I'm not a poser person, really, but here's a thought that you might be able to work with. One of the distinctive things about the lens of the eye is its refractive property. Perhaps your cornea should be mostly transparent (98% or more) and should have some refractive index added, as well. I'm not sure how the DAZ eyes are built, so I don't know how this would be implemented, but it should add to the realism of the eye, I think.... - Dex