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CT images demonstrate a minimally displaced fracture, running in the sagittal plane, through the floor of the left orbit, just medial to the infra-orbital canal. The inferior rectus muscle is entrapped within the defect. There is an associated angulation seen within the inferior rectus on the sagittal images.
Appearances are consistent with a trapdoor-type blowout fracture of the left orbital floor, with entrapment of the left inferior rectus muscle.