I'm way out of my depth

[Wilbur07]

If neurotransmitters are merely chemical vectors, how come we can see and 
hear close to analog images and sounds?  [hint, hint, context, hint, hint, 
bfd]
If we can get the brain to fill in for the device [no need, the filling in 
should be done by the brain], erm if we can get a modicum of detail then 
competent sight is possible, in any spectra imaginable [Steve Austin].