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We thank Dr. Killer for his interest in our study. We fully agree with him that (1) the assumption of a narrow orbital cerebrospinal fluid (CSF) space indicating a low intracranial CSF pressure is valid only if there is a free communication between the orbital CSF space and the intracranial CSF space; that (2) it has remained inconclusive whether the narrow optic nerve canal allows a free communication between the intracranial CSF space and the orbital CSF space in living human, even though studies on dogs and cadavers showed a (Read more...)

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