Valsalva manoeuver, intra-ocular pressure, cerebrospinal fluid pressure, optic disc topography: Beijing intracranial and intra-ocular pressure study.

PURPOSE To assess whether a Valsalva manoeuver influences intra-ocular pressure (IOP), cerebrospinal fluid pressure (CSF-P) and, by a change in the trans-laminar cribrosa pressure difference, optic nerve head morphology. METHODS In the first part of the study, 20 neurological patients (study group 'A') underwent measurement of IOP and lumbar CSF-P… CONTINUE READING