Transorbital foreign bodies penetrating through the superior orbital fissure are usually associated with either severe permanent ocular complications or death of the patient. A case is presented in which the hooked end of a spring penetrated the superior orbital fissure and lodged around the lesser wing of the sphenoid bone. The spring was removed surgically through a transorbital approach with no permanent ocular or neurologic complications. This case exemplifies the fact that radiologic views of the skull and orbit may be unreliable in assessing the type of intracranial penetration.
Merritt RD, Chisholm L, Fleming AFR, Schwartz ML. Foreign-Body Penetration Through the Superior Orbital Fissure. Arch Ophthalmol. 1973;90(1):67-68. doi:10.1001/archopht.1973.01000050069015