Floor of the Orbit
The orbital floor is made up of the maxillary bone, the palatine bone, and the orbital plate of the zygomatic bone. The floor of the orbit forms the roof of the maxillary sinus. It does not extend to the orbital apex but instead ends at the pterygopalatine fossa; hence, it is the shortest of the orbital walls.
Important landmarks include the infraorbital groove and infraorbital canal, which transmit the infraorbital artery and the maxillary division of the trigeminal nerve.
Figure 1-3 Orbital bones, orbital floor, internal view.
(Modified with permission from Dutton JJ. Atlas of Clinical and Surgical Orbital Anatomy. Philadelphia: Saunders; 1994:11.)
Excerpted from BCSC 2020-2021 series: Section 10 - Glaucoma. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.