Attach in this order inferiorly posteriorly. The most complex. Consists of portion of frontal, lacrimal, ethmoidal, and sphenoid bones arranged anteriorly to posteriorly. Lamina papyracea, part of ethmoidal bone is extremely thin and forms the largest section of the medial wall. Anterior lacrimal crest formed by the frontal process of the maxilla forms the most anterior extent of the medial wall.
Lacrimal fossa is defined posteriorly by the posterior lacrimal crest, part of the lacrimal bone.
The soft s of the orbit are complex and must be approached systematically. Skin Subcutaneous areolar tissue. Submuscular areolar tissue. Fibrous layer with tarsal plates. Nonstriated smooth muscle.