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Patients get Solar Implants in Eyes

Ben Sullivan writes "As reported at Science Blog, ophthalmologists have implanted Artificial Silicon Retina microchips in the eyes of five patients to treat vision loss caused by retinitis pigmentosa. The implant is a 2mm chip that contains about 5,000 microscopic solar cells that convert light into electrical impulses. Already some patients have experienced improvements such as not bumping into objects around the house, and being able to read the time on a clock."

12 of 286 comments (clear)

  1. Quality by sanosuke001 · · Score: 3, Interesting

    How do the doctors know what kinds of electrical signals the brain needs in order to see what they;re supposed to see?

    Also, if they do figure out how to make this like our vision, don't solar cells "see" in higher wavelengths than our eyes do? Wouldn't people not see blue and purple but instead get UV and the like?

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    -SaNo
    1. Re:Quality by roman_mir · · Score: 4, Interesting

      They don't have to know anything like that. All they need to do is to provide voltage that is within parameters of the cell resistance (just enough but not to burn the cells.) The brain takes care of mapping electrical signals to the visual part of cortex. I suppose this will only produce shadows of gray and not color. To produce color they will have to do more than a single electrical signal, but for shadows of one color (gray?) voltage difference will be enough.

      I wonder what is the life of the solar cells? Will they have to be replaced time to time?

  2. Orson Scott Card by 1010011010 · · Score: 4, Interesting

    Sounds like we're on the road to the artificial eye one of OSC's characters had in the Ender's Game series. One of its cool features was that you could pull pictures and video off of it, as well as see through it. It was an in-skull camera.

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  3. Improvements by Harald74 · · Score: 3, Interesting

    Night vision, anyone?

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  4. Stevie Wonder... by cswiii · · Score: 4, Interesting

    Isn't this what Stevie Wonder has, w/r/t the pigmentosa? Furthermore, I seem to remember them talking about the possibility a couple of years ago that he would be a candidate for something similar, with a microchip.

    I'd imagine that his condition has degenerated far too much along to be aided by this, but if I recall correctly, they nonetheless said he might be a candidate for something similar. I don't think they ended up using him, however.

  5. in time.. by hielenlikker · · Score: 4, Interesting

    i wonder what will be first: - a human of whom all parts are subsituted by technology - a robot which will have a real human soul

  6. Bionics by ArsonSmith · · Score: 3, Interesting

    When will we get the ability to enhance current senses and strength. This kind of tech is always the most fun.

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    Paying taxes to buy civilization is like paying a hooker to buy love.
  7. Incrediably important by UlfGabe · · Score: 5, Interesting

    This development is very very^H^H^H^H^H important. I have been reading the material on this stuff and it looks as if it is possible to give people devoid of sight, some sight back.

    THE REAL treasure here is knowing the brain can adapt. Think about it, they were deprived of sight, and then their brain was able to REORGANIZE itself to understand totally FOREIGN signals and use them as input.

    It demonstrates how our wetware is more adaptable than any hardware.

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  8. I'm excited! by plalonde2 · · Score: 4, Interesting
    As someone who has been losing central vision from a pesky bleeding blood vessel under my retina, this news really excites me.

    On friday I'm going in for essentially the same surgery, only instead of inserting a chip, they try to deal with the bad blood vessel. Then, after a week of lying face down, and a month of no flying (which kills my easy work commute and turns it into a 5 hour ordeal), I get to find out how much damage was done to my retinal pigments by the blood that has been pooling there for half a year.

    Damage that *used* to be un-repairable. With this technology now deployed there's a good chance it will be routine for people like me in 10-15 years.

    And given that the likelyhood of diagnosis in the second (currently good) eye is about 1 in 50 per year from now on, the stats give me 15-25 years before I start worrying about getting an artificial retina.

    Hooray for bionics!

  9. The brain learns by Anonymous Coward · · Score: 4, Interesting

    When surgeons re-attach a severed limb they don't worry about getting all the neurons connected correctly. They connect them randomly, and the brain learns the new mapping.

    Physically therapy takes care of the learning, but it is a side effect, the brain is good at learning new mappings. The body generally has many more problems making everything work, in ways that are not related to incorrectly attached neurons.

    1. Re:The brain learns by FirienFirien · · Score: 4, Interesting

      In case anyone isn't sure whether the eyes are too complex for the brain to learn, remember that they did experiments with putting inverting glasses on people, so they saw everything upside down.

      I think it took about half a week for people's brains to respond 'correctly' to a given situation (e.g. not bumping into things).

      When the goggles were removed, the test subjects saw things upside down. The brain had adjusted sufficiently to seeing upside down that reverting to the standard way up confused it.

      There was a comment from one of the users that he did occasionally still get confused, which implies that the wiring in these photodetectors may occasionally confuse the user slightly as the brain tries to remember which signal protocol it's using, but the main point is the speed of learning seen in the experiment.

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  10. MPAA owns your eyes by tepples · · Score: 5, Interesting

    One of [the] cool features [of a science-fictional eye implant that this product resembles] was that you could pull pictures and video off of it, as well as see through it. It was an in-skull camera.

    Watch people with implants be banned from entering movie theaters.