A stand alone flat bed scanner including a CPU, a removable storage medium, a control system displaying digital image and controls for controlling the mode of operation, degree of resolution, related parameters associated with generating, storing and displaying digital data. When receiving the transmission request, the terminal apparatus forwards as communication request to the host apparatus. The switch directs the connection to an enrollment module if the certificate does not correspond to the service provider’s required certificate, where the user can attempt to obtain the appropriate certificate from the enrollment module to ultimately access the targeted secure service. The devices and methods of the present invention are particularly suitable for microsurgery applications including ophthalmic or neurosurgical procedures. The leaf spring member is disposed so as to be in sliding contact with the inner peripheral surface of the tubular member and is configured to urge the inner peripheral surface of the tubular member outward in a radial direction of the tubular member.