Method for increasing the resolution and decreasing the...

Details Method for increasing the resolution and decreasing the... Method for increasing the resolution and decreasing the...

2006-10-31

2006-10-31

Getzow, Scott M. (Department: 3762)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

Reexamination Certificate

active

07130693

ABSTRACT:
A method for increasing a resolution and decreasing a power dissipation in an epiretinal implant device is described. The method includes positioning extendable microprobes to achieve mechanical contact with an anterior surface of the retina when the epiretinal implant device is activated. A level of pressure of the contact and an amount of current to be applied for stimulation of ganglion cells may be determined for optimum power consumption and stimulation. The contact of the microprobes with the retina, which may include MEMS, and an additional effect of mechanical stimulation enables reduction of current dissipation. Reduced current allows employment of more microprobes increasing resolution. The level of contact pressure and applied current may be dynamically re-determined based on changing ambient light conditions, and the like. A random duty-cycling of the mechanical contact and applied current may provide further reduction of current dissipation.

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U.S. Appl. No. 10/218,836, filed Oct. 28, 2002, Mohan Yegnashankaran.
USC News Service. Oct. 1, 2003. “Center of Attention.” 4pp.
US Santa Cruz Currents Online. Oct. 6, 2003. “New Engineering Center Focuses on Implantable Prosthetics.” 3pp.
The National Science Foundation, Division of Engineering Education & Centers. “Program Areas.” 5pp.

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