Quote - Eye cross section.

http://lane.stanford.edu/bassett/raw/bassettLargerView.html?t=largerView&bn=58-2
http://lane.stanford.edu/bassett/raw/bassettLargerView.html?t=largerView&bn=58-3

Mike, your lens is way too tiny. The lens is almost as large as the iris, and the iris floats over it like a ring shaped island.

Excellent find!

To summarize what I see:
1) The iris is slightly convex, but a bit flatter than the sclera.
2) There's an indentation towards the iris, just as in lesbentley's morph.
3) The iris tucks in smoothly under the cornea and sclera, so instead of the sharp angle I have there now, I should just set it back in order to get some shadowing.

I'm still wondering about the way the iris catches diffuse light that's stronger on one side (like from a large window). I agree that diffraction of incoming light can't be responsible. Could it be inward reflection from the surface of the sclera?

-- I'm not mad at you, just Westphalian.