I think the night vision analogy is not good. Assuming the eyes are healthy and normal, their pupils must simply open to admit more light when the individual leaves the lighted room for the moonless forest. This is a well known response of the eye(s) to a change in ambient lighting.

The Stereopile Test CD (#3, I believe) has JA walking from the back of a church up toward a pair of stereo mikes located at the front pews as he hits a cow bell. The intended listener is "midway in the pews". If I play this cow bell test over a stereo pair of coned speakers, JA only becomes louder as he "supposedly walks", but he never seems to move toward me. If I play this cow bell test over my (stereo pair) of Futterman-driven Tympani, JA seems to move toward me as he becomes louder. Of course, if JA were to continue walking past the mikes at the front pews and toward the front of the church, I would probably perceive him as turning around and walking back to the far rear of the church. Now mind you, I use RS Gold I/C and 12 Ga zip speaker wires. Since I hear the spatial effect as JA apparently intended, it would seem that I have no need to buy exotic (read: expensive) wires. But I only get the spatial effect with the Tympani and not with the coned speakers I tried. I will have to try it with the Magnepans now in my bedroom, even tho they are powered with a Class A SS amp.