Blow-in fracture Relatively rare Symptoms sign: Protruding eye, swelling eyelids and zygoma Palpation: infraorbital edge---stairs-like Diagnosis Clinical manifestation, X-ray, CT scans Treatment: Reduction after 7-10d post-woundBlow-in fracture Relatively rare. Symptoms & Sign： Protruding eye, swelling eyelids and zygoma, Palpation: infraorbital edge---“stairs-like”. Diagnosis： Clinical manifestation, X-ray, CT scans Treatment： Reduction after 7—10d post-wound