A comparison microscope, sometimes known also as stereomicroscope or issecting microscope, is a device used to analyze side-by-side specimens. It consists of two microscopes connected to an optical bridge, which results in a split view window. The comparison microscope is used in forensic sciences to compare microscopic patterns and identify or deny their common origin. The idea behind the comparison microscope is simple. Two microscopes are placed next to each other and the optical paths of each microscope are connected together by the optical bridge would help the forensic examiners to compare two specimens simultaneously instead of depending on their memory.