389 results about "Visual acuity" patented technology

This application is directed to implementing a vision test by an electronic device having a head-mounted display (HMD). The electronic device executes a user application associated with the vision test, and obtains an instruction to implement a target vision test. A target user interface is selected between a virtual reality (VR) user interface corresponding to a three-dimensional (3D) virtual environment and an augmented reality (AR) user interface corresponding to a 3D AR environment. The electronic device implements the target vision test on the target user interface. In some embodiments, the VR user interface has a background view (e.g., a static beach view, a static city night scene, a dynamic traffic view) on which visual stimuli are overlaid. In some embodiments, the electronic device enables the AR user interface by setting the HMD to show a field of view and overlaying visual stimuli on the field of view.

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.

The invention relates to the technical field of aeronautical manufacturing and robot assembly, and discloses an aeronautical landing gear cable teleoperation collaborative assembly system and method, and the system comprises a master end interaction subsystem, a slave end assembly subsystem and a central control processing subsystem. The method comprises the following steps: acquiring multi-modal data through an environment monitoring camera, a six-dimensional force sensor and a touch sensor, and realizing space-time registration and state estimation by using Kalman filtering; and planning an optimal path by using a genetic algorithm based on the digital twinborn model and providing augmented reality guidance. And the system calculates visual confidence in real time, and adaptively switches a vision dominant control mode according to the visual confidence: when the vision is limited, the rigidity of the mechanical arm is automatically reduced, the force feedback weight is enhanced, and an operator is assisted to complete compliant operation in a blind area. According to the invention, the problems of sensing shielding and precise control of flexible cable assembly in a narrow cabin are solved, and the safety and efficiency of assembly operation are improved.

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 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.

The invention belongs to the technical field of femtosecond laser processing, and particularly relates to a femtosecond laser-based surface bulging out-of-focus lens processing method, which is used for processing a micro-lens array with the out-of-focus amount continuously changing from the eye side to the temporal side based on a plurality of bulging units. The cavity structure is machined below the bulging unit based on multiple laser control, the cavity structure provides a preset transformation foundation for subsequent secondary machining, the bulging unit is conveniently converted into a micropore structure, and after conversion is completed, the light transmittance does not obviously change. Under the condition that the light transmittance meets the requirement, the vision correction defocus lens which better meets the requirement for the real defocus amount of the retina and can prolong the service cycle after secondary processing is achieved.

The utility model relates to the technical field of sitting posture auxiliary tools, and discloses a hidden type eyesight protection posture correcting table which comprises a basic part rotationally arranged on an installation reference and provided with a first position and a second position; the limiting piece is rotationally arranged on the basic piece, the limiting piece is provided with a third position and a fourth position, and the limiting piece comprises a limiting part used for correcting the sitting posture; when the basic part is located at the first position and the limiting part is located at the third position, the limiting part of the limiting part is located below a datum plane formed by the installation datum, and when the basic part is located at the second position and the limiting part is located at the fourth position, the limiting part of the limiting part is located above the datum plane. According to the utility model, a two-stage overturning mode is adopted, so that the limiting piece is completely hidden below an installation reference, and the problem that the existing limiting piece can only be partially hidden is solved; and when the limiting part of the limiting piece is positioned above the reference surface, the user is guided to recover to a correct sitting posture state through the limiting piece, so that the vision health of the user is protected.

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.

1. Name of the product in this design: Vision Adjustment Measuring Instrument (Dual-Cylinder). 2. Purpose of this design: This design is for eye protection and vision adjustment. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention relates to a visual aid (1) comprising at least one imaging optic (2) with variable focal length for positioning between a viewer's eye and a scene to be viewed, further comprising means for controlling the change in focal length of the at least one imaging optic, optoelectronic means (3) for determining the distance of the imaging optic (2) optionally from one or more nearest objects in the scene to be viewed in the viewing direction of the viewer's eye and / or with a selectable angular tolerance around the viewing direction of the viewer's eye, electronic means for controlling the means for controlling the change in focal length of the at least one imaging optic (2), wherein said determined distance is converted into a target focal length of the at least one imaging optic (2) by means of a table of values ​​and / or by means of an equation.as well as an energy source for the aforementioned optoelectronic and electronic means and the means for control. The invention further relates to a method for vision correction and a computer program.

This application relates to the field of data processing technology, and in particular to a data fusion method and system based on neural pathways. The method includes the following steps: First, acquiring electroencephalogram (EEG) data and eye-tracking (EMT) data, aligning them using timestamps, and preprocessing them separately; then, extracting EEG features based on the preprocessed EEG data; extracting EMT features based on the preprocessed EMT data; next, fusion of features based on the EEG and EMT features by downsampling the data; finally, evaluating the synergy of the fused features. This application constructs a complete evaluation system by building a framework from a stimulus-visual paradigm to a signal acquisition platform and analysis methods related to neural structures. The time delay between the most relevant points in the time domain of eye-tracking and EEG features is used as an indicator of brain-eye synergy. The difference between these indicators has interpretability based on physiological structures, constituting a novel evaluation indicator for brain-eye synergy when assessing dynamic visual acuity.

The utility model discloses a kind of visual calibration device of astigmatism eye focal line, comprising: axial position scale board, board face is printed with E-type visual target for distant visual detection;Cross visual target disc, coaxially rotatably embedded in through-hole;Several groups of pinholes, each group is arranged along visual target line two sides straight line, pinhole center connecting line is parallel with corresponding visual target line;Fixed shaft is through cross visual target disc center, and is mechanically connected with transmission device;LED light source, set in axial position scale board back surface.The utility model has beneficial effect: the utility model can provide clear and visible and invariable measured astigmatism eye objective existence astigmatism focal line of the person being examined, and can accurately determine the clear criterion that cross visual target line coincides with the focal line, so as to maximumly improve the accuracy of astigmatism eye astigmatism axial calibration, reduce the deviation of calibration astigmatism axial direction and actual astigmatism axial direction, improve determination accuracy and determination work efficiency.

One embodiment provides a system and method that combine at least one flat. wide aperture telephoto lens with an objective lens, in the same overall lens structure with any common corrective or tinted eyeglass lens in a frame offering simple adjustability for intraocular distance. The invention thus allows for binoculars with strong telephoto magnification and fine focal detail with no need to adjust proper focus for any viewer's visual acuity, and simple gaze shift to and from telephoto view and any different typical eyeglass lens, all in a common eyeglass form that is lightweight enough and. thin enough for constant comfortable wear. Other embodiments are described herein.

The utility model provides a rotary switching type vision corrector. The rotary switching type vision corrector comprises a corrector handle and a lens rotating frame, a first lens is arranged on the lens rotating frame; the transmission mechanism is used for driving the lens rotating frame to axially rotate around the central shaft; the transmission mechanism comprises a transmission rod or a driving motor which is used for transmission connection, and further comprises a corrector panel which is connected with the corrector handle or integrally formed with the corrector handle. A lens through hole for accommodating a lens is formed in the corrector panel, and a second lens is arranged in the lens through hole; when the first lens rotates to the position of the second lens, the first lens and the second lens coincide with each other in the vertical direction, and superposition of lens degrees is achieved. In practical application, the visual state can be adjusted more conveniently, and better correction and eyesight protection effects are achieved.

1. Name of the product in this design: Vision Training Heated Eye Mask (3D Micropores). 2. Purpose of this design: for blocking light, applying heat around the eyes, and vision training. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key features: the front view. 5. This design is for a thin product, therefore the left view, right view, top view, bottom view, and perspective view are omitted.

A UV-laser-based system (UVL-LVC system) for correcting the impaired vision of a patient's eye has a UV-laser source, which emits laser radiation to treat the patient's eye, and imaging optics for focusing the laser radiation onto the cornea of the patient's eye. The imaging optics allow a detection of a reflection of radiation, which is emitted onto the cornea of the patient's eye with the imaging optics and is at least partly reflected by the cornea of the patient's eye back into the imaging optics at an acceptance angle χMax of at least 2.5°. Additionally a method for centering a UVL-LVC system is disclosed.

The invention discloses eye-protecting TFT (thin film transistor) liquid crystal panel glass, a preparation method and a liquid crystal display screen, and the preparation method comprises the following steps: cutting white glass, performing edging and chemical strengthening treatment to form TFT liquid crystal panel glass, and cleaning the TFT liquid crystal panel glass; manufacturing five liquid crystal display film layers on the inner side of the cleaned TFT liquid crystal panel glass; eight optical film layers which are stacked layer by layer and are different in thickness are designed on the outer side of cleaned TFT liquid crystal panel glass, optical film coating of the TFT liquid crystal panel glass is completed, the transmissivity of the TFT liquid crystal panel glass obtained after film coating is made to be larger than or equal to 94.5%, and the illumination perspective wavelength range is 630-750 nm. The eye-protecting TFT liquid crystal panel glass is prepared by the preparation method. The liquid crystal display screen comprises the eye-protecting TFT liquid crystal panel glass. The liquid crystal display screen of the prepared TFT liquid crystal panel glass has a good eye protection effect, so that the eyes can see display devices and the display screen more clearly and more easily, the eyes are better protected, the naked eye vision is improved, the blood circulation is accelerated, and the vision is healthier.

The application of a steroid compound in the preparation of a medicine for preventing and / or treating floaters. The steroid compound can have a good treatment, alleviation and prevention effect on floaters, can greatly alleviate and / or cure floaters, and improve visual clarity.

A system and method for assessing gaze stability and vestibular function using a mobile device are disclosed. The system includes a mobile application configured to execute gaze-stability testing protocols, a display module for presenting visual targets, a head-movement and eye-tracking module utilizing real-time video captured via the device's camera, a speech-recognition module for processing verbal responses, and a data-processing module to analyze head-movement and visual-acuity data. The system enables remote patient assessments and includes protocols such as static visual acuity, visual processing, and mobile gaze stabilization tests to evaluate metrics like peak head velocity and visual acuity. Results can be processed in real-time and can be securely transmitted to clinicians for remote evaluation. The disclosed system provides a cost-effective, user-friendly telehealth solution for vestibular function assessment, eliminating the need for specialized equipment or clinical visits.

The utility model discloses a visual skiascopy optometry unit which comprises an electric optometry head, a vision rod and a skiascopy mechanism. The vision rod is installed on the electric optometry head and can be placed right in front of the electric optometry head, and a deviation mechanism enabling the vision rod to deviate towards the two horizontal sides is arranged between the vision rod and the electric optometry head; the skiascopy mechanism comprises a body and a skiascopy lens; the body is installed on the vision rod and is a set distance away from the electric optometry head, and a swing mechanism enabling the body to swing leftwards and rightwards and forwards and backwards is arranged between the body and the vision rod. The skiascopy lens is installed in the body, and the body is further provided with a rotating mechanism enabling the skiascopy lens to rotate. According to the visual skiascopy optometry unit, full-automatic visual skiascopy optometry can be achieved, operation is convenient and fast, and the inspection result is accurate.

A near-eye ophthalmic simulation device comprising a microdisplay (101), a light source (102) forming an exit pupil (103) at an exit pupil plane (105), to create a projected pattern on viewer's retina (112) appearing at a virtual image plane (109) when the user's pupil (106) substantially coincides with the exit pupil plane (105). A variable focus lens (108) placed to substantially coincide with an optical conjugate plane (111) of exit pupil plane (105), to control the virtual image distance (110) and the virtual image plane (109) location is comprised. Projected pattern carries visual information to simulate post-operative vision, distance whereof independently controllable by the variable focus lens (108).

Tactile floor guidance system for persons with impaired vision, comprising an arrangement of guidance elements (100) laid on a floor with a tactilely perceptible surface structure (120), wherein the arrangement extends along a predefinable path to guide persons along this path, and wherein the arrangement of guidance elements (100) includes at least one curved guidance element (300) in addition to straight guidance elements (200).

A computer program is provided that includes an artificial intelligence-based model, wherein the computer program is designed to, when implemented by a computer, use the model to enable the computer to determine information characterizing a treatment plan for said refractive eye surgery based on information characterizing a patient and information characterizing the visual impairment of the patient's eye to be corrected by said refractive eye surgery.

The invention discloses a control method, device and equipment for a visually impaired person friendly scrubber and a medium, the control method for the visually impaired person friendly scrubber comprises the steps of collecting an environment image through a visual module of the scrubber, constructing a space model containing obstacle state information by utilizing cloud artificial intelligence, and planning a cleaning path according to the space model; a user is actively pulled to move through the driving module, and guiding type cleaning is achieved. In the cleaning process, the system continuously monitors environment images and dynamically compares obstacle state changes, once abnormity is detected, the system uploads an image of a change area to a cloud end for accurate type recognition, and a recognition result is fed back to a user in a multi-sense-organ mode such as voice and vibration. According to the method, a user with visual impairment can independently and safely operate the scrubber through non-visual perception, the problem that in the prior art, adaptability is poor is solved, and barrier-free use experience and safety of products are improved.

The utility model discloses an eyepiece capable of adjusting diopter and eyeshade height, and relates to the field of microscopes. The eyepiece comprises an eyepiece seat, an eyeshade is arranged at the upper end of the eyepiece seat, a horn-shaped eye bearing cover is arranged at the upper end of the eyeshade, and the eyeshade is in threaded connection with the eyepiece seat; a diopter focusing ring is sleeved outside the eyeshade in a clearance mode, the diopter focusing ring is fixedly connected with the upper end of a diopter adjusting cylinder installed at the lower end of the diopter focusing ring, the middle of the diopter adjusting cylinder is fixedly connected with the lower end of the eyepiece seat, and the lower portion of the diopter adjusting cylinder is connected with a rear connecting seat through threads. Compared with the prior art, the visual acuity of the eyepiece and the height of the eyeshade can be adjusted, the focal length of the system can be adjusted through the eyepiece with the adjustable visual acuity so as to adapt to the vision difference of different users, and clear imaging can be achieved without wearing glasses; the eyeshade with the adjustable height can help the eyes of the user to keep a proper distance from the eyepiece and ensure that the eyes are within an exit pupil distance range designed by the microscope, and incomplete view or blurred imaging caused by distance deviation is avoided.

A shoe having a sole. The sole includes a midsole including multiple midsole portions. A first midsole portion is an inner portion of a first midsole material. A second, midsole portion of a second midsole material circumscribes the first midsole portion, and a third midsole portion formed of a third midsole material circumscribes the second midsole portion. The second midsole portion has a greater durometer hardness than the first midsole portion. The third midsole portion has a different durometer hardness than the second midsole portion. The second midsole portion is of a different color than each of the first midsole portion and the third midsole portion. An outsole secured to the midsole is sufficiently translucent so that the first, second, and third midsole portions are visually discernable one from another by a person of normal, unaided vision viewing the outsole.

The application relates to a zero-character full-symbol medication guidance system based on a fool-proof design, and belongs to the technical field of medical safety. The system comprises seven pure graphical symbol modules of medication frequency, medication time, medication dose, medication route, contraindication warning, adverse reaction treatment and missed medication treatment. The modules are visually distinguished by unified color, shape and line type, and are combined into a complete information chain in a fixed order of frequency, time, dose, route, contraindication, adverse reaction and missed medication, and are printed or displayed on a medicine box, a medication guidance sheet or a prescription carrier. The application migrates the picture priority and fool-proof and error-proof operation national standard system in the construction industry to a medical medication scene, fundamentally eliminates medication misreading risks caused by ambiguous characters, character ambiguity and cultural level differences, realizes the instinctive recognition and accurate execution of the whole population such as illiterates, the elderly with low vision and cognitive impairment, and has the remarkable technical effects of zero learning cost, full-process coverage and low cost and easy popularization.