retina :

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re tuh nuh

  • n  the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve

  • A section of the retina (the eye's inner nerve coat) is torn loose from the choroid (the spongy surrounding membrane that normally supplies the retina's nourishment).
  • An electron micrograph of a human retina shows the crater-like macula, with the fovea at its center.
  • Once surgically placed in the eye, Chow's Artificial Silicon Retina (ASR)--a computer chip about the size of a pinhead takes on the job of the retina's damaged photoreceptors.
News & Articles


  • Steve Jobs in ITWeb
    iPhone 4 is the biggest leap since the original iPhone,said Jobs. "FaceTime video calling sets a new standard for mobile communication, and our new Retina display is the highest resolution display ever in a phone, with text looking like it...

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