Thanks Joel. All in good time. ;-)

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.
The problem is on the outer edge of the iris and why I just brought it straight forward and up for now. I can't tell if I'm supposed to curve it more inward, or double it back on itself then bring it forward...

It's up to 4500 polygons right now and won't need much more. Making the lens lower-res would shave off about 500 polys probably, and the eyeball/cornea itself can be reduced a lot. Most of the detail would need to be in the iris.