City of Green--Another thought or two

A couple more thoughts on the topic of the green-goggled city.

In The Matrix, there's at least one mention of Oz--not surprising of course with the parallel world analogy. But another parallel that might not be so obvious is that the cities inside the matrix tend to all be tinted green, as though seen through a green filter, just like the Emerald City. And in both cases, the populace is largely controlled by an uncaring dictator who controls them by misleading them.

Also, a friend pointed out an interesting side effect that might be visible to Emerald Citizens when they first see the outside world, assuming they are physiologically capable of seeing other colors. When you look at one color or image too long, then when you close your eyes or look away you often see an afterimage, everything still in the same place but with all the colors inverted to their negative--black becomes white, green becomes red, etc... So these people might see everything in tints of red for a while until their eyes cope and adjust.

On a related side-story, I took a car trip with my older brother a decade or so ago. I wasn't old enough to drive yet, so he did all the driving, and I tended to be lulled to sleep by the sound of the engine. On more than one occasion I woke up to find the whole world was tinted green! The effect faded after a few seconds or a minute, and then everything was normal again. It was bizarre! I recently found out that it was probably just another afterimage. I must have been sleeping in direct sunlight so that the sun glowed red through my eyelids. After hours of red exposure, I woke up, and opened my eyes, and everything was tinted green--the negative of the red filter provided by my eyelids. Crazy stuff. :)