a position of the imaging means such that a distance between the imaging means and the subject eye is a predetermined distance by using a fundus image captured by the imaging means; and estimation means that estimates information regarding an angle of the subject eye by using an anterior eye image captured by the imaging means in the predetermined distance.SELECTED DRAWING: Figure 6

[Problem] To provide a technology with which it becomes more likely to be able to select a posterior chamber phakic intraocular lens having a size suitable for a subject's eye. [Solution] Provided is a simulation system comprising: an acquisition unit that acquires a non-insertion image, which is an image, captured by a tomographic device, of an anterior ocular segment of a subject's eye into which a posterior chamber phakic intraocular lens has not been inserted; a generation unit that generates, on the basis of the non-insertion image and the size of a posterior chamber phakic intraocular lens to be inserted into the subject's eye, an insertion image, which is an image of the anterior ocular segment of the subject's eye into which the posterior chamber phakic intraocular lens has been inserted; an identification unit that identifies, on the basis of the insertion image, an optimal size, which is the optimal size of the posterior chamber phakic intraocular lens to be inserted into the subject's eye; and an output unit that outputs information relating to the optimal size.

A personal eyewear device comprises: a frame for supporting one or more lenses in front of a left eye and a right eye of a wearer when the personal eyewear device is worn by the wearer and an electronics module. The electronics module includes: a processor, a memory, a power source for powering the electronics module, and an eye tracking subsystem, wherein the processor and the memory are communicatively coupled with the eye tracking subsystem and wherein the eye tracking subsystem comprises: a first pair of imaging sensors forming a first stereo imaging sensor configured to capture images of a left eye of the wearer; and a second pair of imaging sensors forming a second stereo imaging sensor configured to capture images of a right eye of the wearer. The device further includes at least one additional sensor subsystem and a scheduling module.

The invention belongs to the technical field of cataract crystal evaluation, and particularly relates to a cataract crystal turbidity degree quantitative evaluation method based on optical coherence tomography. OCT original data are calibrated through standard scatterer signals, the influence of equipment parameters and individual differences is eliminated, the objective comparability of physical quantities such as attenuation coefficients is ensured, and the accuracy of evaluation of the turbidity degree of a cataract crystal is improved. Subregions are accurately divided according to a crystal anatomical structure, attenuation coefficients of depth resolution and spatial texture features are synchronously extracted, limitation of single features is broken through, sensitive analysis of local opacity is realized, finally, multi-region and multi-dimensional parameters are automatically integrated by using a pre-trained feature fusion model, continuous comprehensive opacity quantitative indexes are generated, and the opacity analysis accuracy is improved. Dependence on artificial experience is completely avoided, and the sensitivity and repeatability of evaluation are remarkably improved; finally, closed-loop evaluation of calibration, regionalized decoding and intelligent quantization is formed.

The present disclosure provides an ophthalmic viewing system for visualizing structures on and in an eye of a medical patient. Certain embodiments provide an ophthalmic viewing system comprising: an ophthalmic microscope; an anterior chamber gonoscopy device configured to relay an image of an inner periphery of the patient's eye to an ophthalmic microscope; and a robotic arm configured to hold the anterior chamber gonoscopy device in position relative to the ophthalmic microscope and the patient's eye to relay an image of the inner perimeter of the patient's eye to the ophthalmic microscope for observation by the user.