Developments on the Boston 256-channel retinal implant
Multimedia and Expo Workshops（2013）
Abstract
A hermetic neurostimulator is being developed to restore functional sight to the blind. The latest developments are presented on the Boston 256-channel retinal prosthesis. The device includes a hermetic package made of titanium and alumina, containing an integrated circuit chip with 256 independently addressable current drivers. The prosthesis attaches to the outside scleral wall of the eye and electrically drives a microfabricated thin-film polyimide array of sputtered iridium oxide electrodes. This array is implanted in the subretinal space via a flap in the sclera. The implanted device receives power and stimulation data wirelessly via inductively coupled coils. A circuit to prevent residual electrode voltage and improve safety is being designed for incorporation into future devices. The components of our prosthesis have been tested, and we plan to implant the 256-channel device in animals this year.
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Key words
alumina,artificial organs,biomedical engineering,coils,electrodes,eye,integrated circuits,iridium compounds,thin films,titanium,vision,Boston 256-channel retinal implant,Boston 256-channel retinal prosthesis,alumina,blind,eye,functional sight,hermetic neurostimulator,hermetic package,implanted device,inductively coupled coils,integrated circuit chip,microfabricated thin-film polyimide array,residual electrode voltage,scleral wall,sputtered iridium oxide electrodes,stimulation data,subretinal space,titanium,Biomedical engineering,biomedical electrodes,integrated circuit design,retinal prosthesis
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