383results about "Phoropters" patented technology

The invention relates to the technical field of medical rehabilitation, and discloses a vestibular function and cognitive function rehabilitation training system and method based on virtual reality, and the rehabilitation training system comprises a hardware platform, a software platform and a server. The hardware platform comprises VR interaction equipment, a head motion tracking sensor and calculation and display equipment; the software platform is integrated with a user management module, a visual stimulation module, a vestibular rehabilitation training module, a cognitive evaluation and training module, a dynamic visual acuity evaluation module and a data management and analysis module. By combining black and white chess grid visual stimulation, standardized vestibular rehabilitation tasks, spatial cognitive testing and DVA objective monitoring, synchronous evaluation and personalized collaborative intervention of vestibular functions and cognitive functions of dizzy patients are realized. According to the method, the problems of boring traditional rehabilitation means, subjective evaluation and lack of quantitative feedback are solved, and the scientificity, interestingness and curative effect testability of rehabilitation training are remarkably improved.

The invention belongs to the technical field of visual training, and particularly relates to a multi-dimensional visual training feedback method for improving binocular fusion visual and stereoscopic visual functions, and the method comprises the following steps: carrying out medical baseline detection, generating an initial ability portrait through visual function evaluation and cognitive ability testing, matching training difficulty parameters, and generating a personalized scheme; multi-modal game training is carried out, training types comprise gamification training, animation scene training and offline family task training, and the training difficulty is dynamically adjusted; a tutor performs remote one-to-one guidance, and dynamically adjusts a training scheme according to a change report by tracking the training progress in real time; and the system performs multi-dimensional effect evaluation and self-optimizes a difficulty prediction algorithm. According to the method, the problems of dull training and passive participation, scheme stiffness and execution deviation, single stimulation and cognitive load, scene limitation and continuous interruption are solved.

Configurations are disclosed for a health system to be used in various healthcare applications, e.g., for patient diagnostics, monitoring, and / or therapy. The health system may comprise a light generation module to transmit light or an image to a user, one or more sensors to detect a physiological parameter of the user's body, including their eyes, and processing circuitry to analyze an input received in response to the presented images to determine one or more health conditions or defects.

A method for obtaining an optical prescription. The method includes determining a value of a fatigue parameter for at least two intermediate optical prescriptions among a plurality of intermediate optical prescriptions, the fatigue parameter associated with a visual fatigue level of a subject carrying out a visual task involving any kind of visual content, wherein each determined value of the fatigue parameter is associated with a respective one of the plurality of intermediate optical prescriptions; comparing the determined values of the fatigue parameter; and obtaining the optical prescription, based on the comparison of the determined values of the fatigue parameter. A system for obtaining an optical prescription is also disclosed.

This application is directed to media content compensation at an electronic device having a head-mounted display. The electronic device determines a multifocal eyewear prescription of a user associated with the electronic device. The multifocal eyewear prescription includes a multifocal parameter for a lens having a plurality of focal lengths. The electronic device obtains input media content, converts the input media content to corrective media content based on the multifocal eyewear prescription of the user, and renders, on the HMD, the corrective media content. In some embodiments, the lens includes a plurality of segments corresponding to the plurality of focal lengths. Each image frame of the input media content is divided into a plurality of regions based on the plurality of segments. The electronic device compensates the plurality of regions of the input media content based on the plurality of focal lengths to generate the corrective media content.

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.

Brain activity can be monitored to facilitate a vision test in a virtual reality (VR) environment using an electronic device that includes a head-mounted display (HMD) and a plurality of electrodes. The electronic device can execute a user application configured to enable a virtual vision test, and generates a VR user interface corresponding to a three-dimensional (3D) virtual environment. The electronic device renders, on the HMD, a user interface including a first visual stimulus corresponding to the virtual vision test. While displaying the visual stimulus, in real time, the electronic device collects a plurality of electrical signals by the plurality of electrodes that contact a head of a user, and determines information of at least one of a second visual stimulus following the first visual stimulus and a user response to the first visual stimulus based on the plurality of electrical signals.

A patient's contact lens fitting profile can be performed using an electronic device in a virtual environment. The electronic device can execute a visual assessment application and display visual content continuously for an extended duration of time in the 3D virtual environment. The visual content can be displayed with predefined display parameters associated with contact lens fitting. The electronic device can obtain a stream of sensor data measured by the one or more sensors and apply at least a contact lens fitting model to generate a contact lens fitting profile for a user associated with the electronic device based on the stream of sensor data.

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 relates to the technical field of visual function diagnosis, and provides a visual function examination device based on eye movement tracking, a medium and computer equipment, the device comprises a data acquisition unit, an eye movement evaluation unit, a visual field evaluation unit and a comprehensive analysis unit, the data acquisition unit is used for acquiring visual function data of an examinee, and the comprehensive analysis unit is used for analyzing the visual function data of the examinee; the eye movement evaluation unit evaluates an eye movement function based on eye movement parameters in the visual function data; the visual field evaluation unit evaluates a visual field function based on visual field parameters in the visual function data; according to the application, objective sight drop points are used for replacing subjective keys, false negative and false positive are reduced, before typical defects do not appear in the visual field, early visual function changes can be prompted through eye movement parameter abnormity, auxiliary screening of early glaucoma and other diseases is achieved, and the visual function detection accuracy is improved. Meanwhile, the diagnosis accuracy is improved through double evidences of eye movement and visual field in the middle and late stages, and the sensitivity and specificity of visual function examination are remarkably improved on the whole.

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.

The invention belongs to the technical field of control systems, and particularly relates to a control system based on combination of dynamic focal length adjustment and vision correction, which comprises a bearing plate and a parameter configuration and feedback module, the two sides of the top of the bearing plate are rotationally connected with lens groups, and the parameter configuration and feedback module is used for collecting user information and initial matching training core parameters and sending the initial matching training core parameters; continuously receiving multi-dimensional real-time feedback, and iteratively optimizing parameters based on the feedback; the dynamic training content generation module is used for generating dynamic 2D and 3D contents and interactive games of adaptive set and adjustment training according to the training parameters optimized by the parameter configuration and feedback module; on the basis, through an adjusting and training mechanism combining hardware and software, personalized adaptation to vision requirements of different users is achieved, medical risks and high cost of laser surgery are avoided, and the problems that traditional glasses and contact lenses are limited in adaptability and inconvenient to use in daily life are solved.

A virtual eye test can be conducted to evaluate visual acuity and perception in a virtual reality (VR) environment. The test can be conducted using an electronic device that includes a head-mounted display (HMD) and a camera. The electronic device can generate a VR user interface corresponding to photorealistic virtual environment and render the VR user interface on the HMD. The electronic device can simulate one or more real-world scenarios and while simulating the one or more real-world scenarios, in real time, track eye movements and responses from the wearer for testing visual acuity and perception of the wearer.

The invention discloses a vision tester, and relates to the field of visual function measurement. The vision tester comprises a display, a computer and a selector, every two of the display, the computer and the selector are in communication connection; during vision examination, a testee is positioned right opposite to the display; the display is used for displaying sighting marks with different sizes and shapes; the selector is worn by a testee and is used for collecting a sighting mark identification result of the testee; and the computer is used for determining the vision examination result of the testee according to the identification result of the testee on the sighting mark. According to the visual acuity tester, visual acuity screening is not limited by scenes, and convenience and accuracy of visual acuity screening can be improved.

The present inventive concept provides methods of determining whether a subject has cortical or cerebral visual impairment (CVI) as well as determining whether the subject has a traumatic brain injury thereby allowing treatment for these conditions. The present inventive concept also provides a standardized method for assessing pediatric or adolescent visual acuity.

This application is directed to implementing a vision test based on an avatar in a virtual environment. An electronic device includes a head-mounted display. The electronic device executes a user application configured to enable a virtual vision test, and generates a virtual reality (VR) user interface corresponding to a three-dimensional (3D) virtual environment. The electronic device obtains user information of a user associated with the electronic device, and concurrently displays an avatar and a sequence of visual stimuli on the VR user interface. While displaying each respective visual stimulus, the electronic device determines avatar characteristics based on the user information and the respective visual stimulus, and adjusts display of the avatar adaptively based on the avatar characteristics. The avatar characteristics includes a location of the avatar in the 3D virtual environment.

An ophthalmic multifocal lens is presented, configured to provide distance vision and at least one other usable visual acuity. The lens comprises a translucent lens body having an optical axis and a refractive baseline, the refractive baseline extending to at least a portion of the lens body, and a diffraction grating configured to act as an optical splitter, extending concentrically in the radial direction and superimposed on at least a portion of the refractive baseline. The diffraction grating configured to act as an optical splitter is further configured to be continuous within at least a central 3 mm aperture, wherein the distance vision is provided by the -1st order diffraction, and the near vision is provided by the 2nd order diffraction.

Exemplary light control devices and methods provide a regional variation of visual information and sampling (“V-VIS”) of an ocular field of view that improves or stabilizes vision, ameliorates a visual symptom, reduces the rate of vision loss, or reduces the progression of an ophthalmic or neurologic condition, disease, injury or disorder. The V-VIS devices and methods generate a moving aperture effect anterior to a retina that samples and delivers to the retina environmental light from an ocular field of view at a sampling rate between 50 hertz and 50 kilohertz. Certain of these V-VIS devices and methods may be combined with augmented or virtual reality, vision measurement, vision monitoring, or other therapies including, but not limited to, pharmacological, gene, retinal replacement and stem cell therapies.

This invention provides a subjective optometry information processing program and a subjective optometry system that allow users to appropriately understand the usage status of subjective optometry devices. [Solution] A subjective eye examination information processing program is executed by an information processing device that processes information related to a subjective eye examination device, wherein the subjective eye examination information processing program is executed by the control unit of the information processing device, causing the information processing device to execute: an eye examination information acquisition step of acquiring eye examination information indicating at least one of the content of the eye examination and the time of the eye examination by the subjective eye examination device; a status information generation step of generating status information indicating the usage status of the subjective eye examination device by processing the acquired eye examination information; and an output step of outputting the status information.

A multi-channel subjective refractor can comprise a first display to generate a first image; a second display to generate a second image; a first channel to refract the first image with a first channel refraction; a second channel to refract the second image with a second channel refraction; a beam combiner to receive and to combine the first image and the second image; and a shared channel, to receive the first image and the second image from the beam combiner to refract, in combination with the first channel, the first image with a first refraction; to refract, in combination with the second channel, the second image with a second refraction; and to present the first image with the first refraction and the second image with the second refraction to an eye simultaneously.

Method for generating and displaying a video that simulates a user's vision; said method comprising an assessment step (F1) wherein a plurality of tests (T, T1, T2, T3, T4) are executed on the user to evaluate the user's visual abilities and information and indices (Q, Q1, Q2, Q3; L1, L2, L3, L4....) on the user's visual abilities are collected, an acquisition step (F2) wherein a plurality of sequential images of the same scene (H) are acquired from said two different positions, so as to have a plurality of right and left images (D1, D2, D3..... S1, S2, S3....), a post-processing step (F3) wherein said right images (D1, D2, D3.....) and said left images (S1, S2, S3....) are processed based on said information and indices (Q, Q1, Q2, Q3, L1, L2, L3, L4....) detected in said evaluation step (F1), so as to obtain aberrated binocular images (V1b, V2b, V3b), and a video playback step (F4) wherein said aberrated binocular images (V1b, V2b, V3b) are displayed on a display (200) of a visor (2) so as to playback said video (V) emulating a user's vision.

The invention relates to a device (1) for initiating an entoptic phenomenon that can be perceived by a patient, a system with a device (1) of this type, as well as a data processing unit (12) which provides the patient with information relating to the use of the device and with a functional status of their retinal vessels in a targeted manner. The device (1) according to the invention is characterised in that a housing (4) is provided with a contact surface (6) which can be placed on the head (8) of the patient in the region of the eye (7) in such a way that light emitted by the lamp unit (5) falls at least partially onto the retina (2), wherein the lamp unit (5) is designed to emit light at different times and along different beam paths in such a way that the emitted light falls in different points on the retina (2) when the contact surface (6) is in place.

This subjective optometry system for subjectively measuring optical characteristics of a subject's eye comprises: a visual target presentation means that presents a test visual target to the subject's eye; a corrective means that changes optical characteristics of a light flux emitted from the visual target presentation means; a self-optometry program setting means that sets either a first self-optometry program for automatically causing a subject to proceed through a plurality of test items for the subject's eye on the basis of an inputted response, and a second self-optometry program that is for automatically causing the subject to proceed through a plurality of test items for the subject's eye on the basis of an inputted response and that uses a test condition different from that for the first self-optometry program; and a control means that controls the visual target presentation means and / or the corrective means on the basis of the first or second self-optometry program set by the self-optometry program setting means, to cause optometry to proceed in accordance with the procedure of the first optometry program or the second optometry program.

To provide a system and method of utilizing one or more images of an eye in medical procedures.SOLUTION: The disclosure provides a system that may acquire, via an image sensor, an image of an eye of a person; may determine a location of an iris of the eye from the image; may determine a position of a suction ring from the image; may display, via a display, the image; may display, on the image via the display, a first graphic overlay that indicates the location of the iris of the eye; may display, on the image via the display, a second graphic overlay that indicates the position of the suction ring; may determine multiple iris structures from the image; may determine an orientation of the eye based at least on the multiple iris structures from the image; and may display, via the display, information that indicates the orientation of the eye.SELECTED DRAWING: Figure 1A

The application discloses a continuous zooming optometry optical system, which comprises a negative spherical thin lens L1, a positive spherical thin lens L2 and a negative spherical thin lens L3 arranged in sequence on the same optical axis, the negative spherical thin lens L1 is arranged along the optical axis, the optical center of the negative spherical thin lens L3 is located at the image-side focal point of the positive spherical thin lens L2, the optical power of the negative spherical thin lens L1 is the optical power of the positive spherical thin lens L2 is the optical power of the negative spherical thin lens L3 satisfies the following relationship, and the application further discloses a portable subjective optometry instrument comprising the continuous zooming optometry optical system. The application can accurately simulate the optometry process of the plug-in sheet optometry, the optometry process is fast, the optometry result is accurate, and the optometry and lens matching time can be greatly shortened.

The invention relates to such an optometry system comprising a computer with one or more processors programmed to: a) control the optometry device to determine a photopic value of said vision correction power of said corrective lens for each eye of said individual by achieving a photopic subjective refraction test in photopic vision, or to retrieve an initial vision correction value stored in a memory of the optometry system, or to collect an initial vision correction value, b) validate a step of placing the eyes of the individual in light conditions ensuring scotopic vision of the eye of the individual for an amount of time, c) validate a step of placing the eyes of the individual in light conditions ensuring mesopic vision of the eyes of the individual and d) control the optometry device to achieve a mesopic subjective refraction test comprising: - fogging both eyes with a predetermined fogging spherical power, - iteratively adding to both eyes a same negative predetermined value ofspherical power to said fogging test value and determining mesopic binocular visual acuities of the eyes until a maximum value of the mesopic binocular visual acuity is reached, thereby determining for each eye a mesopic raw value of the vision correction power, e) determining said mesopic value of vision correction power based on said mesopic raw value of the vision correction power.

The present disclosure discloses a method for detecting the refractive power of the human eye and related products. The method uses a light-feeding device for detection, and the light-feeding device includes a red light source and a projection light path for projecting red light to the human eye. The method includes: using the projection light path including a diffraction optical element device and a conjugate mirror to form an intermediate image plane of the red light; adjusting the distance between the conjugate mirror and the intermediate image plane according to the clarity of the fixation point observed by the human eye in the projection light path; and determining the refractive power of the human eye according to the distance when the human eye clearly observes the fixation point. Using the scheme of the present disclosure, the detection of the refractive power of the human eye can be completed during the light-feeding operation, thereby improving the efficiency of the detection of the refractive power of the human 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

The invention provides a vision change condition monitoring device, and relates to the technical field of vision detection.The vision change condition monitoring device comprises a laser speckle generation system and a cam zoom system.The laser speckle generation system comprises a laser source and a diffuse reflection disc, and the diffuse reflection disc rotates around the center axis of the diffuse reflection disc; and a slit, a field-of-view segmentation inversion system, and a radially rotating third prism, wherein the third prism rotates the incident beam. The laser source emits laser, the laser forms laser speckles after passing through the rotating diffuse reflection disc, the laser speckles form diffraction fringes after passing through the slit, the diffraction fringes are changed into two groups of fringes with opposite movement directions after passing through the view field segmentation inversion system, and the two groups of fringes reach the cam zoom system after passing through the third prism rotating in the radial direction. And finally reaching the fundus retina. The vision change condition monitoring device provided by the invention is simple and reliable, a patient does not need to distinguish the clearness of an image, astigmatism can be measured besides myopia and hyperopia, and the device is convenient to use.

The present invention relates to a system for determining a rounding value of an optical feature suitable for providing refractive correction for improving the vision of a subject, comprising one or more processors programmed to perform the following steps: a) determining a first test value and a first increment of variation of the optical feature; b) performing a first trial of a subjective test, wherein two distinct first optical conditions are determined based at least on the first test value; c) determining a second test value of the optical feature based on the first test value, the first increment of variation, and the result of the first trial; d) performing a second trial of a subjective test, wherein two distinct second optical conditions are determined based at least on the second test value; e) determining an intermediate value of the optical feature based on the result of the first trial and the result of the second trial; and f) determining a rounding value of the optical feature by rounding the intermediate value to a reference value, wherein the rounding modifies the refractive correction of the ophthalmic lens to less than a predetermined basic refractive value.