IDTANDY
08-21-2012, 04:38 AM
I found this interesting.Used to teach this to Aircrews.
http://www.arizonamilitia.com/manuals/Dark%20Adaptation%20And%20Natural%20Night%20Vision .pdf
http://www.arizonamilitia.com/manuals/Dark%20Adaptation%20And%20Natural%20Night%20Vision .pdf