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higher number might provide enough resolution for reading. (Dr. Mech said a maximum
electrode number would eventually be reached because if they are packed too densely, retinal
tissue could be burned.)
"Every subject has received some sort of visual input," he said. "There are people who aren't
extremely impressed with the results, and other people who are." Second Sight is studying what
affects results, including whether practice or disease characteristics influence the brain's ability
to relearn how to process visual signals.
People choose when to use the device by turning their camera on. Dean Lloyd, 68, a Palo Alto,
Calif., lawyer, was "pretty disappointed" when he started in 2007, but since his implant was
adjusted so more electrodes responded, is "a lot more excited about it," he said. He uses it
constantly, seeing "borders and boundaries" and flashes from highly reflective objects, like glass,
water or eyes.
With Ms
annaabi.ee 
