Grant, you can try this prog. It doesn't do a lot on 'whites', but combine it with a red Lexan/perspex screen & you should be O.K.
http://www.adpartnership.net/DarkAdapted/index.html
HTH.
L.
This is the older thread >
(
http://www.iceinspace.com.au/forum/s...ead.php?t=1778)