The application of microscope magnification to the study of materials that cannot be properly seen by the unaided eye.

The examination of minute objects by means of a microscope, an instrument which provides an enlarged image of an object not visible with the naked eye. See the entire definition of Microscopy

Microscopy is any technique for producing visible images of structures or details too small to otherwise be seen by the human eye, using a microscope or other magnification tool. It is often used more specifically as a technique of using a microscope.

The use of the microscope; investigation with the microscope.

The use of a microscope. Or, more specifically, investigation by means of a microscope. from Webster's New World Dictionary

The investigation of the panel and its components with a microscope.

research with the use of microscopes