منابع مشابه
Retinal prostheses for the blind.
INTRODUCTION Using artificial means to treat extreme vision impairment has come closer to reality during the past few decades. The goal of this research has been to create an implantable medical device that provides useful vision for those patients who are left with no alternatives. Analogous to the cochlear implants for some forms of hearing loss, these devices could restore useful vision by c...
متن کاملThree-dimensional electrode arrays for retinal prostheses
Three-dimensional electrode geometries were proposed to increase the spatial resolution in retinal prostheses aiming at restoring vision in blind patients. We report here the results from a study in which finite-element modeling was used to design and optimize three-dimensional electrode geometries. Proposed implants exhibit an array of well-like shapes containing stimulating electrodes at thei...
متن کاملSaliency-based image processing for retinal prostheses.
We present a computationally efficient model for detecting salient regions in an image frame. The model when implemented on a portable, wearable system can be used in conjunction with a retinal prosthesis, to identify important objects that a retinal prosthesis patient may not be able to see due to implant limitations. The model is based on an earlier saliency detection model but has a reduced ...
متن کاملMicro-stimulator Design for Retinal Prostheses
SINGH, PRAVEEN RAJAN. Micro-stimulator design for retinal prostheses. (under the direction of Dr. Wentai Liu.) The purpose of this research is to design an integrated circuit (IC) to stimulate retina. The IC is able to generate electrical stimulus specified by medical researchers. The IC is optimize for power and area, as it has to be implanted inside the eye. Specified area goal is to provide ...
متن کاملPixel density and retinal response for series photodiode circuit arrays
Promising new research measuring the properties of series photodiode circuits has shown that they may be suitable for retinal prosthesis [1]. Photodiode arrays, in order to be effective in this capacity, must be pulsed with infrared light (∼900nm) at a much higher intensity than ambient light. The light must be infrared for this particular application because light in the visible spectrum may d...
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ژورنال
عنوان ژورنال: IEEE Transactions on Biomedical Circuits and Systems
سال: 2011
ISSN: 1932-4545,1940-9990
DOI: 10.1109/tbcas.2011.2144980