108 results about "Impaired visual acuity" patented technology

Techniques for a visual disability detection system that employs virtual reality to assess visual performance of a patient based on activities of daily living are described. The virtual reality platform can integrate the testing of different components of visual function based on activities of daily living to provide a direct and clinically relevant measure of the impact of any visual disability on a patient's daily life. By simulating daily tasks for evaluation of visual disability, clinicians can better understand from a patient's perspective how visual impairment affects their daily tasks and quality of life.

Systems and methods for handling emergency notification messages such as Commercial Mobile Alert System (CMAS) alerts. In one example use, a mobile communications device receives a text-based message, determines that the message is an emergency alert message, and forwards at least some of the content of the message to a computer system. The computer system derives, from the content of the text-based message, data or signals that render at least some of the content of the text-based electronic message into an audio format, and transmits the data or signals to the remote communications device, which then audibly plays the message. Such a system may enable additional persons to receive emergency notifications who otherwise may not receive them, for example, persons with visual impairments, or persons using communications devices that are unable to display text.

The invention discloses an operation method and an operation device of a mobile terminal. The operation method comprises the following steps: (1) receiving a touch order input by a user, (2) judging whether the touch time of the touch order reaches a first pre-set time, (3) obtaining voice information corresponding to a touch position of the touch order if the touch time of the touch order reaches the first pre-set time, and (4) broadcasting the voice information. According to the operation method and the operation device of the mobile terminal, after a long-pressing touch order input by the user is received, the function corresponding to the present touch position is informed to the user by broadcasting the voice information, and therefore a user with visual impairment can also use the mobile terminal with a touch screen.

This invention is for directly modulating a beam of photons onto the retinas of patients who have extreme vision impairment or blindness. Its purpose is to supply enough imaging energy to retinal prosthetics implanted in the eye which operate essentially by having light (external to the eye) activating photoreceptors, or photo-electrical material. The invention provides sufficient light amplification and does it logarithmically. While it has sufficient output light power, the output light level still remains at a safe level. Most preferred embodiments of this invention provide balanced biphasic stimulation with no net charge injection into the eye. Both optical and electronic magnification for the image, as for example, using an optical zoom lens, is incorporated. Otherwise, it would not be feasible to zoom in on items of particular interest or necessity. Without proper adjustment, improper threshold amplitudes would obtain, as well as uncomfortable maximum thresholds. Therefore, to adjust for these, a way of proper adjustment for the threshold amplitudes and maximum comfortable thresholds is provided. Furthermore, to the extent that individual stimulation sites in the retina give different color perceptions, upon stimulation, then colors of the viewed scene is correlated with specific stimulation sites to provide a certain amount of color vision.

A vision unscrambler for treating amblyopia, myopia, hyperopia and strabismus is composed of case body, main visual target board in the case body, and controller for controlling the flash variation of visual targets. A number of visual targets are arranged in the maximal visnal filed on said main visual target boards. The flash variation of visual targets forces eyes to move in the maximal visualfield, so exercising and coordinating the functions of eyes and promoting benigh development of eyes. Its advantage is short unscrambling period.

A method, program and apparatus for providing access to alternate images in an electronic document are provided. The present invention comprises identifying an initial image to be displayed in an electronic document (typically a web page) and then determining if alternate versions of the image are available for display. If alternate versions of the image are available, they are provided within the same electronic document. The alternate images differ from the initial image in size and resolution, allowing users with visual impairments to access larger, higher resolution images. The user accesses the alternate images by means of a selector displayed within the electronic document. When selected, the alternate image replaces the initial image in the electronic document, and the document is reformatted.

Contrast sensitivity is an informative measure of visual function, but current tools for assessing it are limited by the attentional, motor, and communicative abilities of the participant. These participants are often less able to engage with psychophysical tasks or follow an experiment's instructions, and alternative approaches have disadvantages that limit their usefulness in clinical settings. Here, we describe an efficient new measure of contrast sensitivity—‘Curveball’—that continuously infers stimulus visibility through smooth eye tracking instead of perceptual report. The procedure rapidly lowers stimulus contrast in real time until the threshold is found. The task is repeatable, well-correlated with results from conventional psychophysical methods, and sensitive to improvements in visual acuity from refractive correction. The procedure requires minimal instruction to administer and takes only five minutes to estimate a full contrast sensitivity function (CSF), which is comparable to the best existing methods available for healthy adults. Our technique relies on a minimum level of smooth tracking ability, which could limit its usefulness for participants with specific visual impairments, and we discuss potential solutions to this problem. Overall, our findings indicate that Curveball is a promising means of accurately assessing contrast sensitivity in previously neglected populations.

A method to measure gaze tracking behavior comprising, displaying, on a display, one or more variable-contrast, variable-spatial-frequency stimuli each moving from a first location to a second location. Generating ordered sequences of stimuli (“sweeps”) that are incremented upon detected tracking behavior. Generating, by an eye-tracking monitor, a gaze position signal as the visual stimulus moves from the first position to the second position, the gaze position signal detecting a position of one or both eyes. Filtering the gaze position signal by identifying gaze position samples that are not consistent with the limitations of the human eye and/or visual system. Calculating a trajectory-match score for each stimulus on each frame from comparison of that stimulus's position to the gaze position signal over a time window. Identifying the visual function of the subject in response to the trajectory-match scores. Wherein the variable-contrast stimulus increases in contrast. Wherein the variable-contrast stimulus decreases in contrast. Wherein the variable-contrast stimulus alters in a step-wise manner by multiplying the current contrast by a variable between 0.5-1.5 on each frame. Wherein the variable-contrast stimulus is exchanged for the next stimulus in that sweep sequence. Wherein indirect progress along similar sweeps is inferred and recorded. Interpolating a contrast sensitivity function (CSF) from a set of one or more sweep sequences. Detecting, empirically, the subset of one or more sweep sequences that is most informative about the CSF for a given population.

The present invention relates to a vision screening system and a method for using the system to easily perform screenings for vision disorders, including amblyopia in children using only one examiner. The system includes a lightweight, portable apparatus having a surface upon which a series of images are imprinted, projected, or digitally altered. The size, shape, appearance, arrangement, and quantity of the images are chosen to allow an examiner to rapidly screen the examinee for a visual disorder such as amblyopia. The apparatus also includes a measurement tool, integrated with the apparatus, which enables the examiner maintain the surface of the device at a predetermined distance from the examinee's eyes. To screen a child's vision, the apparatus is positioned at a predetermined distance from the examinee's eyes using the systems built-in measuring distance device. With one eye covered at a time with adhesive patches provided as part of the vision screening system, the examinee is asked to either identify an image displayed on the apparatus, or point to a matching image on a card provided as part of the system, that is located at a close distance to the examinee. Based upon the examinee's collective responses, the examiner can determine whether the examinee is affected by a visual disorder such as amblyopia. The entire system (the optotypes target apparatus with built-in measuring device, matching optotypes card, adhesive eye occluders, and instructions) are all provided in a self-contained, small, lightweight box or package for ease of transport and storage.

An image processing apparatus is operable to embed data into an image. The apparatus comprises a combining processor operable to introduce the data into a transform domain representation providing a plurality of sub-bands divided by spatial frequency components, and, in combination with a transform processor, to combine the data with the image in one of a transform domain form, the transform processor generating a transform domain form of the image, the data being combined with the image by the combining processor in the transform domain, and the transform processor generating a spatial domain representation of the combined image and data, or a spatial domain form of the image, the transform processor generating a spatial domain representation of the transform domain data, the data being combined with the image by the combining processor in the spatial domain. The data is introduce into at least one of the sub-bands in a scan direction, the sub-band representing in the transform domain low spatial frequencies of the image in one direction and high spatial frequencies of the image in another direction, the scan direction being in the same direction in the sub-band as the direction of the low spatial frequencies of the image. Since the low spatial frequencies of the image correspond to the lower energy transform domain components of the image, embedding the data in the same direction as the lower spatial frequencies provides an improved likelihood of correctly detecting the embedded data and correspondingly as a result of the improved detection likelihood, the energy of the embedded data signal can be reduced, thereby reducing any possible visual impairments to the image in the spatial domain.

The invention discloses an intelligent wearable terminal, a cloud server and a data processing method. The method comprises the following steps of carrying out character recognition on an obtained text image to obtain a text; sending the text to the cloud server to enable the cloud server to perform voice conversion on the text according to a cloud voice library to obtain the broadcast voice and feed back the broadcast voice; and performing audio playing on the received broadcast voice, so that the technical problem that people with visual impairment cannot read effectively in the prior art, can be solved.

The invention discloses an intelligent visual impairment auxiliary system based on a distributed multi-source heterogeneous sensing technology. The intelligent visual impairment auxiliary system is characterized by distributed settings, wherein a head-mounted device, a waistcoat, a waistband, a wristband, a walking stick and a blind guiding robot dog in communication connection are integrated withan infrared ranging sensor, far infrared imaging technology, a GPS, an ultrasonic ranging sensor, a depth camera, an RGB camera and other sensing modules. Collaborative data acquisition and data processing and analysis are made between multi-source heterogeneous sensors to meet the needs of different applications such as indoor and outdoor positioning and obstacle avoidance for visually impairedpeople. Compared with the prior art, the system has the functions of indoor and outdoor positioning, interactive reading and the like, can accurately obtain effective information in a complex application scene and accurately and comprehensively transmit the effective information so as to meet visual impairment assistance in different environments and help visually impaired people to effectively avoid obstacles, and is simple in structure, convenient to use and high in reliability.

The invention discloses a pleoptic device for curing vision disorder diseases in the ophthalmology department, which comprises an electric pulse generating device (10) used for generating the electric pulse for stimulating vision excitation, delivering visual information and generating visual effects, a pair of electrode plates (20) and a medicine patch (30) that is full of liquid medicine, wherein, the electric pulse generating device (10) is connected with the electrode plates (20) by a guide wire (15) and the electric pulse generated by the electric pulse generating device (10) is conducted onto the medicine patch (30) by the electrode plates (20). The medicine patch (30) contains the liquid medicine with ingredients for curing the vision disorder diseases in the ophthalmology department. The pleoptic device of the invention can effectively cure amblyopia and have a pleoptic effect on the vision disorder diseases in the ophthalmology department, such as cataract, glaucoma, optic atrophy, etc. In addition, the pleoptic device of the invention also has the eye health function.

The invention discloses a page processing method and device, and relates to the field of data processing. The page processing method comprises the following steps: identifying identity information ofa user browsing a page; and if it is identified that the user is a visual impairment user, responding to the page content triggered by the user, and outputting the page content in a voice form, so that the user obtains the page content. According to the page processing method, a visual impairment user can conveniently obtain webpage content, so that the page operation efficiency of the user is improved.

The present invention provides an intelligent switch panel-based gesture control method, a switch panel and a switch system, which are applicable to the field of intelligent switch control. The method includes: recognizing and judging whether a touch control operation continues through a plurality of press touch regions; and if so, recognizing a sliding region or a sliding direction, and executing an adjustment command and an on/off command according to the sliding region and the sliding direction; otherwise, judging whether the touch time is greater than a preset time; if so, executing a hidden command corresponding to a touched region(s); and otherwise, executing an on/off command corresponding to the touched region(s), wherein the number of the touched region(s) is one or more. By means of the intelligent switch panel-based gesture control method, the switch panel and the switch system of the present invention, by controlling the on/off status of an electric device through circle and direction sliding gestures, the operation efficiency of users is improved. Especially for the users with visual impairments, the operation accuracy can be substantially improved, and lamplight brightness, air conditioner temperature, etc. can be accurately controlled by sliding in surrounding auxiliary regions of the intelligent switch panel, thereby substantially improving the user experience.

The embodimentsof the invention disclose a touch control method and device of an electric bed, equipment and a storage medium. The touch control method includes the steps: a target touch control gesture of a user in a touch control area on the electric bed is obtained; the target touch control gesture is controlled to be matched with touch control gestures in preset user data to obtain a target gesture type; and according to the working mode and/or working parameters associated with the target gesture type, the electric bed is controlled. According to the technical scheme of the embodiments, compared with existing electric bed control schemes, related operation such as finding a remote control is not required to perform, touch gestures are input in the touch control area of the electric bed to control the electric bed to adjust to the required state, the operation process is simple, especially for elderly, illiteracy or visual impairments, use is convenient, and user experience is improved.

The present invention relates to an apparatus and method for the assessment and rehabilitation of vision impairment. In particular, the invention is concerned with an apparatus displaying visual stimuli and the method of using this device for the purpose of assessment and rehabilitation of individuals with acquired brain injury and visual impairment resulting therefrom. The apparatus comprises a display means with a plurality of visual stimuli switched on and off in predetermined sequences. The sequences are adapted to be used to assess and rehabilitate a person's visual impairment.

The embodiment of the invention provides a method for displaying the picture of an embedded set top box. The method comprises the following steps: acquiring the GRB value of a pixel point in a picture to be displayed by an embedded set top box; calculating based on the RGB value of the pixel point, the preset background RGB value and the preset transparency to obtain a display RGB value of the pixel point; and displaying the pixel point on a display screen based on the display RGB value of the pixel point. The invention also discloses an embedded set top box correspondingly. By setting the background RGB value and the diaphaneity of the display picture, the invention can be set in the background color for protecting the eyesight to display the picture, thereby avoiding the eye strain or the visual impairment caused by watching televisions for long.