Blow out fracture of orbit commonly produces
(D) Fracture of floor of orbit # Blow out fracture of orbit; Intraorbital haemorrhages, proptosis, paralysis of extrinsic muscles and fracture of the floor of the orbit are not infrequent following a blunt injury to the orbital region> Proptosis develops due to reactive oedema and intra-orbital haemorrhage.> Partial or complete ophthalmoplegia occurs as a result of injury to the muscles or due to profuse orbital oedema.> In the fracture of the floor of orbit, the eyeball is depressed into the maxillary antrum & the inferior rectus and inferior oblique muscles are entrapped causing diplopia.> There occurs limitation of upward gaze, and downward gaze may also be reduced because of the pinched inferior rectus muscle in between the chips of the broken bone> A positive forced duction test, downwards and inwards displacement of the globe and radiological evidence virtually confirm the diagnosis of blowout fracture with incarcerated orbital tissue.> The fracture of the base of skull implicates optic foramen and may cause optic atrophy or pulsating exophthalmos.> The fracture of the optic canal is characterised by a wound at the lateral part of the eyebrow, loss of direct homolateral pupillary reaction and hemianopic field defects.> The patient may suffer from epistaxis and varying periods of unconsciousness.> The pallor of the optic disc may be noticed 2-3 weeks after the injury. Serial radiological tomograms taken at one minute intervals may confirm the diagnosis.
Deviation of septum
Retinal haemorrhage
Fracture of nasal bones
Fracture of floor of orbit
Miscellaneous