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Second Sight Implant: Positive Results Reported in the Study

May 3rd, 2005 Medgadget Editors Ophthalmology

retinal implant by Second SightThe latest developments in Second Sight implant testing come from the University of Southern California:

According to Mark Humayun, professor of ophthalmology at the Keck School of Medicine and the lead investigator on the project, all six of the previously blind patients have been able to detect light, identify objects in their environment, and even perceive motion after implantation with the epiretinal device.
Data collected as of November of 2004 showed that the six patients-who had been implanted with a single prosthesis in their “worse eye” for between 5 and 33 months-were able to “localize the position of, or count the number of, high contrast objects with 74 to 99 percent accuracy,” Humayun says. In addition, they could discriminate simple shapes-i.e., figure out the spatial orientation of a bar or the capital letter L-with 61 to 80 percent accuracy.
The researchers also noted that when there is no electricity running through the device, the subjects do not show any improvement in perceptual acuity, “suggesting that electrical stimulation did not improve the health or function of the retina.”
Thus far, participants in the study have been people with little or no sight perception due to the degenerative eye disease retinitis pigmentosa ( RP ).

The press release…
Flashback: Diamond Coating for Second Sight Implant…
More at Second Sight Medical Products…

Medgadget Editors

Medical technologies transform the world! Join us and see the progress in real time. At Medgadget, we report the latest technology news, interview leaders in the field, and file dispatches from medical events around the world since 2004.

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