The weakest wall of the human orbit is
Each orbit resembles a four-sided pyramid on one side. The four walls of the orbit are: roof, floor, lateral and medial walls. The medial wall is very thin. From before backward, it is formed by (a) The frontal process of the maxilla; (b) the lacrimal bone; (c) the orbital plate of the ethmoid; and (d) the body of the sphenoid bone. <img src=" /> Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition.
Roof
Medial wall
Floor
Lateral wall
Head and neck