Artificial retina device
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United States of America Patent
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Jun 18, 1991
Issued Date -
N/A
app pub date -
Jul 6, 1990
filing date -
Aug 8, 1989
priority date (Note) -
Expired
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Abstract
A silicon chip device composed of a large array of densely packed microphotodiodes is implanted between the inner and outer retina layers, in patients with vision-deficient eyes suffering from retinal dysfunction, to allow for useful formed vision. The photoactive surface of each photodiode, with its silicon deposited or etched electrode, point towards the incident light. The device produces an amplitude-modulated current to stimulate the inner retinal layer. The device is intrinsically inert due to its doped silicon substrate nature.
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