69 results about "Blindness" patented technology

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.

An apparatus produces a “dazzling” effect: disorientation and temporary and fully reversible blindness in subjects for the purpose of threat deterrence in both civilian law enforcement and military engagements without the use of lasers. A plurality of light emitting diodes (LEDs) capable of intense illumination is provided. Light emitted by each LED is pulsed and focused by reflective optics to produce a pulsed beam of sufficient intensity that the combined effect of the beams from the LEDs induces dazzling in subject viewers in the target range. Further included in or ancillary to the invention are a power source for powering the LEDs a signal source and controller for controlling their illumination and pulsing, and a shield suitable for protecting a user against projectiles.

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.

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 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.

An electronic visual headset useful for purposes of augmented reality, virtual reality, vision correction, and / or vision enhancement. The invention corrects vision impairments such as near-sightedness or far-sightedness. One embodiment uses phakometry cameras to measure the eyes' lenses. An alternative embodiment uses dynamic calibration with test images. The display may be digitally manipulated for correction of night vision, color blindness, or tunnel vision. It may also be enhanced with infrared vision, zoom, etc. Corneal eye-tracking devices and variable-magnification lenses coordinate to resolve vergence-accommodation conflict. An image of the user's eyes is displayed on the exterior of the headset.

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.