The following is an excerpt....
BASICS
Description
- Defined as an orbital floor fracture without orbital rim involvement
- Results from sudden blunt trauma to the globe:
- Typically caused by the force of a projectile >half the size of the fist
- Force transmitted through the noncompressible structures of the globe to the weakest structural point: The orbital floor
- Transmitted force “blows out” or fractures the orbital floor.
- Orbital floor serves as roof to air-filled maxillary and ethmoid sinuses:
- Communication between the spaces results in orbital emphysema.
- Orbit contains fat, which holds the globe in place:
- Orbital floor fracture may result in herniation of the fat on the inferior orbital surface into the maxillary or ethmoid sinuses.
- Leads to enophthalmos owing to orbital volume loss and sinus ...
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