A monocular microscope is used for viewing very small objects through an eye piece and lens for the purpose of magnification. As opposed to a binocular microscope, it has only one eye piece and lens. It works in the same way a binocular microscope does.
Microscopes are used to view very small objects through an eyepiece and lens. They are often used in science to look at small organisms that would be invisible to the naked eye. Microscopes come in different varieties, with the two most common being binocular and monocular.