Displays, monitors and controllers for diagnostic apparatus for medical purposes; diagnostic apparatus for medical purposes comprising diagnostic imaging apparatus, displays, monitors and software therefor; medical apparatus and instruments for use in mammography equipment and monitors therefor; radiological apparatus for medical use and monitors therefor; radiology screens for medical purposes; medical apparatus and instruments for use in diagnostic cardiology equipment and monitors therefor; medical apparatus and instruments for use in pathology equipment and monitors therefor; patient medical monitors for monitoring vital signs of patients; medical diagnostic apparatuses for eye gaze tracking and measuring for the medical diagnosis of human developmental disorders, such as autism, comprising medical imaging apparatuses, computer displays, liquid crystal displays, computer monitors and operating software therefor sold as a unit; medical diagnostic apparatuses for eye gaze tracking and measuring for the medical diagnosis of human developmental disorders, such as autism, comprising medical imaging apparatuses, computer displays, liquid crystal displays, computer monitors and operating software therefor for use in direct association with said medical diagnosis apparatus during the process of diagnosis of a condition in an individual; medical apparatus and instruments for measuring, analyzing, diagnosing, examining and testing exosomes in body fluids; particle measuring apparatus and instruments that are used to measure, analyze, diagnosis, examine and test exosomes in body fluids for medical and medical diagnostic use; structural parts and fittings for the aforesaid apparatus and instruments; hearing aids; medical hearing instruments; ear plugs for sleeping; ear plugs for soundproofing; hearing protectors