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Now researchers are aiming to replicate this technique for interconnecting imaging elements in eEyes. Today's eEyes just sink metallic electrodes—one for each pixel—into the ganglia behind the eye, which then depends on the plasticity of the visual cortex in the brain to decipher the output from these new pixels—even though they do not match the normal topology of the biological retina. However, new research efforts are developing a technique that starts with a metallic seed that then grows all the repeated branching structures that in turn mate to the optic nerve behind the eye, thereby delivering to the brain the same kind of signals as retinal neurons.