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Japanese
Projects for Artificial Vision |
At the first stage of our project, we investigated the
effects of implanting the stimulating electrodes epiretinally
and subretinally.
At the second stage, we have developed our original and
practical method of Suprachoroidal-Transretinal Stimulation
(STS) for stimulating the retina. Now, we are studying
the safety and effectiveness of this approach for clinical
application. The STS system consists of a CCD camera,
Image Processor, Pulse Generator, Receiver, and Electrodes
implanted in a scleral pocket or the suprachoroidal space.
The energy is supplied by radiofrequency waves. The reference
electrode is implanted in the vitreous cavity so as to
stimulate the retina effectively by transretinal currents.
The advantage of this method is that the surgical treatment
is less invasive, and a wide visual field can be obtained.
The spatial resolution and the threshold currents required
by this method are to be determined. To improve the spatial
resolution, we are developing flexible electrodes using
IC chips. |
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Medical
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Engineering
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