RetinalImplant
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Subretinal implant uses light instead of batteries, shows promise in initial testing
There's been significant progress in bringing sight to the blind in recent years, and this looks set to continue that miraculous trend. Scientists at Stanford University have invented a subretinal photodiode implant for people who have lost their vision due to degenerative retinal diseases. Existing tech involves batteries and wires, but the new implant works without such crude appendages. Instead, it's activated by near-infrared beams projected by a camera that's mounted on glasses worn by the patient and can record what the patient sees. The beams then stimulate the optic nerve to allow light perception, motion detection and even basic shape awareness. It hasn't actually been tested with humans just yet, but the first few rodents volunteers have yet to lodge a single complaint.
Subretinal implant successfully tested on humans, makes blind narrowly see
How many scientists does it take to properly install a lightbulb? When that lightbulb is an implant that stimulates retinal photoreceptors to restore one's sight, quite a few -- even if they disagree whether said implant should be placed on top of the retina (requiring glasses to supply power and video feed) or underneath, using photocells to channel natural sunlight. Now, a German firm dubbed Retina Implant has scored a big win for the subretinal solution with a three-millimeter, 1,500 pixel microchip that gives patients a 12 degree field of view. Conducting human trials with 11 patients suffering from retinitis pigmentosa, the company successfully performed operations on seven, with one even managing to distinguish between similar objects (knife, fork, spoon) and perform very basic reading. Though usual disclaimers apply -- the tech is still a long way off, it only works on folks who've slowly lost their vision, etc. -- this seems like a step in the right direction, and at least one man now knows which direction that is.
MIT researchers tout progress with retinal implant - yes, it comes with a visor
As impressive as that tooth-eye implant was, we're guessing most folks had something more like this in mind when they considered the future of sight restoration. While it's still a bit early in development, and has yet to actually be implanted in anyone, this new retinal implant certainly seems to have the researchers at MIT excited, who say that tests with blind patients could begin within the next three years. The basic idea behind it was apparently inspired by the cochlear implants that have proven successful in restoring people's hearing, although in this case the implant works by electrically stimulating damaged nerve cells that would ordinarily send visual signals from the retina to the brain. According to the researchers, however, the system would only work on folks that have lost their sight due due retinitis pigmentosa or age-related macular degeneration, and it wouldn't restore complete sight, but could let them see enough to find their way through a room or walk down a sidewalk (which is certainly no small feat). They'll also have to wear a special set of glasses (or visor, if you prefer), which will not only wirelessly send images to the implant, but keep it powered wirelessly through a set of coils.[Via The Register]
