The problem is in fact more complex:  the eyeball should have a flat iris with a curved lens over it. It should be wet. And, due to gravity, the tear liquid should accumulate and add specular light to where the eyeball meets the lower eyelid. The teargland should be partly covered by a membrane, the last left-over from a third eyelid. The lower eyelid should disappear beneath the upper one at the outside, etc etc.

It's not a question of knowing how to do it in 3D: it is possible, but within limits. But eyes, even when created in XSI, Maya, Max or whatever are usually what betrays digital humans. And no texture of an iris, however photographic it may be, will ever add life to a digital eye if the eye itself is not correct.

I visited your gallery, and why don't you show it in your works, for example in your "Mindy"? Speculars cannot be where there should be shadow.