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Echolocation
#1
I know this is not really 'vision' improvement but this thing helps the blind a lot.
some readings:
https://secure.wikimedia.org/wikipedia/e...holocation
http://www.mensjournal.com/the-blind-man...see/print/
http://www.benunderwood.com/echolocation.html
http://learnecholocation.blogspot.com/


Anyone have tried this? Please share
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#2
http://www.youtube.com/watch?v=vpxEmD0gu0Q
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