According to an aspect, there is provided a method for measuring the intracranial pressure, ICP, in a subject, the method comprising detecting whether spontaneous retinal venous pulsations, SRVPs, are occurring in an eye of the subject as the orientation of the head of the subject changes； identifying the orientation of the head of the subject at which SRVPs start to occur or stop occurring； and using the identified orientation of the head of the subject at which SRVPs start to occur or stop occurring to determine the ICP in the subject.
