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1. ORBITAL ROOF - orbital part of the frontal bone + bit of lesser wing of sphenoid at the back.

2. MEDIAL WALL - 5cm long, extends across anterior lacrimal crest on frontal process of maxilla => lacrimal bone => orbital plate of ethmoid bone => body of sphenoid => optic canal. B/W the anterior + posterior lacrimal crests is the fossa for the lacrimal sac which leads down into the nasolacrimal canal.

3. LATERAL WALL - 5cm long, extends across zygomatic bone (with marginal tubercle of Whitnall ) => greater wing of the sphenoid.

4. FLOOR - extends across the orbital surface of the maxilla + zygomatic bones => orbital process of palatine bone at the back.


1. Mcminn. (2003). Last's Anatomy. Elsevier Australia. ISBN:0729537528. Read it at Google Books - Find it at Amazon
2. Netter, F. H. (2019). Atlas of human anatomy. Philadelphia, PA: Elsevier.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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