Porro prisms are optical components made from high-quality glass such as BK7, designed to invert and revert images through internal total reflection. The prism pair configuration enables image rotation while maintaining optical clarity and minimal light loss. These prisms are manufactured through precision cutting, polishing, and angular alignment to ensure accurate reflection paths. They are widely used in binoculars, optical rangefinders, surveying instruments, and imaging devices where correct image orientation is required. The optical principle relies on controlled total internal reflection to achieve efficient beam folding.