CA2621123A1 - Visual prothesis - Google Patents
Visual prothesis Download PDFInfo
- Publication number
- CA2621123A1 CA2621123A1 CA002621123A CA2621123A CA2621123A1 CA 2621123 A1 CA2621123 A1 CA 2621123A1 CA 002621123 A CA002621123 A CA 002621123A CA 2621123 A CA2621123 A CA 2621123A CA 2621123 A1 CA2621123 A1 CA 2621123A1
- Authority
- CA
- Canada
- Prior art keywords
- visual
- circuit block
- image
- visual prosthesis
- visual signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000000007 visual effect Effects 0.000 title claims abstract 20
- 230000000638 stimulation Effects 0.000 claims abstract 8
- 230000002207 retinal effect Effects 0.000 claims abstract 7
- 210000003786 sclera Anatomy 0.000 claims 2
- 206010034962 Photopsia Diseases 0.000 claims 1
- 229910000065 phosphene Inorganic materials 0.000 claims 1
- 230000004936 stimulating effect Effects 0.000 claims 1
- 210000001525 retina Anatomy 0.000 abstract 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 abstract 1
Landscapes
- Prostheses (AREA)
Abstract
A visual prosthesis comprises a camera for perceiving a visual image and generating a visual signal output, retinal tissue stimulation circuitry adapted to be operatively attached to the user's retina, and wireless communication circuitry for transmitting the visual signal output to the retinal tissue stimulation circuitry within the eye. To generate the visual signal output the camera converts a visual image to electrical impulses which are sampled to selecting an image at a given point in time. The sampled image signal is then encoded to allow a pixelized display of it. This signal then is used to modulate a radio frequency carrier signal. A tuned coil pair having a primary and a secondary coil are used to transmit and receive the RF
modulated visual signal which is then demodulated within the eye. The retinal stimulation circuitry includes a decoder for decoding the visual signal output into a plurality of individual stimulation control signals which are used by current generation circuitry to generate stimulation current signals to be used by an electrode array having a plurality of electrodes forming a matrix. The intraocular components are powered from energy extracted from the transmitted visual signal. The electrode array is attached to the retina via tacks, magnets, or adhesive.
modulated visual signal which is then demodulated within the eye. The retinal stimulation circuitry includes a decoder for decoding the visual signal output into a plurality of individual stimulation control signals which are used by current generation circuitry to generate stimulation current signals to be used by an electrode array having a plurality of electrodes forming a matrix. The intraocular components are powered from energy extracted from the transmitted visual signal. The electrode array is attached to the retina via tacks, magnets, or adhesive.
Claims (8)
1. A visual prosthesis, comprising:
(a) retinal tissue stimulation means comprising an electrode array capable of stimulating retinal cells to produce phosphenes in a pattern to stimulate vision; and (b) a circuit block in a hermetically-sealed package and coupled to the retinal tissue stimulation means.
(a) retinal tissue stimulation means comprising an electrode array capable of stimulating retinal cells to produce phosphenes in a pattern to stimulate vision; and (b) a circuit block in a hermetically-sealed package and coupled to the retinal tissue stimulation means.
2. A visual prosthesis as defined in claim 1, wherein the circuit block is suitable to be located in the body of the user outside the wall of a sclera.
3. A visual prosthesis as defined in claim 1 or 2, wherein a cable or wire are coupled to the circuit block.
4. A visual prosthesis as defined in claim 3, wherein the cable or the wire coupled to the circuit block pierces the sclera.
5. A visual prosthesis as defined in claim 3, wherein the cable couples the retinal tissue stimulation means to the circuit block.
6. A visual prosthesis as defined in claim 3, wherein the wire couples the circuit block to a secondary coil.
7. A visual prosthesis as defined in claim 6, wherein the circuit block is powered by a dc output produced by a rectifier means which rectifies a radio-frequency carrier signal received by the secondary coil.
8. A visual prosthesis as defined in any one of claims 1 to 7, further comprising means for perceiving a visual image comprising a camera for converting a visual image to electrical impulses which are transmitted to the circuit block.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/041,933 US5935155A (en) | 1998-03-13 | 1998-03-13 | Visual prosthesis and method of using same |
| US09/041,933 | 1998-03-13 | ||
| CA2323550A CA2323550C (en) | 1998-03-13 | 1999-03-11 | Visual prosthesis |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2323550A Division CA2323550C (en) | 1998-03-13 | 1999-03-11 | Visual prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2621123A1 true CA2621123A1 (en) | 1999-09-16 |
| CA2621123C CA2621123C (en) | 2012-08-21 |
Family
ID=39473543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2621123A Expired - Lifetime CA2621123C (en) | 1998-03-13 | 1999-03-11 | Visual prothesis |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2621123C (en) |
-
1999
- 1999-03-11 CA CA2621123A patent/CA2621123C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2621123C (en) | 2012-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20190311 |