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I did a little more work to it. I'm not sure how to attach the iris to the cornea area. I can't tell if that picture is meant to indicate the cornea's thickness, or the way it was illustrated. It doesn't seem right to me that a cornea's thickness would be about a quarter of a pupil's width.

If you wanted to be perfectly realistic, shouldn't you model the inner surface of the cornea and connect that to the iris surface?

According to this, though, the refractive indices of the cornea and the anterior chamber are pretty close, so it seems a bit pointless.

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