Vision greater then 40; what does it really mean in game terms?

[DRG]

40 vision can see 40 hexes, 45 can see 45 hexes and 50 can see 50 hexes. If you have 50 vision and your opponent has 40 you have a 25 % sighting advantage over him and that can make all the difference if it's used under the right conditions. If you are fighting in a city or a jungle in broad daylight it's a waste of points

Don