I like the "example" of how our vision appears (click on the pic about 1/2 way down the page) in this link:
http://en.wikipedia.org/wiki/Optic_neuritis
This link is hard to read because of the background, but has reliable information:
http://www.jandoerffel.de/on.htm
Cherie
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I am not a Neurologist, Physician, Nurse, or Hairdresser ... but I have learned that it is not such a great idea to give oneself a haircut after three margaritas
.