Academic journal article Journal of Visual Impairment & Blindness

Retinal Prosthesis Study Recruitment Partially Completed

Academic journal article Journal of Visual Impairment & Blindness

Retinal Prosthesis Study Recruitment Partially Completed

Article excerpt

The University of Southern California and Second Sight Medical Products, a developer of retinal prostheses for treating blindness, recently announced that they have completed enrollment of the first phase of a three-year clinical Investigational Device Exemption trial of the Argus II Retinal Prosthesis System in the United States; enrollment for the study in Europe and Mexico continues. The Argus II is the second generation of an electronic retinal implant designed for the treatment of retinitis pigmentosa, an inherited eye disease that affects the retina and causes visual impairment. The Argus II implant consists of an array of 60 electrodes that are attached to the retina. These electrodes conduct information acquired from an external camera to the retina to provide a rudimentary form of sight to implanted subjects. The development of this technology was supported by the NEI and the U.S. Department of Energy's Office of Science Artificial Retina Project, which is helping to advance the implant's design and construction.

Ten subjects in the United States have been recruited for the Phase I Argus II trial. Robert Greenberg, president and chief executive officer of Second Sight, who has worked in the field of retinal prostheses for more than 15 years, said,

   Although it is too early to comment on the
   clinical data, each device continues to
   function as expected, and all participants
   are using their systems at home daily.

The U.S. trials are currently being conducted at four ophthalmic centers throughout the country, including Doheny Eye Institute at the University of Southern California, Wilmer Eye Institute at Johns Hopkins University in Maryland, the University of California at San Francisco, and the Retina Foundation of the Southwest in Texas. …

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