71 results about "Blindness" patented technology

Embodiments of the invention provide devices and methods for capturing text found in a variety of sources and transforming it into a different user-accessible formats or medium. For example, the device can capture text from a magazine and provide it to the user as spoken words through headphones or speakers. Such devices are useful for individuals such as those having reading difficulties (such as dyslexia), blindness, and other visual impairments arising from diabetic retinopathy, cataracts, age-related macular degeneration (AMD), and glaucoma.

A portable ocular response testing device includes a portable housing, a plurality of lights for generating visible light within two eye spaces of the portable housing, a controller for operating the lights according to a prescribed pattern, and an imaging system to capture images of the eyes under varying lighting conditions to evaluate an ocular response of a user to the lighting conditions. In some instances, the portable device is used in the field of ophthalmology for complete assessment of optic nerve defects producing Marcus-Gunn pupil, detection and quantification of color blindness, and detection and follow up of eye abnormalities. In other instances, the device is adapted for screening of driving under influence (DUI) or Driving While Intoxicated (DWI) by performing multiple eye tests resulting in field screening of DUI or DWI cases.

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 See-Through Display System with the ability to correct visual deficits such as presbyopia, color blindness and poor night vision is disclosed. This invention enables the correction of visual deficits using camera(s), microdisplay (s), controlling circuit(s) with digital grayscale control and see through optics such as free form lens / mirror, half-mirror, diffractive and / or holographic optical element(s).

Glaucoma is the second most common cause of blindness in the global world. It is a multifactorial disease with several risk factors, of which intraocular pressure (IOP) is the most important. IOP measurements are used for glaucoma diagnosis and patient monitoring. IOP has wide diurnal fluctuation, and is dependent on body posture, so the occasional measurements done by the eye care expert in clinic can be misleading. We provide an implantable sensor, based on microfluidic principles, which in one example has 1 mmHg limit of detection, high sensitivity and excellent reproducibility. This sensor has an optical interface, which enables IOP to be read with, for example, a cell phone camera. The design, fabrication, along with the option of self-monitoring are promising steps toward better patient care and treatment for this devastating disease.

A shield produces a “dazzling” effect: disorientation and temporary and fully reversible blindness in subjects for the purpose of threat deterrence. The apparatus is comprised of a plurality of light emitting diodes (LEDs) capable of intense illumination. Light emitted by each LED is further pulsed and focused by reflective optics to produce a dazzling effect. The shield further provides ballistic protection, chemical or electrical crowd control functionality, safety-glass breaking capability, optically propagated communications and an arm strap to further secure the shield.

The invention provides a detecting device for testing the eyesight of human eyes and for detecting color blindness. The device comprises a control mainframe, a test information display screen, a keypad at an input end, and a supervisory computer at an output end or another display screen which can display and record a testing result. In the detecting device, a fixedly printed visual testing chart is replaced by the test information display screen controlled by a single-chip; and the test information display screen can random display multi-directional letter ''E'' or ''C'' and pictures of different colors, so as to instantly test the human eyes. The detection is judged automatically by the single-chip, the result is displayed or printed, and the eyesight and the color discrimination ability of a testee are faithfully and objectively recorded. The detecting device can not only save work force, but also effectively avoid the disadvantage of false testing result, and is convenient for the computerized management of physical-examination materials. Therefore, the device is a safe, reliable, and effective detecting device for testing the eyesight of human eyes and for detecting color blindness.

A minimally-invasive endoscopic visual uterine cavity tissue suction tube belongs to the medical apparatus technical field. The minimally-invasive endoscopic visual uterine cavity tissue suction tube comprises a suction tube body, a suction head, a pick-up head cabin, a pick-up head, a handle, and a joint, and is characterized in that a lens of the pick-up head faces a suction hole of the suction head; the suction head and the suction tube body form an integral structure; corresponding two side outer walls of the pick-up head are provided with pick-up head limiting grooves, respectively; one side of a cabin cover facing the pick-up head cabin , corresponding to the pick-up head limiting grooves, is provided with limiting strips and the limiting strips are matched with the limiting grooves of the pick-up head. The minimally-invasive endoscopic visual uterine cavity tissue suction tube provided by the invention has the advantages of being capable of avoiding blindness, facilitating clear observation of overall embryo sac by doctors, improving surgery effect, avoiding the forced breakage of the suction head and falling off in the uterine cavity during a surgery process, eliminating surgical accidents, and reliably positioning the pick-up head to guarantee the shooting effect of the uterine cavity.

The invention discloses a design method for an optical device. Through employing a transmission spectrum design of selecting a coloring agent and the concentration of the coloring agent and carrying out the correction of blue and yellow color weakness and blindness, the method can correct the color perception of a person with the blue and yellow color weakness and blindness, and maintains or slightly changes the position of a color sense white point of a user while improving the blue and yellow color resolution.

The invention discloses a centrifugal blower vane designed based on a load method. A traditional design method for vane molded lines frequently depends on engineering experience, and blindness exists. According to the centrifugal blower vane, the load method is used for optimizing an original model vane and includes the steps that firstly, a proper average relative velocity curve is selected; then, multiple groups of load distribution functions are obtained by setting changes of loads at different positions; and afterwards, a vane molded line is determined according to load distribution. The performance of a blower can be improved through the obtained vane, a model with the middle load ratio being 0.7 is better in performance, especially under rated working conditions and small-flow working conditions, the efficiency under large-flow working conditions is gradually improved along with increasing of the load ratio, and the efficiency under the small-flow working conditions is reduced; flow in the optimized model is more stable than that in the original model, and no obvious flow separation and vortex exist; and in addition, due to the fact that no influence of separation exists, static pressure is stably increased in a vane channel, and a jet-wake structure at the position of an outlet of the vane channel is also improved.

The invention relates to a non-contact wink and heart rate combined detection system and method based on second-order blindness identification. When subjects are at a natural relaxed state, face video data comprising eyes is acquired, after original video data is acquired, a detection face area is selected, the video data is preprocessed, six-channel signals after preprocessing are obtained, and the signals are marked as x=[xR1, xR2, xG1, xG2, xB1, xB2]T; target areas in continuous frames are obtained by use of a Meanshift algorithm, and the six-channel signals are obtained by use of the same method; by taking original signals after the preprocessing as input signals, blind source separation is carried out by use of a second-order blind identification algorithm, source signals after the separation are marked as y=[y1, y2, y3, y4, y5, y6]T; signal identification and screening are performed on the separation signals y obtained in the step S101, and needed wink and BVP signals are selected by use of a kurtosis-based separation component automatic identification method; and a wink frequency and a time length of the obtained wink signals are calculated, power spectrum analysis is performed on the obtained BVP signals, and a heart rate estimation value is obtained. The method has the advantages of high accuracy, high anti-interference capability, high algorithm efficiency and the like.

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 photoelectrical 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 the 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.

The invention discloses glasses based on a digital intelligent virtual three-dimensional stereoscopic image technology and for visual detuning monitoring and rehabilitation training. The glasses comprise a large wide angle depth-of-field adjustable optical imaging system, a digital intelligent main control system, an interaction communication system with a mobile terminal and a power source system. As to the glasses, through the intellectualized digital three-dimensional image technology and optical design, a large wide angle virtual three-dimensional stereoscopic depth scene is manufactured;through interaction communication with the mobile terminal, a special APP controls all stereoscopic picture and video playing functions and related interaction operations for visual detuning monitoring and rehabilitation training of the glasses, and the glasses are provided with a software program for conducting vision and a color blindness and color amblyopia examination on a user and have an interaction communication capacity with a cloud side and a doctor, can conveniently conduct vision detection and rehabilitation training on the user at home, comprise depth-of-field adjustment, angle-of-view adjustment, reaction adjustment, contrast ratio adjustment and the like and help the user to solve all visual detuning problems.

The invention discloses a screening method for motor imagery (MI) response ability based on resting-state electroencephalography (EEG) features. The method includes the following steps: preprocessingacquired EEG data, performing data segmentation, and extracting common spatial pattern features of MI tasks; establishing a multiple classification recognition model by using a support vector machine,calculating a classification correct rate through 10-fold cross-validation, and characterizing the MI response ability by using the classification correct rate; extracting normalized energy, power spectrum entropy and Lempel-Ziv complexity of each eye-open resting lead EEG in a 8-13 Hz frequency band (alpha frequency band) respectively; calculating the correlation between the above resting-stateEEG features and the MI response ability, and screening optimal features to establish a classification model and a regression prediction model; and based on the classification model and the regressionprediction model, screening the motor imagery response ability. The method can screen out ''BCI blindness'', avoid an invalid training process, and predict the MI response ability of a subject in advance and formulate a matching training program for the subject, thereby optimizing an experimental training process and ultimately reducing an error rate of a user in operating brain-computer interface (BCI).

The embodiment of the invention provides a display control method, a terminal, and a computer readable storage medium. The method comprises the following steps: detecting a color blindness type and acolor weakness type of a user, matching a corresponding preset control policy according to the detection result, and adjusting a display color of a display screen according to the control policy. By judging the color blindness type and the color weakness type of the user and matching the appropriate display control policy, the existing problem that color blind patients cannot control the display color of the display according to their own conditions to obtain good display screen viewing experience, resulting in poor experience is solved. Meanwhile, the embodiment of the invention further provides an eye protection display mode under the display control method, wherein the eye protection display mode is provided with a trigger condition, and the eye protection display mode is graded to achieve the intelligent control and accurate control of the eye protection display mode, and the eye protection effect and the user experience of the eye protection display mode are further improved.

The embodiment of the invention discloses a visual training system. The visual training system comprises training glasses, a display device and a central processing module, wherein the training glasses are used for being worn at the eyes of a human body; the display device is mounted in front of lenses of the training glasses and used for displaying image information for visual training; and the central processing module is in communication connection with the display device, the central processing module is used for transmitting the image information for visual training to the display devicefor display, and the central processing module controls images and contents of the display screen, the training time and the number of training times. According to the visual training system and method provided by the embodiment of the invention, visual training and intelligence development are integrated, motion vision and vision diversification cross-channel interaction are realized, eyeball movement training is carried out according to the vision triple movement principle, coordination and sensitivity among all parts of the eyes are improved, vision is improved, visual fatigue is effectively relieved, the purposes of eliminating pseudomyopia and controlling occurrence and development of true myopia are achieved, and the visual training system has important significance in reducing myopia complications and preventing blindness.

Described herein are devices, compositions, and methods for improving color discernment. In particular, devices and methods for correcting color blindness comprising a hologram that enhances the ability to distinguish a desired first bandwidth by decreasing the transmission of a second bandwidth. Advantageously, the device appears not tinted to outside observer.

The invention discloses a two-dimensional visual grouting experiment box and a use method, and aims to accurately grasp the diffusion rule and the flowing property of filling slurry between broken roofs or caving gangues and facilitate people to research the filling performance, the grouting effect and other contents of the filling slurry. The two-dimensional visual grouting experiment box mainly comprises a transparent acrylic plate, fixed channel steel, screws and the like. Six transparent acrylic plates are fastened into a box body through components such as a groove structure, fixing channel steel and screws, a grouting hole is drilled in the center of a front plate of the box body, and concentric circles are drawn with the grouting hole as the center and used for observing the diffusion radius, path and effect of filling slurry. The two-dimensional visual grouting experiment box is convenient to operate, simple and easy to implement and small in size, a large amount of cost is saved, blindness and uncertainty risks of on-site grouting and filling are reduced, and scientific research and verification can be facilitated.

Retinal diseases, such as age-related macular degeneration (AMD), are the leading cause of blindness in the elderly population. Since no known cures are currently present, it is crucial to diagnose the condition in its early stages so that disease progression is monitored. Systems and methods for detecting and mapping the mechanical elasticity of retinal layers in the posterior eye are disclosed herein. A system including confocal shear wave acoustic radiation force optical coherence elastography (SW-ARF-OCE) is provided, wherein an ultrasound transducer and an optical scan head are co-aligned to facilitate in-vivo study of the retina. In addition, an automatic segmentation algorithm is used to isolate tissue layers and analyze the shear wave propagation within the retinal tissue to estimate mechanical stress on the retina and detect early stages of retinal diseases based on the estimated mechanical stress.

The invention relates to a preparation method of eyeglasses for patients suffering from color blindness and color weakness. The preparation method comprises the following steps of (1) preparing innerlayer resin eyeglasses, wherein materials of the inner layer resin eyeglasses are selected from conifer resin materials; (2) pouring an appropriate amount of deionized water into a beaker, performingheating to 70-80 DEG C, continuously adding red mixed pigment of pigment red 179, urn red 1 and pigment violet 29, and performing uniform stirring; (3) clamping the inner layer resin eyeglasses prepared in the step (1), immersing the taken inner layer resin eyeglasses in a mixed solution obtained in the step (2) for 8-10min, after dyeing is completed, taking out the dyed inner layer resin eyeglasses, and placing the taken-out inner layer resin eyeglasses at room temperature for air-drying; and (4) clamping the eyeglasses dyed in the step (3) with a fixture, performing positioning, then puttingthe eyeglasses into a vacuum film plating machine, performing vacuum film plating, performing ion gun bombardment on eyeglass surfaces in vacuum environment, enabling film plating materials to be oneyeglass surfaces through nanometer volatilization for 10 times through an electron gun, and performing stopping after the situation that the surface color of the eyeglasses becomes green is confirmed.

A visual quality assessment method and system are based on deriving a quality metric by comparing sub-band approximations of a distorted image and an undistorted version of the same image, providing a good compromise between computational complexity and accuracy. The sub-band approximations are derived from Discrete Wavelet (Haar) transforms of small image blocks of each image. Due to inherent symmetries, the wavelet transform is “blind” to certain types of distortions. But the accuracy of the method is enhanced, and the blindness of the transform is overcome, by computing quality metrics for the distorted image as well as computing quality metrics for a shifted version of the distorted image and combining the results.

Glaucoma is the second most common cause of blindness in the global world. It is a multifactorial disease with several risk factors, of which intraocular pressure (IOP) is the most important. IOP measurements are used for glaucoma diagnosis and patient monitoring. IOP has wide diurnal fluctuation, and is dependent on body posture, so the occasional measurements done by the eye care expert in clinic can be misleading. We provide an implantable sensor, based on microfluidic principles, which in one example has 1 mmHg limit of detection, high sensitivity and excellent reproducibility. This sensor has an optical interface, which enables IOP to be read with, for example, a cell phone camera. The design, fabrication, along with the option of self-monitoring are promising steps toward better patient care and treatment for this devastating disease.

The invention discloses a pair of color blindness and color amblyopia correction glasses and a preparation method thereof, and belongs to the field of optical materials. The correction glasses comprise a substrate lens and nanoparticles mixed in the substrate lens, each nanoparticle comprises a metal nanometer core capable of generating surface plasma and a film shell layer wrapping the surface of the metal nanometer core, and the film shell layer wraps the surface of the metal nanometer core through self-polymerization reaction. The size of each metal nano-core is preset, and the size of the metal nano-core corresponds to a target to-be-filtered spectrum interval of the correction mirror. According to the invention, accurate narrow-band absorption can be realized on the spectrum by adjusting the size of the nanoparticles doped into the substrate lens, so that the technical problems that the existing color blindness correction glasses cannot realize accurate color filtering according to the specific color blindness condition and the color vision correction effect is limited are solved.

The invention provides an animal magnetic resonance imaging eye protection device and a use method. The eye protection device comprises two conical eyeshades, wherein the two conical eyeshades are provided with a connecting mechanism fixed to the head of an animal; cotton gauze is arranged in each conical eyeshade; the top of the conical eyeshade is provided with a pressure type nozzle facing thecotton gauze; the pressure type nozzle is connected with an air conveying assembly; the air conveying assembly comprises a first air conveying pipe; one end of the first air conveying pipe is connected with two second air conveying pipes, and the other end of the first air conveying pipe is connected with an air adding device; the second air conveying pipes are connected with the pressure type nozzles; and a water filling opening is formed in the first air conveying pipe. The eye protection device can be repeatedly used while preventing blindness of eyes of an experimental animal, is simple tooperate, and does not affect omnibearing examination of the head, the body and the like of the animal.

One embodiment provides a method, including: identifying, using a processor, a color blindness condition associated with a user; activating, based on the color blindness condition and on at least a portion of a display of an augmented reality device, a color correction filter; and adjusting, responsive to the activating and using the color correction filter, an appearance of an object within a field of view of the portion on the display. Other aspects are described and claimed.

The invention discloses a visual clamping force device and a clamp, and belongs to manual clamps. When an existing manual clamp is used, the clamping force magnitude is difficult to determine, clamping blindness is caused, and clamping cannot be accurately achieved. A clamping body is telescopically assembled on a seat, an elastic element is mounted between the clamping body and the seat, the clamping body and the seat are provided with clamping force scales and reading indexes in a separated manner, when the object is clamped, the elastic element measures the clamping force, the reading indexes point to the clamping force scales for reading, therefore, during clamping, the magnitude of the clamping force can be directly seen and read, and precise clamping is achieved.

The invention discloses an image brightness conversion method based on a Craik-O 'Brien effect. The method comprises the steps of obtaining image information; and respectively calculating the to-be-displayed brightness of each pixel point in the image, wherein the to-be-displayed brightness is used for enabling the brightness change trend of the image to be unchanged and the brightness change amount to be increased when each pixel point is displayed according to the respective to-be-displayed brightness; and re-coloring the image based on the to-be-displayed brightness to obtain an image afterbrightness conversion. Therefore, the brightness difference in the image is increased, and based on the Craik-O 'Brien effect, because the brightness of places with different colors in a common imageis different, the brightness difference is enhanced by changing the brightness, so that the identification of human eyes on the image contour can be improved, and people can read information carriedin the image more easily. In the scheme provided by the invention, the brightness change is more obvious by changing the brightness in the picture, so that a color blindness patient with color readinginconvenience can read the information in the picture according to the brightness.