If you have P6 or later you could try the file linked above. It adds dials to the Body to rotate (side-side & up-down) and translate both eyes at once. It should work on almost any figure.

Save the file to a pose folder. It is named "EyesMove.pz2.TXT", delete the ".TXT" part of the file extension.

For some different ways to do the same thing, that work in earlier versions of poser, see  "Injecting ERC slaving (part 3)"  and " Injecting ERC slaving (part 4)."  in this thread:

** http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2735605
**