What bone does not occur in the orbit?

I'm curious to know, which bone in the human body does not play a role in forming the orbit? Given that the orbit is a bony structure that surrounds and protects the eye, it's fascinating to learn about the intricate structure of the skull and the bones that contribute to it. Is there a specific bone that's absent from this crucial region, and if so, why is it not necessary for the formation of the orbit? Understanding this can give us valuable insights into the evolutionary development of the human skull and its various components.