Monocular microscopes, or single-eyepiece microscopes, are often used to study very small objects and organisms that can't normally be observed by the naked eye, such as cells, fungi and bacteria. These microscopes feature a magnification power typically ranging from 40x up to 1400x.
The invention of the microscope has lead to the discovery of otherwise imperceptible organisms, such as cells and bacteria. Compound microscopes utilize microscope slides, which are often made of silver or glass, where the specimen is mounted. Once the microscope's lenses are focused on the subject, the microscope produces a flat virtual image that requires some degree of analysis on the part of the observer.