Method for detecting pulsatile dynamics of the optic nerve sheath, diagnostic methods, medical uses, non-invasive markers, systems and transducer devices

A method for non-invasively calculating a marker indicating possibly increased intracranial pressure (ICP) of a patient, the method comprising:

• using a transducer device to monitor displacement of an optic nerve sheath (ONS) of the patient at a first location on a first side of the ONS over a period of time and at a second location on a second side of the ONS over the period of time;
• comparing the displacement of the ONS at the first location with the displacement of the ONS at the second location;
• and
• using the compared displacement of the ONS at the first location and at the second location to determine a measure of stiffness as a marker indicating possibly increased intracranial pressure (ICP) of the patient, wherein nearly equal displacement of the ONS at both the first and second locations corresponds to increased ONS stiffness and higher ICP compared to a normal individual.