GB/T 22132-2008 specifies the diameter standard for Microscope replaceable eyepieces. In the use scenario of Microscope, the replaceable eyepieces need to be adapted to the main body of the Microscope, and their diameter is a key dimensional parameter. The standard specifies the specific values and tolerance ranges of the diameters of different types of Microscope replaceable eyepieces. This provides manufacturing specifications for eyepieces Manufacturers to ensure that the eyepieces can be assembled smoothly with various types of Microscopes; it is also convenient for users to quickly find suitable products when changing eyepieces, to ensure the normal use of the Microscope, and to promote the stable observation function of the Microscope in various fields.