After thinking about this question for a while, this is what I came up with. I thought about a human eye and a fly's eye. You can reflect a light off a human eye and the light would return in the direction of the light source, based on looking at a mirror. Now looking at the eye of a fly, it reminds me of the sun shade. If you shine a light on it, the light travels in a lot of different directions. This would seem to be better, sorta 1 dimension versus 3D.

Just thinking out loud....
Get stoned and give it a ponder....:stoned: