The problem often is not the eyes themselves but the lashes cover the eyes in shadow. Try repositioning yotu lights so the light is directly inthe eyes you will see them again/ Also try making the lashes transparent. Up the ambience on the eyes by changing the ambient color and changing the specular color. These are a couple options that you can try.

The wit of a misplaced ex-patriot.
I cheated on my metaphysics exam by looking into the soul of the person next to me.