Nope.  Invisibility within Poser serves several purposes.  Eliminating pokethrough is one, especially when using full body clothing and to correct offending areas due to posing.  Making select areas invisible is another particularly to concentrate on other scene aspects and composing.  Invisibility is also useful in replacing body parts with props.  However, rendering eyes invisible will not create an empty background area behind it; it will only the back of the head.  Creating a transparency map and applying it in the material room is, perhaps, the only way.