Lamina papyracea

Last revised by Craig Hacking on 2 Jul 2021

The lamina papyracea, also known as the orbital lamina of the ethmoid bone, is the principal component of the medial wall of the orbit, and also the lateral surface of the ethmoid air cells.

It articulates:

It thickens posteriorly to form the optic tubercle, protecting the optic nerve.

Lamina papyracea is Latin for paper-thin, which is an appropriate term to describe this thin sheet or paper-like osseous structure.

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Cases and figures

  • Figure 1: labeled 12
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  • Figure 2: lateral view (Gray's illustrations)
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