Its formed, from anterior to posterior, by the frontal process of the maxilla, the lacrimal bone (LB), the orbital plate of the ethmoid bone or lamina papyracea (LP), and the body of the sphenoid bone. The medial wall is extremely thin, especially in the area of the orbital plate of the ethmoid bone, which separates the orbit and ethmoid air cells. The anterior and posterior ethmoidal foramina (white and yellow arrows), which transmit the anterior and posterior ethmoidal branches of the ophthalmic artery and the nasociliary nerve.

http://www.3dneuroanatomy.com/wp-content/uploads/2014/12/orb5.jpg