When you say the eye can focus on both near and far at the same time, you're mistaken. The eye is just quick at adapting, and less so as you age. I assure you that while I type this, my keyboard is in focus but the rest of the train comopartment where I am is very much blurred. Since I'm slightly myopic, the effect is worse than on a "normal" eye, but still visible. You just don't think about it because whatever you LOOK at is in focus.

As your eyes get older and he lens is getting less flexible, it takes longer to adjust, and also you get more ...er whatever the opposite of myopic is in English... But still, in general, what you look at is what you focus at. Funny thing is, you can consciously blur your vision by "staring into space" but the opposite - to make everything sharp, isn't possible.

That said, I agree that the lack of depth is what makes most renders look fake. And because it's something your eyes usually do automatically, it takes a consious effort to even realise. It's one of those niggling things where you know there's something wrong but you can't put your finger on it.
 

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
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