Yes, post the Material Room shaders for the cornea, iris, and sclera, if those material zones exist.  Catching lights from existing studio lights is easy, provided that the eye shaders are reflective enough.  If you are intending to reflect bright images on the eyes, then you need a background, or backdrop, in the scene.  In past Poser versions, this was hacked into the material shaders by actually connecting a distorted, reflective image map to the root node.  However, upon close-up rendering, you could see that the reflected image never matched the actual surrounding environment.