Slashdot Mirror

← Back to Stories (view on slashdot.org)

Bionic Eye Lets Blind Woman Experience Vision

Posted by samzenpus on from the red-computer-eyes dept.

An anonymous reader writes "Australian researchers implanted a bionic eye with 24 electrodes in Ms Dianne Ashworth, a 54-year-old who had limited vision due to a inherited condition called retinitis pigmentosa. The implant has allowed her to see flashes of light and shapes when researchers deliver electrical pulses to the device. From the article: 'This early prototype consists of a retinal implant with 24 electrodes. A small lead wire extends from the back of the eye to a connector behind the ear. An external system is connected to this unit in the laboratory, allowing researchers to stimulate the implant in a controlled manner in order to study the flashes of light. Feedback from Ms Ashworth will allow researchers to develop a vision processor so that images can be built using flashes of light. This early prototype does not incorporate an external camera – yet. This is planned for the next stage of development and testing.'"

3 of 52 comments (clear)

  1. Not vision by BWJones · · Score: 5, Informative

    Note: This is *NOT* vision. This is an uncoordinated stimulation of neurons that is no more vision than poking your eye and seeing flashes of light or knocking yourself on the back of the head and seeing stars. Vision is a far more complicated matter and these investigators that are promoting this bionic chip have ignored or are ignorant of over a decade of research that shows the neurons in the eye change their wiring in response to retinal degenerative disease. When the wiring in the retina changes, it is no longer able to mediate normal retinal signaling...

    Yes, I am a vision scientist.

    --
    Visit Jonesblog and say hello.
    1. Re:Not vision by BWJones · · Score: 4, Informative

      What they are claiming is that the bionic implant will work in a degenerate retina. The substrate circuitry has changed. No chance of it transducing vision... They are either going to have to intervene at an earlier time point (much earlier than most folks realize) or bypass the retina or reconstruct the retina. There is more biology at play here than a simple engineering project.

      --
      Visit Jonesblog and say hello.
    2. Re:Not vision by femto · · Score: 4, Informative

      The background to this project is that a newly elected government held a big "vox poluli" talk fest called 2020, which was to lay out a "big vision" for Australia. A result was the announcement of $50 million funding for a bionic eye project. It's entirely possible that there is an element of "gung ho" about it in that a large chunk of money was laid down for a project that made politicians look good and was easy for the public to understand.

      Having said that, there are some pretty smart people involved. As an Australian taxpayer, I'd hope that they are aware for the problems you raise and, given the grandness of the project, would plan on addressing such tough, tough problems. Given your area of expertise, maybe you should contact them? There might be some pretty exciting work to be done in collaboration?