You can make the eyeballs bigger or you can make them look bigger. You can do it in
Poser or with textures or a combination of both. Is it the whole eye or just the pupil, iris etc you want to have larger. Are you going to use a morph on the face, you might need larger eye sockles like stated above. Send me an im and i can tell you how to do it, depending on what you want.
Beautiful pic btw =D> =D> =D>