Vitreous fovea traction played some roles in the formation of idiopathic macula hole in its early stage, but the traction included anterior and tangential direction.
玻璃体黄斑牵拉力在裂孔形成早期阶段起一定作用，其作用方向可能包括前向和切线方向。
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Conclusion: The imaging anatomy of ethmoidal roof, cribrum and understanding of the formation of olfactory fovea is the instructive significance for anterior skull base surgery.