A patient present with enophthalmos after a trauma to face by blunt object.There is no fever and no extraocular muscle palsy. Diagnosis is:
Fracture maxilla
Fracture zygoma
Blow out fracture
Fracture ethmoid
Blow out fracture is isolated fracture of orbital floor, when a large blunt object strikes the globe. It presents with:Ecchymosis of lid, conjunctiva and scleraEnophthalmosDiplopia due to displacement of eye ballAnaesth esia of cheek and upper lip, if infraorbital nerve is involved.