The microscope is an instrument that allows observing elements or structures that can not be observed at the naked eye, through lenses, viewers and light rays, which bring or enlarge the image on scales suitable for examination and subsequent analysis. He was invented by the Dutch Zaccharias Janssen in the sixteenth century.

A pathologist is a doctor who specializes in pathological anatomy, a science that studies the pathophysiological and morphological alterations of the disease, that is, it studies the disease from its organic, tissue, cellular, subcellular, and molecular level. This professional is a highly qualified person, with solid theoretical and practical knowledge, which allows him to handle procedures in the investigation of diseases and possible diagnoses.

The microscope is an instrument that increases the size of an image and allows you to see more details than would be possible to perceive with the naked eye. The condenser of a microscope is a key part of a microscope, it focuses the light that passes through the stage of the microscope where the sample is placed, thus providing illumination, contrast and clarity in a uniform way to the sample.