"The eye in total darkness will progressively develop a light sensitive pigment called Rhodopsin (a derivative of Vitamin A) which enables greater peripheral vision at night. Persons lacking in Vitamin A will suffer from "night blindness"." This is quoted from Michael Mattiazzo's 'Southern Comets Homepage' website
so we need something that increases Rhodopsin production
http://en.wikipedia.org/wiki/Rhodopsin more vitiamin A?
http://ohioline.osu.edu/hyg-fact/5000/5551.html
Carrots!!!! - lots of them -
also something that increases bloodflow to/in the eyeball - thereby more oxygen transported to the eye? hhhmmmmmm a viagra for the eyeball so to speak - ....Ginkgo Biloba?
http://www.kcweb.com/herb/Ginko.htm i think just being fit and healthy is good enuff maybe?
Alchohol is about the worst possible thing you can take for better vision - believe me i have tried the experiment myself
kearn