18 results about "Near visual acuity" 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.

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.

In some examples, visual acuity interpretation based mass spectrometry (MS) and tandem mass spectrometry (MS / MS) spectrogram deconvolution may include receiving, for an ion to be identified, a plurality of expected ion spectrograms, where each of the plurality of expected ion spectrograms may include at least one expected peak profile; receiving an observed ion spectrum, the observed ion spectrum comprising at least one observed peak profile; and identifying characteristics of the expected ion spectrum and the observed ion spectrum. The characteristics may be analyzed to determine ion scores, where the highest ion score may be used to identify a corresponding expected ion spectrum. An indication and / or graphical user interface display of the expected ion spectrum corresponding to the highest ion score may be generated.

The present invention is directed to methods for the use of 5'-adenosine diphosphate ribose (ADPR), and compositions thereof, for improving visual acuity, for example, in subjects having low / poor visual acuity resulting from an eye disease or condition.

The invention discloses a triple-band optical auto-calibration fundus imaging apparatus and method for robotic ophthalmic OCT imaging, comprising: a central optical path including a fundus lens, short-pass dichroic mirror, intermediate optical calibration module I, long-pass dichroic mirror, intermediate optical calibration module II, and infrared camera; two lateral infrared cameras disposed at specific angles relative to the central optical path; an annular light ring surrounding the fundus lens; a visual induction display positioned below the long-pass dichroic mirror; an OCT sample arm with electric lift control; and an OCT optical path beneath the short-pass dichroic mirror. The apparatus captures facial, ocular, and gaze direction data, directing OCT beams through the pupil, eliminating the need for head fixation during robotic ophthalmic OCT imaging. Visual guidance reduces gaze-induced artifacts and automatically adjusts the OCT optical path to accommodate different visual acuities, enhancing robotic ophthalmic imaging efficiency and quality.

The invention relates to the related technical field of vision regulation and control, in particular to a regulation and control device based on low-frequency flickering red light and a use method. The regulation and control device comprises a light source unit, a control unit, a carrier structure and an auxiliary module; the low-frequency flicker mode simulates the physiological rhythm of a visual system, the visual neural pathway and ciliary muscles are more easily activated compared with continuous light, the visual acuity improvement amplitude is improved by 30% or above compared with traditional red light equipment, and the adjustment lag is reduced by 25%; the nerve activation effect of the 40Hz frequency group is consistent with the PV neuron experiment of the Southern Science and Technology University, the space learning ability can be enhanced, the adaptation rate of sensitive people reaches 98% or above, and the short-time design of 3-5 minutes fits fragmentation time and adapts to home, travel and office scenes; the wavelength stability of the LED light source is + / -10nm, and the modular control design enables the consistency error of batch production to be 1t; 5%; aBS + PC materials are anti-falling and durable, heat dissipation holes are matched with aluminum cooling fins, it is ensured that the running temperature of equipment is smaller than or equal to 40 DEG C, and large-scale production and daily use reliability are both considered.

Approaches for implementing therapeutic activities comprising visual challenges and tasks for improving visual acuity and stereoscopic acuity for management of binocular vision disorders are described. In an example, the computing device may generate two sets of visual elements with different visual characteristics, with each set corresponding to each eye of the user. The visual elements may be displayed based on values of element attributes such as contrast, size, spatial frequency and speed. The user may then be prompted to provide a response. Based on received user's response, the element attributes may be modified, and new sets of visual elements may be displayed. In another example, visual elements with two images separated by a certain offset may be displayed. The user may be prompted to provide a response. Based on user's response, the offset value of one of the visual elements may be modified and modified visual elements may be displayed.

The invention relates to the technical field of myopia prevention and control and ophthalmology optics, and discloses a myopia prevention and control optical element with a spectral selectivity contrast adjustment function and an active system. In order to solve the problems of granular sensation, full-spectrum white fog sensation and incapability of accurately utilizing longitudinal chromatic aberration to provide spectral selective contrast regulation signals in the prior art, a nano scatterer of 1nm-150nm is arranged on the inner / surface of an optical substrate, and the contrast of a short wavelength channel is lower than that of a long wavelength channel by utilizing Rayleigh scattering, so that the specific haze difference requirement is met; the active system can dynamically regulate and control the contrast in cooperation with the light-emitting source and the control module. The lens is free of granular sensation, does not sacrifice central visual acuity, is suitable for spectacle lenses, hanging lenses and the like, and can be combined with a defocus lens and a far image screen to realize efficient myopia prevention and control.

Lenses and methods for improving peripheral and central vision of a patient are provided. The lens improves vision by having optics configured to provide optimal peripheral vision that minimize off-axis astigmatism at, for example, 20 degrees eccentricity, while maximizing in-axis visual acuity and contrast sensitivity. The method provides a design of an IOL that reduces optical errors in images generated in peripheral retinal locations of a patient's eye at a distance from the foveal center while maximizing coaxial visual acuity and contrast sensitivity.

Disclosed herein are methods of improving visual acuity, field of view, and other visual function indicators comprising administering an alpha-2 adrenergic agonist to a mammal in need thereof.

Implants comprising steroid dimers for use in improving vision and treating ocular disorders and conditions are provided. Said steroid dimers have the structure D1-L-D2 with D1 and D2 preferably being dexamethasone with the dexamethasone radicals linked by a hydrolyzable linker L. The implants provide for a controlled release of the dexamethasone with any treatment potentially involving the use of multiple implants intravitreally administered no less than 1 month, preferably no less than 3 months after intravitreally administration of the prior implant. The implants may also be used in conjunction with other therapeutic agents including anti-inflammatory or angiogenesis factors. These implants have utility in improving visual acuity, treating vision deterioration and treating ocular disorders and conditions, in particular by decreasing central subfield thickness.

The utility model provides an optometry device. The optometry device comprises an objective optometry module and a subjective optometry module. The objective optometry module comprises a beacon light source and a wavefront sensor, when objective optometry is carried out on the human eyes through the optometry device, light emitted by the beacon light source can reach the fundus of the human eyes through a beacon light path and a wavefront measurement light path, and the light is reflected by the fundus of the human eyes and then reaches the wavefront sensor through the wavefront measurement light path, so that the refractive error of the human eyes is objectively measured; the subjective optometry module comprises a sighting target display device and a sighting target objective lens, the sighting target objective lens is movably arranged in the optometry device, the sighting target objective lens can move in and out of a sighting target light path, and when the sighting target objective lens is located in the sighting target light path, the sighting target display device can be located on the focal plane of the sighting target objective lens. According to the optometry device and the binocular optometry device provided by the invention, in the optometry process in which far vision and near vision of human eyes need to be measured at the same time, the number of used equipment can be reduced, the operation steps are simplified, and the optometry time is shortened.

The application provides a myopia control contact lens, comprising a lens body, wherein a dioptric correction area is arranged on the lens body, a central clear area is arranged in the middle of the dioptric correction area, a central enhancement induction area is arranged in the middle of the central clear area, a plurality of point diffusion areas and at least one focal ring with a defocus amount distribution are arranged on the periphery of the central clear area. According to the application, the focal ring and the central enhancement induction area form a point focal ring in front of the retina, and the influence on visual acuity is minimal when the myopia control adjustment is normally carried out through optical defocus; and while the myopia control is carried out through defocus, the point diffusion area can change the scattering of light, thereby reducing the contrast of image imaging, the lens adjusts the contrast and the visual signal of optical defocus through the defocus area and the point diffusion area to delay the increase of the axial length, thereby achieving a better myopia control effect.

The refractive error of a user's eye is estimated by receiving a measure (21) of visual acuity VA of the user's eye, referred to as a reference VA measure, and data (22) relating to different, respectively associated blur levels, referred to as reference blur data, referred to as a reference blur data, referred to as a reference blur data, referred to as a reference blur data, of the user's eye. Reference VA measurements are performed within a reference measurement period by applying respective levels of blur on the user's eyes. A generic model (23) relating to the theoretical VA, the theoretical blur data and the theoretical refractive error is embodied as a specific model (24) of the eye of the user from the reference VA measurement and the reference blur data, and information (25) relating to the refractive error of the eye of the user is generated and provided from the specific model. The method is applied to vision follow-up visit and myopia, hyperopia and astigmatism control.

The application provides a virtual reality-based visual acuity comprehensive evaluation system and method, which comprises a virtual reality helmet, a handle, and a host terminal; the virtual reality helmet is used for presenting a virtual reality environment to a subject and collecting real-time eye movement data of the subject through an eye movement collection module; the handle is controlled by a single hand of the subject and is used for collecting a visual target model judgment result of the subject; the host terminal is composed of a central processing unit, a memory, a transmission module, a display, and an input device, contains an environment module, an information recording module, an evaluation calculation module, and a result module, is used for providing a virtual environment, collecting data information and completing data processing, and then presenting a result through a host display; the evaluation calculation module contains static visual acuity test, dynamic visual acuity test, and motion visual acuity test units, visual target model data and eye movement data in a test process are collected through different module tests, visual acuity abilities of the subject in different modes are evaluated, and effective help is provided for visual acuity evaluation and scientific research needs.

A method for assessing a person's visual acuity using a mobile device, the mobile device including at least one front-facing camera and a screen, the method comprising: - a user positioning step, during which a user of the mobile device positions themselves in front of a mirror at a predefined distance d / 2; - a mobile device positioning step, during which the mobile device is positioned such that the front-facing camera of the mobile device faces the mirror; - a distance measurement step, during which a distance d between the front-facing camera of the mobile device and a virtual image of the mobile device in the mirror is measured; - a display step, during which the screen of the mobile device displays optometry text; - an assessment step, during which the user's visual acuity is assessed.

A device for determining a value of a parameter representative of a visual behavior of a person, a handheld digital device and a computer-implemented method are disclosed. The device is configured to determine a first visual acuity of the person by displaying at least one first optometry font whose size varies according to a distance between the device and the person during the display such that a corner size of the at least one first optometry font is fixed from a viewpoint of the person. The device is further configured to determine a first relative motion that is a relative motion of the person relative to the device during the determination of the first visual acuity.

Lenses and methods for improving peripheral and central vision of a patient are provided. The lens improves vision by having optics configured to provide optimal peripheral vision that minimize off-axis astigmatism at, for example, 20 degrees eccentricity, while maximizing in-axis visual acuity and contrast sensitivity. The method provides a design of an IOL that reduces optical errors in images generated in peripheral retinal locations of a patient's eye at a distance from the foveal center while maximizing coaxial visual acuity and contrast sensitivity.