Visual prosthesis including enhanced receiving and stimulating portion
First Claim
1. A prosthesis for at least partially restoring vision to a user suffering from a photoreceptor degenerative condition, said prosthesis including:
- a secondary coil configured for mounting in the vitreous body of a user'"'"'s eye for responding to a coupled input signal to produce an output signal;
an electrode array configured for implantation in said user'"'"'s eye; and
signal processing circuitry responsive to said output signal for applying an image signal to said electrode array for stimulating retinal cells in said user'"'"'s eye.
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0 Petitions
Accused Products
Abstract
A visual prosthesis including an enhanced receiving and stimulating portion for electrically stimulating retinal tissue to present an apparent image to a user. The prosthesis includes an extraocular camera which responds to a real image to generate a real image signal. The real image signal is coupled, e.g., RF coupling, from an extraocular primary coil to a secondary coil. The secondary coil is preferably affixed within the vitreous body of the user'"'"'s eye positioned for good signal coupling to the primary coil and arranged to be in good thermal contact with the vitreous body which acts as a heat sink. A hermetically sealed housing containing signal processing circuitry is also preferably placed in the vitreous body to assure efficient heat transfer away from the housing. The circuitry is electrically connected to the secondary coil and responds to an output signal therefrom to produce an apparent image signal for driving an electrode array. The electrode array is configured to electrically stimulate the eye'"'"'s retinal tissue to enable a user to perceive an apparent image.
43 Citations
21 Claims
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1. A prosthesis for at least partially restoring vision to a user suffering from a photoreceptor degenerative condition, said prosthesis including:
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a secondary coil configured for mounting in the vitreous body of a user'"'"'s eye for responding to a coupled input signal to produce an output signal;
an electrode array configured for implantation in said user'"'"'s eye; and
signal processing circuitry responsive to said output signal for applying an image signal to said electrode array for stimulating retinal cells in said user'"'"'s eye. - View Dependent Claims (2, 3, 4, 5)
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6. In combination with a user'"'"'s eye characterized by a lens and a sclera wall enclosing a vitreous chamber containing a vitreous body, and including a retina supported adjacent to said vitreous body proximate to the intraocular side of said sclera wall, a visual prosthesis comprising:
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a secondary coil for responding to input signal energy to produce an output signal, said coil being mounted in said vitreous chamber in thermal contact with said vitreous body;
an array of electrodes implanted proximate to said retina; and
signal processing circuitry coupled to said secondary coil and responsive to said output signal for applying an image signal to said array of electrodes for electrically stimulating said retina to present an apparent image to said user. - View Dependent Claims (7, 8, 9, 10)
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11. A visual prosthesis for at least partially restoring vision to a user suffering from a photoceptor degenerative condition, said prosthesis comprising:
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an image acquiring portion for producing a real image signal representative of a real image; and
a stimulating portion for electrically stimulating the user'"'"'s retina to present an apparent image to the user;
said stimulating portion including;
an array of electrodes mounted in the user'"'"'s eye proximate to said retina and electrically connected thereto; and
a protective housing containing signal processing circuitry responsive to said real image signal for applying an apparent image signal to said electrode array for stimulating said retina to present said apparent image; and
whereinsaid housing is mounted in the vitreous body of the user'"'"'s eye in good thermal contact therewith. - View Dependent Claims (12, 13, 14, 15, 17, 18, 19)
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16. A visual prosthesis for at least partially restoring vision to a user suffering from a photoceptor degenerative condition, said prosthesis comprising:
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an image acquiring portion including an extraocular primary coil for producing a real image signal representative of a real image; and
a stimulating portion for electrically stimulating the user'"'"'s retina to present an apparent image to the user;
said stimulating portion including;
a secondary coil coupled to said primary coil for producing an output signal in response to said real image signal;
an array of electrodes mounted in the user'"'"'s eye proximate to said retina and electrically connected thereto; and
a protective housing containing signal processing circuitry responsive to said output signal for applying an apparent image signal to said electrode array for stimulating said retina to present said apparent image; and
whereinsaid housing is mounted adjacent to the extraocular side of the user'"'"'s sclera wall.
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20. A method for implanting a visual prosthesis in the eye of a user including:
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fixing a secondary coil in the vitreous chamber of the user'"'"'s eye in thermal contact with the vitreous body in the chamber;
mounting a protective housing containing signal processing circuitry in close proximity to said secondary coil;
connecting an electrode array to the user'"'"'s retina; and
electrically connecting said signal processing circuitry to said secondary coil and said electrode array.
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21. A method of deploying a visual prosthesis for a user to at least partially restore vision comprising the steps of:
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generating a real image signal representative of a real image;
mounting a protective housing containing signal processing circuitry in the vitreous body of a user'"'"'s eye in good thermal contact therewith;
coupling said real image signal to said signal processing circuitry to produce an apparent image signal;
connecting an electrode array to the user'"'"'s retina; and
applying said apparent image signal to said electrode array.
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Specification