RetinaImplant
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Microchip implant lets blind patients see shapes, skip the prosthetic
An eye-implanted chip from Retina Implant has restored patients' ability to discern light during its latest trial, according to German researchers. The device works in a similar fashion to the newly FDA-approved Argus II retinal prosthesis to return limited vision in patients with photoreceptor cell diseases like retinitis pigmentosa. Unlike that system, however, light is picked up via 1,500 pixels on a retinal implant instead of an eyeglass-mounted camera. The signal is boosted by a coil implanted in skin behind the ear and sent back to so-called bipolar cells still active on the retina, which in turn send an image to the brain through regular neural circuits. A small battery mounted behind the ear -- the only external sign of the device -- contains controls for brightness and contrast. The recent trial let 8 out of 9 patients see in varying degrees, with three in the study even able to read letters and see the faces of family members. Given that the Argus II finally crossed the FDA's bionic eye barrier, hopefully we won't have to wait nearly as long for research like this to become a product.
Second Sight retinal prosthesis cleared for sale in Europe, a better one already in development
We'd bother with the obvious, but there's no sense in acting exasperated that this thing is finally shipping -- let's just be glad it didn't take a day longer, shall we? Second Sight, a California-based company aiming to help those with degenerative eye disease by way of technology, has finally seen its flagship product approved for "clinical and commercial use" in Europe. The product is the Argus II, and for all intents and purposes, it's a retinal prosthesis (read: implant) that can at least partially restore lost vision. It works a little like this: patients don the camera-laden glasses, where signals are grabbed and fed wirelessly to a chip implanted near ones retina. The information is beamed to around 60 electrodes that "stimulate retinal cells, producing light in a patient's view." According to Technology Review, "the process works for people with retinitis pigmentosa because the disease damages only the light-sensing photoreceptors, leaving the remaining retinal cells healthy." For now, the $115,000 device will only be available through a smattering of clinics in Switzerland, France and the UK. If all goes well, it'll be actively seeking FDA approval next year for use in the US of A, and a version with way more electrodes shouldn't be too far behind.
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.
