Retinal vein pulsation is in phase with intracranial pressure and not intraocular pressure

摘要

We would like to congratulate Morgan et al.1 for their important study on the phase of retinal vein pulsations in relation to intracranial pressure. They found a difference in the phasing of the intraocular pressure (IOP) curve and that of the intracranial pressure (ICP) curve with respect to the cardiac cycle, with the ICP curve reaching its height earlier than the IOP curve.