Craniofacial prosthesis - Wikipedia
Eustachian tube prosthesis Edit.
,Professor and Researcher at at the Ecole Polytechnique de Montreal, has beenworking on a visual prosthesis to be implanted into the humancortex. The basic principle of Dr. Sawan’s technology consists instimulating the visual cortex by implanting a silicium microchip ona network of electrodes made of biocompatible materials and inwhich each electrode injects a stimulating electrical current inorder to provoke a series of luminous points to appear (an array ofpixels) in the field of vision of the sightless person. This systemis composed of two distinct parts: the implant and an externalcontroller.
Girl, 14, with disfigured ear fitted ..
Daniel Palanker and his group at Stanford University havedeveloped an optoelectronic system for visual prosthesis that includes a subretinal photodiode array and an infrared imageprojection system mounted on video goggles. Information from thevideo camera is processed in a pocket PC and displayed on pulsednear-infrared (IR, 850-900 nm) video goggles. IR image isprojected onto the retina via natural eye optics, and activatesphotodiodes in the subretinal implant that convert light intopulsed bi-phasic electric current in each pixel. Charge injectioncan be further increased using a common bias voltage provided by aradiofrequency-driven implantable power supply Close proximity between electrodes and neural cells necessary forhigh resolution stimulation can be achieved utilizing effect ofretinal migration.