SYSTEMS, IMPLANTABLE DEVICES AND METHODS FOR VISION RELATED STIMULATION
Implantable medical devices for use in or on the eye. An implantable device may have at least one electrode thereon for issuing therapy, such as via electrical current or voltage, while implanted in or on the eye, for the treatment of one or more of macular degeneration, glaucoma, presbyopia, or other condition or disease of the eye. The implantable device may comprise a transducer for receiving power from an external device that may be worn on the patient using any of optical, inductive, mechanical or radiated energy. An example includes an implantable device for placement on the retina which has a gap or opening to place electrodes near the maculae without covering the fovea. Other examples may target other portions of the eye anatomy.
1 - 19 . (canceled)
20 . An implantable system for treatment of an eye disease comprising:
an implantable device having at least one electrode thereon, a control circuit, and an implantable transducer for receiving a power signal, the implantable device sized and shaped for placement in, on or adjacent to the eye such that issuance of an electric signal with the electrodes has an effect on cells of the eye; and
an external device having an external transducer for issuing a power signal to the implantable transducer;
wherein the control circuit of the implantable device is configured to receive power from the implantable transducer and route electrical signals to the electrodes for treatment of a disease of the eye; and
wherein the power signal generated by the external device is unrelated to any visual appearance of an object.
21 . The system of claim 20 , wherein the implantable transducer is an antenna adapted to receive an RF signal and convert at least some of the RF signal into electrical power, and the external transducer is an antenna configured to generate an RF signal.
22 . The system of claim 20 , wherein:
the implantable transducer and external transducer are adapted, respectively, to receive and transmit a light signal;
the light signal has an infrared wavelength; and
the implantable transducer and external transducer are configured to operate using the infrared wavelength.
23 . The system of claim 20 , wherein the implantable transducer and external transducer are adapted, respectively, to receive and transmit an ultrasound signal.
24 . The system of claim 20 , wherein:
the implantable transducer is an inductive coil;
the external transducer is an inductive coil;
the external transducer is configured to generate an electromagnetic signal; and
the implantable transducer is configured to receive the electromagnetic signal and generate electrical power from at least a portion thereof.
25 . The system of claim 20 , wherein the implantable transducer comprises at least first and second transducing units that are separately activatable, and the control circuit is configured to selectively activate the electrodes depending on which transducing unit is activated.
26 . The system of claim 20 , wherein the signal generated by the external device comprises both data and power, and the implantable device further comprises a demodulation circuit to extract data from the signal generated by the external device.
27 . The system of claim 20 , wherein:
the eye disease is macular degeneration; and
the implantable device comprises one or more retinal tacks for securing the implantable device to the retina of a patient.
28 . The system of claim 27 , wherein the implantable device defines an opening surrounded by the electrodes, the opening sized and shaped to avoid blocking light entering the eye from impinging on a majority of the macula when the device is implanted at the retina of the patient.
29 . The system of claim 28 wherein the opening has a diameter in the range of about 1.5 to 8 millimeters.
30 . The system of claim 20 , wherein the disease is presbyopia, and the electrical signals are configured for affecting the ciliary muscle.
31 . The system of claim 20 , wherein the control circuit is programmable to define an output pattern using the electrodes as anodes and cathodes in a programmable sequence.
32 . A method of treating a patient having an eye disease comprising implanting an implantable device in a position on the retina and over or in proximity with the macula such that the fovea centralis is not covered by the implantable device, the implantable device having a plurality of electrodes thereon, wherein the implanting step is performed to place the electrodes in contact with the retina.
33 . The method of claim 32 wherein the implantable device comprises a plurality of electrodes that surround an opening, wherein the method of implantation includes placing the opening approximately over the fovea.
34 . The method of claim 33 wherein the opening has a diameter in the range of about 1.5 to 8 millimeters.
35 . The method of claim 33 further comprising delivering electrical outputs between the electrodes to stimulate neural activity in the maculae and/or fovea.
36 . The method of claim 35 wherein the electrical outputs are of sufficient power to cause the patient to experience phosphenes.
37 . The method of claim 35 , further comprising transmitting power to the implantable device from an external device, and the implantable device using the transmitted power to generate the electrical outputs.
38 . A method of treating a disease of the eye comprising:
with an external device, issuing a power signal in the vicinity of or directed into the eye;
with an internal device located inside the eye, receiving the power signal and converting it to an electrical output; and
with the internal device, issuing, through electrodes of the internal device, electrical outputs to retinal cells to stimulate said retinal cells;
wherein the electrical outputs are unrelated to any image or scene.
39 . The method of claim 28 , wherein the internal device is attached to the retina in the vicinity of but not covering the fovea.