449results about "Refractometers" patented technology

The invention discloses a diopter detection data fusion processing system based on deep learning, and relates to the technical field of medical detection. The system comprises a multi-modal data acquisition module, a data preprocessing and aligning module, a dynamic sequence analysis module, a deep learning regression core module, a personalized calibration module and a result output and visualization module which are connected in sequence. The system obtains objective detection data through a multi-modal data acquisition module, and multi-modal data is formed after preprocessing and space-time alignment; the dynamic sequence analysis module extracts adjustment response time sequence features; the deep learning regression core module calculates an initial diopter parameter; the personalized calibration module performs parameter optimization in combination with the biological characteristics of the user; and finally, a visual quality simulation result is generated through a result output and visualization module. According to the method, the multi-modal data fusion and deep learning technology is utilized, rapid and accurate diopter automatic detection is realized, and the detection efficiency and the individuation level are remarkably improved.

The invention discloses a personalized myopia prevention and control single-spectrum irradiation optimization system, and the key points of the technical scheme are that the system comprises the following steps: 1, collecting basic data: collecting the individual basic data of a user, and enabling the individual basic data to reflect the inherent features of the eyes of the user and the basic state of myopia; step 2, collecting real-time associated data: collecting the real-time associated data of the user, wherein the real-time associated data reflects the myopia progress dynamic state of the user and a daily eye use scene; step 3, initial single-spectrum irradiation parameter generation: initial single-spectrum irradiation parameters adapted to the user are generated based on individual basic data and real-time associated data, and the initial single-spectrum irradiation parameters comprise irradiation wavelength, irradiation intensity, single irradiation duration and irradiation time period; 4, collecting eye safety data: executing single-spectrum irradiation according to the initial single-spectrum irradiation parameters, and collecting the eye safety data of the user in real time; the prevention and control effectiveness can be improved, and the individual difference problem is solved.

The invention relates to the technical field of optometry, and discloses a self-service optometry method and system for a self-service optometry unit, and the method comprises the steps: obtaining a facial image of a user, carrying out key point detection, recognizing images of two eyes, and determining the center of a pupil; setting the position of a light spot emission point according to the pupil center; when the light spot image is emitted into the pupil of the user, adjusting the brightness of the light spot image according to a preset brightness step length, obtaining the pupil area of the user corresponding to each brightness, determining the pupil area change rate corresponding to each brightness, determining the optimal brightness according to the pupil area change rate, and emitting the light spot image to the user based on the optimal brightness; the method comprises the following steps: acquiring a reflected light spot image in a pupil of a user, performing feature extraction on the reflected light spot image to obtain light spot feature information, comparing the light spot feature information with preset standard light spot feature information, determining a refraction state of the user according to a comparison result, and generating an optometry result. According to the invention, the initial accuracy of optometry is improved.

Certain aspects of the present disclosure provide a system for processing image data from an intraoperative diagnostic device in real-time during an ophthalmic procedure. The system comprises an image capture element that captures a grayscale image of a first size and an image processing element that scales the grayscale image from the first size to a second size. The system also comprises a two-stage classification model comprising: a feature extraction stage to process the scaled grayscale image and generate a feature vector based on the scaled grayscale image and a classification stage to process the feature vector and generate an output vector. The image processing element is further configured to determine an image quality of the obtained grayscale image based on the output vector for display to an operator and the image quality of the obtained grayscale image indicates a probability that the obtained grayscale image includes an artifact.

Systems and methods are provided for improving overall vision in patients suffering from a loss of vision in a portion of the retina (e.g., loss of central vision) by providing symmetric or asymmetric optic with aspheric surface which redirects and / or focuses light incident on the eye at oblique angles onto a peripheral retinal location. The intraocular lens can include a redirection element (e.g., a prism, a diffractive element, or an optical component with a decentered GRIN profile) configured to direct incident light along a deflected optical axis and to focus an image at a location on the peripheral retina. Optical properties of the intraocular lens can be configured to improve or reduce peripheral errors at the location on the peripheral retina. One or more surfaces of the intraocular lens can be a toric surface, a higher order aspheric surface, an aspheric Zernike surface or a Biconic Zernike surface to reduce optical errors in an image produced at a peripheral retinal location by light incident at oblique angles.

The invention belongs to the field of visual training, and particularly relates to a multispectral dynamic visual function training system and method. The multispectral dynamic visual function training system comprises an image acquisition module, an intelligent analysis module, a control module, a training execution module and a multispectral light source module, the image acquisition module is arranged at a position corresponding to an eye and is used for acquiring image information near eyeballs of a user, personal information of the user and a vision diagnosis result in real time, and the image information comprises eyeball movement tracks, pupil sizes and forms, cornea edge contours and eye white elastic states; and the intelligent analysis module combines the image information and the acquisition time of the image information. According to the scheme, through collection, analysis, regulation and control of a closed loop, the problems that in the prior art, a real-time analysis mechanism based on eyeball images is lacked, the adaptability of a training scheme and eye dynamic characteristics is weak, and precise regulation and control of functions such as light nutrition supplement and choroid stimulation cannot be achieved are solved; and precise training is also realized, and the effects of prevention and protection, cooperative improvement, compliance improvement and the like are achieved.

The invention discloses a multifunctional automatic comprehensive optometry combined operation table and a use method thereof. The operating platform comprises a mechanical main body structure, a posture sensing system and a central processing and control unit. The mechanical main body structure comprises an optometry chair driven by a rotating disc, a lifting mechanism and an electric rotating shaft, and the posture sensing system is composed of a sitting and leaning posture recognition mechanism used for recognizing body postures and a head posture recognition mechanism used for capturing head movement. The central processing and control unit judges the posture of the optometry person according to the sensing data, and if the posture does not meet the preset standard, the seat height, the backrest angle and the horizontal position are adjusted through voice prompt and an automatic driving mechanism; when the posture reaches the standard, the optometry equipment is automatically controlled to complete operation, automatic and accurate correction of the posture before optometry and intelligentization of the optometry process are achieved, and the accuracy and efficiency of optometry results are effectively improved.

An apparatus, and corresponding method, for determining a refractive property of an eye includes a housing with a port configured to receive an eye and also light from the eye. A tunable lens can be mounted to the housing to apply a variable focal power to the light from the eye and to pass the light along an optical path toward a wavefront sensor within the housing. The wavefront sensor can receive the light via the optical path and measure a wavefront thereof. A determination module can be configured to determine a property of the eye based on the wavefront. Embodiments can be handheld, portable, and open view, while providing objective wavefront aberrometry, subjective phoroptry, and accommodation and presbyoptic evaluation, as well as lensometry functions.

To provide a new technology to measure at least characteristics of both eyes with a high degree of precision while saving costs and space.SOLUTION: An ophthalmologic apparatus includes an objective lens, an OCT optical system, an optical axis switch member, a control part, and an intraocular parameter calculation part. The OCT optical system projects measurement light onto a left eye to be examined arranged on a first measurement optical axis or onto a right eye to be examined arranged on a second measurement optical axis through the objective lens, and detects interference light between return light of the measurement light from the left eye to be examined or the right eye to be examined and reference light through a reference light passage. The optical axis switch member switches an optical axis of the OCT optical system so as to roughly match the first measurement optical axis or the second measurement optical axis. The control part controls the optical axis switch member. The intraocular parameter calculation part calculates the intraocular parameter of the left eye to be examined or the right eye to be examined on the basis of a result of the detection of interference light obtained in a state where the optical axis of the OCT optical system is switched so as to roughly match either the first measurement optical axis or the second measurement optical axis.SELECTED DRAWING: Figure 1

The invention relates to a refractive error detection system and method. The refractive error detection system comprises a plurality of lens assemblies and a mobile terminal device. Wherein the multiple groups of lens assemblies are arranged on the front surface or the rear surface of the mobile terminal equipment and are in communication connection with the mobile terminal equipment; wherein each group of lens assemblies comprises a flash lamp, a first camera and a second camera which are arranged along the astigmatism meridian corresponding to each group of lens assemblies, and the lens assemblies are used for collecting eye images; and the mobile terminal equipment is used for inputting the eye image into the completely trained refractive error detection model and acquiring a refractive error detection result output by the refractive error detection model. Through the method and the device, the problems of relatively high detection cost and relatively low detection efficiency of the refractive error in related technologies are solved, and the technical effects of reducing the detection cost of the refractive error and improving the detection efficiency of the refractive error are achieved.

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. ‎

A method for estimating refraction of an eye of an individual, including: a) providing a set of N acquired eccentric photorefraction images of the eye, b) setting values for a set of parameters including at least sphere, c) providing a set of N simulated eccentric photorefraction images, d) determining an estimator of a difference between the set of N acquired eccentric photorefraction images and the set of N simulated eccentric photorefraction images, e) performing an optimization using an optimization algorithm so as to optimize the estimator by adjusting values for the set of parameters and iterating steps c) and d), and f) deducing an estimation of at least one refraction parameter of the eye.

The application discloses a campus vision screening data visualization and regional prevention and control strategy generation system, comprising: a data acquisition unit for acquiring campus student vision screening core data, eye environment data, individual behavior data and regional public health resource data; a data preprocessing unit in communication connection with the data acquisition unit, for cleaning, fusing and feature extraction of the collected multi-source heterogeneous data. The application overcomes the technical problems of existing campus vision screening system, such as data isolation, single visualization form, extensive prevention and control strategy, unbalanced regional resource allocation, insufficient privacy protection and lack of iterative optimization mechanism, and provides an intelligent system integrating data acquisition, preprocessing, spatio-temporal visualization, risk assessment, hierarchical strategy generation, interactive output, privacy protection and iterative optimization, so as to realize data management, visualization, analysis, strategy generation and efficiency evaluation, and improve the accuracy of campus myopia prevention and control and the efficiency of regional management.

Generation of treatment recommendations for topographic-based excimer laser surgical procedures is described that includes generating accurate cylinder compensation and spherical compensation values that are adjusted to compensate for unique characteristics of advanced topographic-based excimer laser surgical systems. Generating treatment recommendations generally includes determining a topographic vector from a topographic corneal map of the eye, determining a posterior astigmatism vector and an anterior astigmatism vector for the eye, and generating an interior astigmatism vector using the topographic vector, the posterior astigmatism vector, the anterior astigmatism vector, and a manifest astigmatism vector. In various embodiments, the cylinder compensation is generated using the interior astigmatism vector and the posterior astigmatism vector, and the spherical compensation is generated using an initial spherical compensation modified by a topographic addback modifier and a cylinder addback modifier.

The invention relates to the field of intelligent medical treatment, in particular to a dynamic illumination prediction method and device based on a refraction state and a program product. Comprising the steps of obtaining eye refraction data of a to-be-tested person; carrying out clustering and feature fusion on the refractive data to obtain fusion features; outputting the fusion features to a trained prediction model for prediction to obtain a brightness prediction value and a color temperature prediction value; and the prediction model carries out weight parameter initialization by compressing an abnormal value of refractive data and compensating distribution deviation of refractive clustering. According to the method, personalized expression of different myopia degrees on illumination perception differences can be achieved, brightness and color temperature parameters are dynamically predicted, actual lighting equipment is driven, dynamic balance of visual comfort and environmental adaptability is achieved, and the method has good actual application value.

The invention discloses an astigmatism coaxial decomposition method, system and device for analyzing the astigmatism correction effect of a corneal refractive surgery, and relates to the technical field of corneal refractive surgeries, and the method comprises the steps: obtaining a preoperative subjective optometry result and a postoperative subjective optometry result of a to-be-evaluated user; based on the preoperative subjective optometry result and the postoperative subjective optometry result, the actual correction refractive power decomposed in the axial direction of the expected correction lenticular lens is determined; based on the preoperative subjective optometry result and the postoperative subjective optometry result, the maximum actual correction refractive power decomposed in the direction perpendicular to the axial direction of the expected correction lenticular lens is determined; the surgical actual corrective diopter of the user is determined based on the actual corrective power decomposed in the axial direction of the lenticular and the maximum actual corrective power decomposed perpendicular to the axial direction of the lenticular. According to the astigmatism description method provided by the invention, the efficiency, practicability and comprehensiveness of astigmatism correction effect analysis are improved.

The present application belongs to the technical field of computer optometry instrument, and particularly relates to a computer optometry instrument human eye automatic tracking system; the computer optometry instrument human eye automatic tracking system comprises a control console, an arc-shaped track, a base, a moving table, a main body, a support frame and a rotary tracking unit are arranged on the control console; the rotary tracking unit is used to control the main body to automatically track the head movement when the head of a person to be detected rotates left and right, so that the detection device is directed to the pupil position, and the adjustment of the staff is further matched, so that the work load of the staff is reduced, and the detection result accuracy is improved; the present application does not fix the head of the person to be detected, thereby reducing the nervousness of the person to be detected; especially for children who are timid, if the head is fixed, the nervousness of the children will be further increased, and even crying will be caused, so that the detection process cannot be carried out.

A vision screening device displays visual stimuli and captures image(s) of the eye while the visual stimuli is changing over a period of time. The vision screening device uses the images to determine and monitor refractive error, ambient light level(s), pupil size, and gaze angle as the visual stimuli changes over the time period. Based on the refractive error, a determination of hyperopia and / or presbyopia is made. Based on the gaze angle and / or the pupil size, a confidence metric is determined. Based on the confidence metric and / or the determination, a recommendation for the patient is generated and displayed.

The present invention provides a method for determining the refractive power of an eye, comprising successively irradiating the eye with a plurality of laser beams of different expansions, wherein the laser beams are emitted by at least one laser feedback interferometer (LFI), wherein the plurality of laser beams are irradiated onto the eye in such a way that a portion of each laser beam is reflected back from the eye into the LFI and interferes with the laser beam in the LFI, successively detecting a portion of each of the plurality of laser beams of different expansions with a photodetector, wherein the photodetector outputs intensity signals corresponding to the detected portions of the laser beams of different expansions, and determining the refractive power of the eye based on the detected intensity signals of the differently expanded laser beams.The invention also provides a corresponding sensor device with an adjustable lens and an alternative method with a plurality of LFIs, as well as VR glasses and electronic glasses.

A system may include a headset device comprising a display screen and an adaptive map perimetry algorithm that is configured to access or implement a normative database or model. The system may implement a VF test adapted to fit an area of the display screen based on values in the normative database or model and is rendered as a same or similar visualization compared to one or more different headset devices having different display screens having different respective shapes, formats, sizes, and / or resolutions. The system may receive visual test data indicating a visual field of the user and detect one or more initial test locations. The one or more initial test locations define one or more healthy clusters indicative of an absence of scatoma and one or more damaged clusters indicative of scotoma. The system may generate a spatial mapping identifying locations of the one or more damaged clusters.

A model eye for examining the resolution of a fundus examining device is disclosed. The model eye (10) comprises: one or more lenses (100, 200) corresponding to a cornea and / or a crystalline lens of an eye; and a chart unit (300) located at an inner rear surface of the model eye (10) corresponding to a fundus of an eye, and including two or more chart plates (310, 320, 330) each having one or more resolution test chart (410, 420, 430) for examining resolution of a fundus examining device, wherein the chart plates (310, 320, 330) are arranged at different positions so that the resolution test charts (410, 420, 430) are located at the focal distances of the measurement lights of the fundus examining device which incident to a central region and peripheral region of the inner rear surface of the model eye (10) through the lenses (100, 200).

The invention discloses a diopter prediction system and equipment for adjusting static diopter, relates to the technical field of diopter prediction, and aims to solve the problem of low accuracy of predicting and adjusting static diopter in the prior art. The device comprises a refraction detection light path unit used for processing a first reflection light beam to obtain refraction detection data; the corneal curvature detection light path unit is used for processing the second reflected light beam to obtain corneal curvature detection data; the eye axis length detection light path unit is used for processing the third reflected light beams with different phases to obtain eye axis length detection data; the vision detection unit is used for processing according to the fed-back sighting mark detection signal to obtain vision detection data; the data summarization unit is used for summarizing the data to obtain eye vision light summarized data and acquiring basic information of the current subject; and the diopter prediction unit is used for inputting the data of the data summarization unit into a diopter prediction model constructed based on a preset prediction factor so as to determine the predicted diopter of the current adjustment static state.

The utility model relates to a liquid lens zoom foggy vision system, training instrument and optometry unit, foggy vision system is equipped with eyepiece lens cone, front lens cone, rear lens cone and objective lens cone in proper order along the optical path, the front lens cone is equipped with first lens and second lens in proper order, the rear lens cone is equipped with liquid lens and third lens in proper order, and the objective lens cone is equipped with second lens and third lens in proper order. The front lens barrel and the rear lens barrel form a variable-focus liquid lens telescopic system; a foggy view image display panel is arranged in the objective lens barrel and used for playing foggy view animations. The system further comprises a controller, and the liquid lens, the objective lens cone and the fog view image display panel are electrically connected with the controller. According to the fogging system, the zoom lens can be controlled to zoom through a circuit, video animation is played in combination with the fogging image display panel, switching of different images is achieved, the zoom response is fast, a complex structure and switching images are not needed, the structure is simple and small, the attention of trainees is better attracted, and the fogging effect is improved.

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.

To provide an ophthalmologic device capable of changing an examination distance and a target presentation condition as desired, and improving measurement efficiency by quickly and easily executing measurement of eye characteristics on an eye to be examined under various examination distances and presentation conditions.SOLUTION: An ophthalmologic device includes a target projection system (32) for presenting a target to an eye (E) to be examined with a predetermined examination distance and a presentation condition according to the examination distance, and a control part (26) for controlling the target projection system (32). The control part (26) controls the target projection system (32) so as to present the target with a first examination distance for a far distance examination of the eye (E) to be examined, a second examination distance for a near distance examination, and at least one third examination distance different from the first examination distance and the second examination distance.SELECTED DRAWING: Figure 5

Computer-implemented method for estimating a future change in an axial length and / or a refractive error of an eye. The method includes receiving a dataset relating to an individual patient comprising

The application discloses a diopter-adjustable and real-time retina imaging detection simulation eye, comprising: an emulated cornea, an emulated lens and an adjustable vitreous structure arranged in sequence along an optical axis; the adjustable vitreous structure comprises: a vitreous cavity filled with an emulated vitreous, a curved retina arranged at the end of the vitreous cavity, and a micrometer adjustment system for driving the curved retina to move forward and backward along the optical axis; the foveal region of the curved retina is integrated with an attenuation module and an imaging module, which are used for collecting a light spot image on the foveal region in real time; the simulation eye further comprises an analysis module electrically connected with the imaging module, and the analysis module is configured to process the collected light spot image to extract optical parameters on the curved retina.

The present application relates to the field of ophthalmic apparatus, especially to an eye optometry instrument for visual screening. The eye optometry instrument for visual screening comprises a measuring instrument body, a chin rest, a forehead rest, an adjusting frame, a driving assembly, a cleaning roller and a cleaning barrel, one side of the measuring instrument body is provided with a display for displaying measurement data, the other side of the measuring instrument body is symmetrically provided with a chin rest for supporting the chin of a subject, and the upper side of the chin rest is provided with a forehead rest for abutting against the forehead of the subject. The eye optometry instrument for visual screening provided by the present application realizes instant cleaning of the chin rest and the forehead rest after use through the design of the cleaning roller and the cleaning barrel, and manual cleaning of the chin rest and the forehead rest by the staff is not needed, so that the physical strength and time cost of the staff are greatly reduced, the fatigue of the staff caused by frequent operation is avoided, the work efficiency is improved, the hidden danger of health and safety in the scene of continuous screening by multiple people is solved, and the burden of the staff is reduced.

An ophthalmologic apparatus includes a visual-target presenting portion (41) that is configured to present visual targets (8) to left and right subject eyes (EL, ER), respectively; and an objective measurement optical system (6, 7) that is configured to objectively measure eye characteristics of the left and right subject eyes (EL, ER), respectively. The visual-target presenting portion (41) is configured to present the visual targets (8) while changing a convergence position (R, R1, R2), where two lines of sight (SL1, SR1, SL2, SR2) from positions of the left and right subject eyes (EL, ER) intersect, with pinhole plates (50) respectively disposed at positions conjugate with pupils of the left and right subject eyes (EL, ER). The objective measurement optical system (6, 7) is configured to obtain the objective refractive values of the left and right subject eyes (EL, ER), respectively, under a condition where the pinhole plates (50) are respectively disposed by the visual-target presenting portion (41) and the visual targets (8) presented at the convergence position (R, R1, R2) are binocularly fused.