Abstract:
The implantable eyelid electrode apparatus includes a body of nonconductive material having first and second edges and first and second ends. A longitudinal axis extends between the first and second ends and a distance from the longitudinal axis to at least one of the first and second edges decreases towards at least one of the first and second ends. Conductive material is positioned at a surface of the body and at least one lead wire is in electrical contact with the conductive material. Further, the conductive material may include a number of conductive electrodes which are capable of being connected as an anode, a cathode, or left in an open configuration. The conductive electrodes may be strip electrodes positioned perpendicular to the longitudinal axis, and further, the plurality of conductive electrodes may be configured in a guarded multipolar configuration. An electrode device may be implanted in the upper eyelid or the lower eyelid or both. Moreover, a method for implanting an electrode apparatus includes positioning the electrode apparatus adjacent the orbicularis oculi muscle fiber such that the conductive material of the implantable eyelid electrode is adjacent the surface of the muscle fibers. The conductive electrodes, which may be of a strip configuration, are positioned with their length perpendicular to the muscle fibers, when implanted, to promote current passing parallel to the muscle fibers.
Abstract:
Dynamically functional intra-ocular prosthesis. The prosthesis includes an implantable intra-ocular lens and microelectronic components mounted on the lens. One embodiment is a variable focal length implantable intra-ocular lens system for adjusting the focal length of the implantable lens. In one embodiment, a micromotor changes the tension in a band encircling the peripheral portion of the deformable lens changing its shape to vary its focal length. Another embodiment is an artificial intra-ocular lens which serves as a holding substrate for microelectronic components that form part of a prosthesis to stimulate the neural elements of the eye to restore vision to patients who are blind from retinal disease.
Abstract:
Microscopic photo-diode devices (10) with semi-transparent surface electrodes are combined with a liquid or other suitable vehicle and injected into the sub-retinal space in order to transduce incident light into electric current which stimulate the overlying cellular layers of the retina. The devices may be micro-spheres, micro-cylinders or other shapes. An off center embedded ferromagnetic layer will confer magnetic susceptibility to the devices and an applied magnetic field will align them within the sub-retinal space directing their photoactive surface toward incident light. Alternatively, they may be embedded, pre-aligned, in a transparent flexible sheet (122) permeable to nutrients and oxygen before implantation into the sub-retinal space. The sheet will dissolve leaving separate units behind in an arranged pattern. The devices may be of the PiN-type or NiP-type or a combination of both. An electric capacitor layer (146) may also be incorporated into the device to allow charge storage during exposure to light and charge release in darkness producing an opposite polarity current.
Abstract:
The present invention involves a method of treating a patient by providing a signal that is exponential in character (82) to the patient (84). The signal includes a relatively low-frequency, constant amplitude, periodic-exponential first component (86). Further, the signal preferably includes a relatively high-frequency, periodic-exponential second component (78). The present invention also includes a method and apparatus for noninvasively applying an electrical signal to a structure associated with the eye of the patient (170). The signal is provided to the structure associated with the eye in the preferred embodiment of the invention by positioning a device for conducting the electrical signal (172a, 172b) at a point on the exterior of the patient that is substantially interior to the bone structure (224, 226) defining the eye socket. Preferably, the electrical signal is shaped such that an electrical charge is imparted to one or more structures associated with the eye.
Abstract:
Es werden eine Vorrichtung und Verfahren bereitgestellt, mit welchen ein Retinaimplantat (12) über Infrarotstrahlung mit Energie versorgt werden kann. Hierzu wird Infrarotlicht von einer Infrarotlichtquelle (14) beispielsweise in ein Brillenglas (13) eingekoppelt und durch eine Auskoppeleinrichtung (17) zu einem Auge (10) hin ausgekoppelt, um das Retinaimplantat (12) zu beleuchten.
Abstract:
The invention proposes an electrode system (2; 100) for treating dry eye, comprising one or more electrodes wherein (a) a portion of said one or more electrodes intended to be applied in contact with the eye, the eye orbit, the temple, the eyelid areas or a part of them respectively imitates the shape of the eye surface, the eye orbit, the temple, the eyelid areas or a part of them or wherein (b) a portion of said one or more electrodes intended to be applied in contact with the eye, the eye orbit, the temple, the eyelid areas or a part of them is flexible and adaptable in its shape in such a way that in the cases (a) and (b) a form-fit coupling is achievable between said portion of said one or more electrodes and the surface shape of the eye, the eye orbit, the temple, the eyelid areas or a part of them. Said portion of said one or more electrodes is fed or feedable with an electromagnetic wave of distorted sinusoidal current with a resonance frequency, preferably a 4 MHz resonance frequency, which includes the related harmonics, preferably at least the second and the third harmonic. The invention also relates to a corresponding electrostimulation device, a method for the treatment of dry eye and uses of the electrode system and of the electrostimulation device for the treatment of other diseases of the eye.
Abstract:
The present invention relates to a photosensitive pixel structure (10). The pixel structure (10) comprises a substrate (15) and at least one photosensitive diode (12, 12', 12"), a stimulating electrode (14), and a resistor (16). The resistor (1 6) is electrically connecting the stimulating electrode (14) and a counter electrode (18). Further, the resistor (16) is at least partially covered by the stimulating electrode (14) and/or the resistor (16) is at least partially covered by the counter electrode (18).
Abstract:
Systems and methods for detecting and displaying obstacles to visually impaired persons are disclosed. Images from a captured scene are analyzed to detect obstacles. A V-Disparity algorithm is employed to detect the ground plane and remove it from the images, thereby enhancing the capacity of retinal implants to display only obstacles. The system includes cameras to capture images; a processor with memory to detect obstacles in the captured images, to remove a ground plane, and to calculate a map of pixels representing the obstacles; and a retinal implant configured to receive the map of pixels and display the obstacles to a system user by electrically stimulating retinal nerves. The method includes synchronizing captured images and calculating a disparity map between the captured images to detect obstacles and remove a ground plane from processed images. A map of pixels representing the obstacle is transmitted to a retinal implant. Depth information may derive from stereo cameras, a time of flight camera or a structured light camera.
Abstract:
The disclosure features systems for providing information to a user about the user's environment, the system featuring a detection apparatus configured to obtain image information about the environment, where the image information corresponds to information at multiple distances relative to a position of the user within the environment, and an electronic processor configured to obtain focal plane distance information defining a set of one or more distance values relative to the position of the user within the environment, construct one or more confocal images of the environment, from the image information and the set of one or more distance values, wherein each of the one or more confocal images corresponds to a different distance value and comprises a set of pixels, and transform the one or more confocal images to form one or more representative images comprising fewer pixels and a lower dynamic range.