What Is A Retinal Prosthesis?
A retinal prosthesis is a biomedical implant intended to partially restore useful vision to people who have lost their sight due to a degenerative retinal disease such as retinitis pigmentosa (RP) that severely damages the photoreceptors in the eye.
What Is The Argus® II Retinal Prosthesis System?
The Argus II Retinal Prosthesis System (“Argus II”) is intended to provide electrical stimulation of the retina to induce visual perception in blind individuals.
Who Might Benefit?
Argus II currently provides some useful vision to patients with severe to profound vision loss due to outer retinal degeneration, such as retinitis pigmentosa (RP) .
Additional exclusion criteria may apply. Consult your physician.
What Do You See With Argus II?
Argus II restores “vision” that is not the same as the natural vision experienced by the patient prior to blindness. It may best be described as “somewhat pixelized” vision composed of spots of light which, in an ideal case, cover the central 20° visual field. This can be compared to a 30 cm ruler held out at arm’s length.
Typically, time is required to learn to interpret the images produced by the system and results are variable between patients. Some patients are able to easily discern forms, identify large written characters, and locate light sources, while others are not able to interpret spatial information about the visual scene with their system. In the study, patients were consistently better at performing orientation and mobility tasks using Argus II.
*NOTE: not all patients could perform all of these tasks
Is A Surgical Procedure Required?
Yes, a surgical procedure is used to implant Argus II. The surgery can typically be completed within 4 hours and requires general anaesthesia. A one-night hospital stay may be required. Pre- and post-operative medication will be defined as necessary by the physician. Support from family or friends is recommended (but not required) for the post-operative follow-up.
Are There Any Risks?
As with any surgical procedure or implanted device, there are risks. Please consult your physician directly.
What Happens After Surgery?
Following implantation surgery, patients return to the clinic several times over the next few months for medical follow-up, to have their system customized, and to receive training on how to use the system. Once this fitting and training is completed, the patients may begin to use the device at home. At this point, patients may elect to receive rehabilitation sessions conducted by a low-vision therapist. These sessions are intended to teach patients how to interpret and use their new visual skills in their daily lives.
How Do I Learn More?
For more information about the system: Argus II