A method for measuring the relative thickness of the lipid layer component of the precorneal tear film on the surface of an eye. The invention uses a centrifugal scrubbing space to liquid wet a gas and includes a container for containing a liquid with a pump to circulate the liquid. The discrimination information is designed to distinguish the area that can be displayed by a second terminal device that can use the map information for distribution, from the other portions in the map displayed by the first terminal device based on the map information for displaying search results. Said spider, spacer and diaphragm are coupled by adhesive and fixed on top of said frame.