We all need to keep in mind that when we are in the woods we are actually in the deer' s living room. When we go out there we are adding another piece of " furniture" to their environment. If another piece of furniture was added to your living room would you notice it? Concealment is important when deer hunting. You have to break up your outline, cover all skin, avoid UV colors and, most importantly, use the existing woods to hide (behind a tree or rock, up in a tree that offers cover).

As far as depth perception goes, the deer know the woods like the back of their hands (hooves). The reason they can jump a barbed wire fence while going full tilt is because they know exactly where the barbed wire is. In fact, they know the best escape route for every given circumstance.

And, a deer cannot see in all directions at the same time. There is only one animal capable of seeing in all directions without moving its head on our continent and that is the cottontail rabbit. A deer has to raise its head to look up. A reaction it will not do unless given a reason to do so (noise or movement). And, they cannot see behind themselves. That' s why they walk with the wind at their back at times - so they can smell what' s behind them.

Just my two cents.