History

Retinal implants could restore partial vision By: Rachel Ehrenberg may 13, 2012 In lab tests on rat retinas, a photovoltaic chip seconds display images through special gawk. Specialized gape that manoeuver information to solar celllike chips institute in the eyes may wizard day support some blind sight see. The new implants, which have been proven in rat retinas in a dish, would require petty(a) invasive surgery than similar devices now being tried and true and offer a higher-resolution view of the world. The new system, reported online whitethorn 13 in Nature Photonics, still needs spillage before being tested in multitude. But one day it may return partial sight to people suffering from conditions such as retinitis pigmentosa, an inherited disease that put up lead to night blindness and tunnel vision, or macular degeneration, in which sharp central vision is lost but off-base vision remains. In those conditions, vision suffers when light-colored-detecti ng cells at the back of the intramural eye ar damaged, even though the nerve cells that send off visual information to the brain may remain intact. No current treatments can restore vision for such retinene damage, says Lotfi Merabet, an eye specialist at Massachusetts Eye and capitulum in Boston. The new work is certainly very promising, he says.

Developing the implants took many years and many scientists, says study reefer author James Loudin, an electrical engineer at Stanford University. The bluff depend of new technologies that had to be developed its amazing, he says. For starters, there are the goggles. A miniature video photographic camera sits ! on the nosepiece, watching the world. Information from the camera streams to a portable data processor about the size of a smartphone. This ready reckoner processes the video images, which are projected into the eyes by near-infrared lasers on the insides of the goggle lenses. The laser hits slender photovoltaic chips implanted beneath the retinas, which convert the light into electrical current, stimulating nerve cells that send...If you desire to get a full essay, order it on our website: OrderCustomPaper.com

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