Objective To show imaging findings of inferior orbital fissure(IOF)and groove(IOG)on axial CT scans and to discover their anatomic variations,so as to avoid misdiagnosing them as orbital fracture.

• 目的研究正常人眶下裂和眶下沟横断面CT表现及其解剖基础,避免将其误认为眶壁骨折。